19-3864; Rev 3; 10/06 High-Performance, Single-Ended, Current-Mode PWM Controllers The MAX5094A/B/C/D/MAX5095A/B/C BiCMOS, highperformance, current-mode PWM controllers have all the features required for wide input-voltage range isolated/nonisolated power supplies. These controllers are used for low- and high-power universal input voltage and telecom power supplies. The MAX5094/MAX5095 contain a fast comparator with only 60ns typical delay from current sense to the output for overcurrent protection. The MAX5094 has an integrated error amplifier with the output at COMP. Softstart is achieved by controlling the COMP voltage rise using external components. The oscillator frequency is adjustable from 20kHz to 1MHz with an external resistor and capacitor. The timing capacitor discharge current is trimmed allowing for programmable dead time and maximum duty cycle for a given frequency. The available saw-toothed waveform at RTCT can be used for slope compensation when needed. The MAX5095A/MAX5095B include a bidirectional synchronization circuit allowing for multiple controllers to run at the same frequency to avoid beat frequencies. Synchronization is accomplished by simply connecting the SYNC of all devices together. When synchronizing with other devices, the MAX5095A/MAX5095B with the highest frequency synchronizes the other devices. Alternatively, the MAX5095A/MAX5095B can be synchronized to an external clock with an open-drain output stage running at a higher frequency. The MAX5095C provides a clock output pulse (ADV_CLK) that leads the driver output (OUT) by 110ns. The advanced clock signal is used to drive the secondary-side synchronous rectifiers. The MAX5094A/B/C are available in the 8-pin SO and 8-pin MAX (R) packages. The MAX5094D and MAX5095A/B/C are available in the 8-pin MAX package. All devices operate over the automotive temperature range of -40C to +125C. Applications Universal Input AC/DC Power Supplies Isolated Telecom Power Supplies Isolated Power-Supply Modules Networking Systems Computer Systems/Servers Industrial Power Conversion Isolated Keep-Alive Circuits MAX is a registered trademark of Maxim Integrated Products, Inc. Features Pin-for-Pin Replacement for UCC28C43 (MAX5094A) and UCC28C45 (MAX5094B) 2A Drive Source and 1A Sink Capability Up to 1MHz Switching Frequency Operation Bidirectional Frequency Synchronization (MAX5095A/MAX5095B) Advanced Output Drive for Secondary-Side Synchronous Rectification (MAX5095C) Fast 60ns Cycle-by-Cycle Current Limit Trimmed Oscillator Capacitor Discharge Current Sets Maximum Duty Cycle Accurately Accurate 5% Start Voltage with 0.8V Hysteresis Low 32A Startup Current 5V Regulator Output (REF) with 20mA Capability Versions with 0.3V Current-Sense Threshold Overtemperature Shutdown Ordering Information PART PINPACKAGE TEMP RANGE PKG CODE MAX5094AASA -40C to +125C 8 SO MAX5094AASA+ -40C to +125C 8 SO S8-4 S8-4 MAX5094AAUA* -40C to +125C 8 MAX U8-1 MAX5094AAUA+ -40C to +125C 8 MAX U8-1 MAX5094BASA* -40C to +125C 8 SO S8-4 MAX5094BASA+ -40C to +125C 8 SO S8-4 MAX5094BAUA* -40C to +125C 8 MAX U8-1 MAX5094BAUA+ -40C to +125C 8 MAX U8-1 +Denotes lead-free package. *Future product--contact factory for availability. Ordering Information continued at end of data sheet. Pin Configurations TOP VIEW 8 REF 7 VCC 3 6 OUT RT/CT 4 5 GND COMP 1 FB 2 MAX5094 CS MAX/SO Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 MAX5094A/B/C/D/MAX5095A/B/C General Description MAX5094A/B/C/D/MAX5095A/B/C High-Performance, Single-Ended, Current-Mode PWM Controllers ABSOLUTE MAXIMUM RATINGS VCC (Low-Impedance Source) to GND ..................-0.3V to +30V VCC (ICC < 30mA).....................................................Self Limiting OUT to GND ...............................................-0.3V to (VCC + 0.3V) OUT Current.............................................................1A for 10s FB, SYNC, COMP, CS, RT/CT, REF to GND .............-0.3V to +6V COMP Sink Current (MAX5094)..........................................10mA Continuous Power Dissipation (TA = +70C) 8-Pin MAX (derate 4.5mW/C above +70C) .............362mW 8-Pin SO (derate 5.9mW/C above +70C)...............470.6mW Operating Temperature Range .........................-40C to +125C Maximum Junction Temperature .....................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VCC = +15V, RT = 10k, CT = 3.3nF, REF = open, CREF = 0.1F, COMP = open, VFB = 2V, CS = GND, TA = TJ = -40C to +85C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 4.950 5.000 5.050 V 0.4 4 mV 6 25 mV 5.1 V -180 mA REFERENCE Output Voltage VREF TA = +25C, IREF = 1mA Line Regulation VLINE 12V VCC 25V, IREF = 1mA Load Regulation VLOAD 1mA IREF 20mA Total Output Variation VREFT 1mA IREF 20mA, 12V VCC 25V Reference Output-Noise Voltage VNOISE 10Hz f 10kHz, TA = +25C Reference Output Short Circuit IS_SC 4.9 50 -100 V VREF = 0V -30 Initial Accuracy TA = +25C 51 54 57 kHz Voltage Stability 12V VCC 25V 0.2 0.5 % Temp Stability -40C TA +85C 0.5 % VRAMP 1.7 V VRAMP_VALLEY 1.1 OSCILLATOR RT/CT Voltage Ramp (P-P) RT/CT Voltage Ramp Valley Discharge Current IDIS Frequency Range fOSC V VRT/CT = 2V, TA = +25C 7.9 8.3 8.7 VRT/CT = 2V, -40C TA +85C 7.5 8.3 9.0 20 1000 mA kHz ERROR AMPLIFIER (MAX5094) FB Input Voltage VFB FB shorted to COMP FB Input Bias Current IB(FB) Open-Loop Voltage Gain AVOL Unity-Gain Bandwidth fGBW Power-Supply Rejection Ratio PSRR 12V VCC 25V (Note 2) ISINK VFB = 2.7V, VCOMP = 1.1V COMP Sink Current 2.465 2V VCOMP 4V COMP Source Current ISOURCE VFB = 2.3V, VCOMP = 5V COMP Output High Voltage VCOMPH VFB = 2.3V, RCOMP = 15k to GND COMP Output Low Voltage VCOMPL VFB = 2.7V, RCOMP = 15k to REF 60 2.5 2.535 V -0.01 -0.1 A 100 dB 1 MHz 80 dB 2 6 -0.5 -1.2 5 5.8 mA -1.8 mA V 0.1 1.1 V CURRENT-SENSE AMPLIFIER Gain (Notes 3, 4) 2 ACS (MAX5094A/MAX5094B) 2.85 3 3.26 V/V (MAX5094C/D, MAX5095_) 2.85 3 3.40 V/V _______________________________________________________________________________________ High-Performance, Single-Ended, Current-Mode PWM Controllers MAX5094A/B/C/D/MAX5095A/B/C ELECTRICAL CHARACTERISTICS (continued) (VCC = +15V, RT = 10k, CT = 3.3nF, REF = open, CREF = 0.1F, COMP = open, VFB = 2V, CS = GND, TA = TJ = -40C to +85C, unless otherwise noted.) (Note 1) PARAMETER Maximum Current-Sense Signal SYMBOL VCS_MAX CONDITIONS MIN TYP MAX MAX5094A/B (Note 3) 0.95 1 1.05 MAX5094C/MAX5094D (Note 3) 0.275 0.3 0.325 VCOMP = 5V, MAX5095 0.275 0.3 0.325 UNITS V 12V VCC 25V 70 VCOMP = 0V -1 tCS_DELAY 50mV overdrive 60 OUT Low-Side On-Resistance VRDS_ONL ISINK = 200mA 4.5 10 OUT High-Side On-Resistance VRDS_ONH ISOURCE = 100mA 3.5 7 Power-Supply Rejection Ratio Input Bias Current PSRR ICS Delay From CS to OUT dB -2.5 A ns MOSFET DRIVER ISOURCE (Peak) ISOURCE COUT = 10nF 2 ISINK COUT = 10nF 1 A Rise Time tR COUT = 1nF 15 ns Fall Time tF COUT = 1nF 22 ns ISINK (Peak) A UNDERVOLTAGE LOCKOUT/STARTUP Startup Voltage Threshold VCC_START 7.98 8.40 8.82 V Minimum Operating Voltage After Turn-On VCC_MIN 7.1 7.6 8.0 V Undervoltage-Lockout Hysteresis UVLOHYST 0.8 V PWM Maximum Duty Cycle DMAX Minimum Duty Cycle DMIN MAX5094A/MAX5094C/MAX5095A 94.5 96 97.5 MAX5094B/MAX5094D/MAX5095B/ MAX5095C 48 49.8 50 0 % % SUPPLY CURRENT Startup Supply Current VCC = 7.5V 32 65 A Operating Supply Current ISTART ICC VFB = VCS = 0V 3 5 mA Zener Bias Voltage at VCC VZ ICC = 25mA 24 26.5 V THERMAL SHUTDOWN Thermal Shutdown TSHDN Thermal Shutdown Hysteresis THYST Junction temperature rising 150 C 4 C SYNCHRONIZATION (MAX5095A/MAX5095B Only) (Note 5) SYNC Frequency Range SYNC Clock Input High Threshold SYNC Clock Input Low Threshold SYNC Clock Input Minimum Pulse Width fSYNC 20 VSYNCINH 3.5 0.8 tPW_SYNCIN 200 VSYNCOH 1mA external pulldown SYNC Clock Output Low Level VSYNCOL RSYNC = 5k ISYNC VSYNC = 0V 4.0 kHz V VSYNCINL SYNC Clock Output High Level SYNC Leakage Current 1000 V ns 4.7 V 0 0.1 V 0.01 0.1 A _______________________________________________________________________________________ 3 MAX5094A/B/C/D/MAX5095A/B/C High-Performance, Single-Ended, Current-Mode PWM Controllers ELECTRICAL CHARACTERISTICS (continued) (VCC = +15V, RT = 10k, CT = 3.3nF, REF = open, CREF = 0.1F, COMP = open, VFB = 2V, CS = GND, TA = TJ = -40C to +85C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP 2.4 3 MAX UNITS ADV_CLK (MAX5095C Only) ADV_CLK High Voltage VADV_CLKH IADV_CLK = 10mA source ADV_CLK Low Voltage VADV_CLKL IADV_CLK = 10mA sink V 0.4 V ADV_CLK Output Pulse Width tPULSE 85 ns ADV_CLK Rising Edge to OUT Rising Edge tADV_CLK 110 ns ADV_CLK Source and Sink Current IADV_CLK 10 mA ELECTRICAL CHARACTERISTICS (VCC = +15V, RT = 10k, CT = 3.3nF, REF = open, CREF = 0.1F, COMP = open, VFB = 2V, CS = GND, TA = TJ = -40C to +125C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 4.950 5.000 5.050 V 0.4 4 mV 6 25 mV REFERENCE Output Voltage VREF Line Regulation VLINE TA = +25C, IREF = 1mA 12V VCC 25V, IREF = 1mA Load Regulation VLOAD 1mA IREF 20mA Total Output Variation VREFT 1mA IREF 20mA, 12V VCC 25V Reference Output-Noise Voltage VNOISE 10Hz f 10kHz, TA = +25C Reference Output Short Circuit IS_SC 4.9 5.1 50 VREF = 0V -30 Initial Accuracy TA = +25C 51 Voltage Stability 12V VCC 25V -100 V V -180 mA 54 57 kHz 0.2 0.5 % OSCILLATOR -40C TA +125C Temp Stability RT/CT Voltage Ramp (P-P) RT/CT Voltage Ramp Valley 1 % VRAMP 1.7 V VRAMP_VALLEY 1.1 V Discharge Current IDIS Frequency Range fOSC VRT/CT = 2V, TA = +25C 7.9 8.3 8.7 VRT/CT = 2V, -40C TA +125C 7.5 8.3 9.0 20 1000 mA kHz ERROR AMPLIFIER (MAX5094) FB Input Voltage VFB FB shorted to COMP 2.465 2.5 2.535 V -0.01 -0.1 A FB Input Bias Current IB(FB) Open-Loop Voltage Gain AVOL Unity-Gain Bandwidth fGBW Power-Supply Rejection Ratio PSRR 12V VCC 25V (Note 2) 60 80 dB COMP Sink Current ISINK VFB = 2.7V, VCOMP = 1.1V 2 6 mA -0.5 -1.2 5 5.8 2V VCOMP 4V COMP Source Current ISOURCE VFB = 2.3V, VCOMP = 5V COMP Output High Voltage VCOMPH VFB = 2.3V, RCOMP =15k to GND COMP Output Low Voltage VCOMPL VFB = 2.7V, RCOMP = 15k to REF 4 100 dB 1 MHz 0.1 _______________________________________________________________________________________ -1.8 mA V 1.1 V High-Performance, Single-Ended, Current-Mode PWM Controllers MAX5094A/B/C/D/MAX5095A/B/C ELECTRICAL CHARACTERISTICS (continued) (VCC = +15V, RT = 10k, CT = 3.3nF, REF = open, CREF = 0.1F, COMP = open, VFB = 2V, CS = GND, TA = TJ = -40C to +125C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX5094A/MAX5094B 2.85 3 3.26 MAX5094C/D, MAX5095_ 2.85 3 3.40 UNITS CURRENT-SENSE AMPLIFIER Gain (Notes 3, 4) ACS Maximum Current-Sense Signal VCS_MAX MAX5094A/B (Note 3) 0.95 1 1.05 MAX5094C/MAX5094D (Note 3) 0.275 0.300 0.325 VCOMP = 5V, MAX5095_ 0.275 0.300 0.325 V/V V 12V VCC 25V 70 VCOMP = 0V -1 tCS_DELAY 50mV overdrive 60 OUT Low-Side On-Resistance VRDS_ONL ISINK = 200mA 4.5 12 OUT High-Side On-Resistance VRDS_ONH ISOURCE = 100mA 3.5 9 Power-Supply Rejection Ratio Input Bias Current PSRR ICS Delay From CS to OUT dB -2.5 A ns MOSFET DRIVER ISOURCE COUT = 10nF 2 ISINK COUT = 10nF 1 A Rise Time tR COUT = 1nF 15 ns Fall Time tF COUT = 1nF 22 ns ISOURCE (Peak) ISINK (Peak) A UNDERVOLTAGE LOCKOUT/STARTUP Startup Voltage Threshold Minimum Operating Voltage After Turn-On Undervoltage-Lockout Hysteresis VCC_START 7.98 8.4 8.82 V VCC_MIN 7.1 7.6 8.0 V UVLOHYST 0.8 V PWM Maximum Duty Cycle DMAX Minimum Duty Cycle DMIN MAX5094A/MAX5094C/MAX5095A 94.5 96 97.5 MAX5094B/MAX5094D/MAX5095B/ MAX5095C 48 49.8 50 0 % % SUPPLY CURRENT Startup Supply Current VCC = 7.5V 32 65 A Operating Supply Current ISTART ICC VFB = VCS = 0V 3 5 mA Zener Bias Voltage at VCC VZ ICC = 25mA 24 26.5 V 150 C 4 C THERMAL SHUTDOWN Thermal Shutdown TSHDN Thermal Shutdown Hysteresis THYST Junction temperature rising SYNCHRONIZATION (MAX5095A/MAX5095B Only) (Note 5) SYNC Frequency Range fSYNC 20 SYNC Clock Input High Threshold VSYNCINH 3.5 SYNC Clock Input-Low Threshold VSYNCINL SYNC Clock Input Minimum Pulse Width tPW_SYNCIN 1000 V 0.8 200 kHz V ns _______________________________________________________________________________________ 5 ELECTRICAL CHARACTERISTICS (continued) (VCC = +15V, RT = 10k, CT = 3.3nF, REF = open, CREF = 0.1F, COMP = open, VFB = 2V, CS = GND, TA = TJ = -40C to +125C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS SYNC Clock Output High Level VSYNCOH 1mA external pulldown SYNC Clock Output Low Level VSYNCOL RSYNC = 5k SYNC Leakage Current ISYNC MIN TYP 4.0 4.7 VSYNC = 0V MAX UNITS V 0 0.1 V 0.01 0.1 A 0.4 V ADV_CLK (MAX5095C Only) ADV_CLK High Voltage VADV_CLKH IADV_CLK = 10mA source ADV_CLK Low Voltage VADV_CLKL IADV_CLK = 10mA sink 2.4 3 V ADV_CLK Output Pulse Width tPULSE 85 ns ADV_CLK Rising Edge to OUT Rising Edge tADV_CLK 110 ns ADV_CLK Source and Sink Current IADV_CLK 10 mA All devices are 100% tested at +25C. All limits over temperature are guaranteed by design, not production tested. Guaranteed by design, not production tested. Parameter measured at trip point of latch with VFB = 0 (MAX5094 only). Gain is defined as A = VCOMP / VCS, 0 VCS 0.8V for MAX5094A/MAX5094B, 0 VCS 0.2V for MAX5094C/MAX5094D/ MAX5095_. Note 5: Output frequency equals oscillator frequency for MAX5094A/MAX5094C/MAX5095A. Output frequency is one-half oscillator frequency for MAX5094B/MAX5094D/MAX5095B/MAX5095C. Note 1: Note 2: Note 3: Note 4: Typical Operating Characteristics (VCC = 15V, TA = +25C, unless otherwise noted.) 7 39 37 VCC FALLING ICC (A) 6 5 4 5.1 35 CT = 560pF 4.9 4.7 33 MAX5094/95 toc03 VCC = 7.5V ICC (mA) 8 41 MAX5094/95 toc02 VCC RISING MAX5094/95 toc01 9 OPERATING SUPPLY CURRENT vs. TEMPERATURE AFTER STARTUP (fOSC = fSW = 300kHz) STARTUP CURRENT vs. TEMPERATURE BOOTSTRAP UVLO vs. TEMPERATURE 10 VCC (V) MAX5094A/B/C/D/MAX5095A/B/C High-Performance, Single-Ended, Current-Mode PWM Controllers 4.5 4.3 31 4.1 29 3.9 27 3.7 25 3.5 3 2 1 HYSTERESIS 0 6 MAX5094A/MAX5094C/MAX5095A -40 -25 -10 5 20 35 50 65 80 95 110 125 -40 -25 -10 5 20 35 50 65 80 95 110 125 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (C) TEMPERATURE (C) TEMPERATURE (C) _______________________________________________________________________________________ High-Performance, Single-Ended, Current-Mode PWM Controllers 5.06 5.04 5.000 MAX5094/95 toc05 5.05 MAX5094/95 toc04 5.08 REFERENCE VOLTAGE vs. SUPPLY VOLTAGE REFERENCE VOLTAGE vs. REFERENCE LOAD CURRENT 5.00 4.95 4.996 4.994 4.98 IREF = 20mA 4.96 4.992 4.990 4.988 4.986 4.75 4.92 4.70 4.90 4.65 4.982 4.980 0 10 20 30 40 50 60 OSCILLATOR FREQUENCY (fOSC) vs. TEMPERATURE OSCILLATOR RT/CT DISCHARGE CURRENT vs. TEMPERATURE 510 500 490 480 470 8.00 450 16 18 20 22 24 100 90 7.98 7.96 7.94 MAX5094A/MAX5094C/MAX5095A 80 26 70 60 50 40 MAX5094B/MAX5094D/MAX5095B/MAX5095C 30 7.92 20 7.90 460 14 MAXIMUM DUTY CYCLE vs. TEMPERATURE DUTY CYCLE (%) 520 8.02 12 VCC (V) MAX5094/95 toc08 530 VRT/CT = 2V RT/CT DISCHARGE CURRENT (mA) MAX5094/95 toc07 IREF (mA) 8.04 10 70 TEMPERATURE (C) RT = 3.65k CT = 560pF 540 4.984 MAX5094/95 toc09 4.94 550 10 RT = 5k CT = 560pF 0 7.88 -40 -25 -10 5 20 35 50 65 80 95 110 125 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (C) TEMPERATURE (C) TEMPERATURE (C) MAXIMUM DUTY CYCLE vs. FREQUENCY MAX5094A/MAX5094C/MAX5095A CURRENT-SENSE TRIP THRESHOLD vs. TEMPERATURE CURRENT-SENSE TRIP THRESHOLD vs. TEMPERATURE 80 70 60 50 CT = 1000pF 40 CT = 560pF CT = 220pF 1.06 1.04 1.02 1.00 0.98 30 0.96 20 0.94 10 0.92 0 0.90 0 500 1000 1500 2000 2500 3000 3500 4000 OSCILLATOR FREQUENCY (kHz) MAX5094A/MAX5094B 1.08 0.40 0.38 MAX5094C/D: VFB = 0V MAX5095_: VCOMP = 5V 0.36 CS THRESHOLD (V) CT = 100pF 1.10 CS THRESHOLD (V) 90 MAX5094/95 toc10 100 MAX5094/95 toc11b -40 -25 -10 5 20 35 50 65 80 95 110 125 MAX5094/95 toc11a OSCILLATOR FREQUENCY (kHz) 4.85 4.80 -40 -25 -10 5 20 35 50 65 80 95 110 125 DUTY CYCLE (%) 4.90 VREF (V) VREF (V) VREF (V) IREF = 1mA IREF = 1mA 4.998 5.02 5.00 MAX5094/95 toc06 REFERENCE VOLTAGE vs. TEMPERATURE 0.34 0.32 0.30 0.28 0.26 0.24 0.22 VFB = 0V 0.20 -40 -25 -10 5 20 35 50 65 80 95 110 125 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (C) TEMPERATURE (C) _______________________________________________________________________________________ 7 MAX5094A/B/C/D/MAX5095A/B/C Typical Operating Characteristics (continued) (VCC = 15V, TA = +25C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = 15V, TA = +25C, unless otherwise noted.) CT = 100pF 10 1 RDS_ON () CT = 10nF CT = 4.7nF CT = 3.3nF CT = 2.2nF 0.1 10,000 ISINK = 200mA 9 8 7 6 5 4 3 2 1 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 -40 -25 -10 5 20 35 50 65 80 95 110 125 FREQUENCY (Hz) TEMPERATURE (C) TEMPERATURE (C) PROPAGATION DELAY FROM CURRENT-LIMIT COMPARATOR TO OUT vs. TEMPERATURE ERROR-AMPLIFIER OPEN-LOOP GAIN AND PHASE vs. FREQUENCY 1,000,000 90 80 GAIN (dB) 40 VCC = 15V 2.2 -15 120 100 50 2.3 10 140 70 60 COMP VOLTAGE LEVEL TO TURN OFF DEVICE vs. TEMPERATURE MAX5094/95 toc16 MAX5094/95 toc15 100 10,000,000 -40 GAIN -65 80 PHASE 60 -90 2.1 VCOMP (V) 100,000 PHASE (DEGREES) RT (k) CT = 220pF 10 MAX5094/95 toc14 CT = 560pF ISOURCE = 100mA RDS_ON () CT = 1nF 5.0 4.8 4.6 4.4 4.2 4.0 3.8 3.6 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 MAX5094/95 toc13 MAX5094/95 toc12 1000 100 OUT IMPEDANCE vs. TEMPERATURE (RDS_ON NMOS DRIVER) OUT IMPEDANCE vs. TEMPERATURE (RDS_ON PMOS DRIVER) 2.0 1.9 1.8 40 -115 20 20 -140 1.7 10 0 -165 1.6 -20 -190 10k 100k 1M 10M 100M 1.5 30 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 0.01 1 10 100 1k TEMPERATURE (C) TEMPERATURE (C) ADV_CLK AND OUT WAVEFORMS MAX5094/95 toc19 MAX5094/95 toc18 120 118 -40 -25 -10 5 20 35 50 65 80 95 110 125 FREQUENCY (Hz) ADV_CLK RISING EDGE TO OUT RISING EDGE TIME vs. TEMPERATURE MAX5095C 116 VCC = 15V MAX5095C ADV_CLK 5V/div LOAD = 4.75k TIME (ns) 114 112 110 108 OUT 10V/div 106 104 102 100 -40 -25 -10 5 20 35 50 65 80 95 110 125 t = 20ns/div TEMPERATURE (C) 8 MAX5094/95 toc17 TIMING RESISTANCE vs. OSCILLATOR FREQUENCY PROPAGATION DELAY (ns) MAX5094A/B/C/D/MAX5095A/B/C High-Performance, Single-Ended, Current-Mode PWM Controllers _______________________________________________________________________________________ High-Performance, Single-Ended, Current-Mode PWM Controllers 7.0 6.5 VOUT 10V/div 6.0 MAX5095C CT = 100pF ICC (mA) 5.5 IOUT 4A/div 5.0 TA = +125C 4.5 TA = -40C 4.0 3.5 90 CT = 1000pF 80 CT = 560pF 70 CT = 220pF 60 50 CT = 100nF 40 3.0 t = 400ns/div 100 MAX5094/95 toc21 VCC = 15V COUT = 10nF MAXIMUM DUTY CYCLE vs. RT MAX5094A/MAX5095A DUTY CYCLE (%) MAX5094/95 toc20 2.5 30 2.0 20 20 120 220 320 420 520 620 720 820 920 1020 FREQUENCY (kHz) MAX5094/95 toc22 SUPPLY CURRENT vs. OSCILLATOR FREQUENCY OUT SOURCE AND SINK CURRENTS 100 1000 10,000 100,000 RT () Pin Descriptions MAX5094_ PIN NAME FUNCTION 1 COMP 2 FB Error-Amplifier Inverting Input 3 CS PWM Comparator and Overcurrent Protection Comparator Input. The current-sense signal is compared to a signal proportional to the error-amplifier output voltage. 4 RT/CT Timing Resistor/Capacitor Connection. A resistor RT from RT/CT to REF and capacitor CT from RT/CT to GND set the oscillator frequency. 5 GND Power-Supply Ground. Place the VCC and REF bypass capacitors close to the IC to minimize ground loops. 6 OUT MOSFET Driver Output. OUT connects to the gate of the external n-channel MOSFET. 7 VCC Power-Supply Input. Bypass VCC to GND with a 0.1F ceramic capacitor or a parallel combination of a 0.1F and a higher value ceramic capacitor. 8 REF 5V Reference Output. Bypass REF to GND with a 0.1F ceramic capacitor or a parallel combination of a 0.1F and a higher value ceramic capacitor no larger then 4.7F. Error-Amplifier Output. COMP can be used for soft-start. _______________________________________________________________________________________ 9 MAX5094A/B/C/D/MAX5095A/B/C Typical Operating Characteristics (continued) (VCC = 15V, TA = +25C, unless otherwise noted.) MAX5094A/B/C/D/MAX5095A/B/C High-Performance, Single-Ended, Current-Mode PWM Controllers Pin Descriptions (continued) MAX5095_ PIN NAME FUNCTION MAX5095A/ MAX5095B MAX5095C 1 1 COMP Current Limit/PWM Comparator Input. COMP is level-shifted and connected to the inverting input of the PWM comparator. Pull up COMP to REF through a resistor and connect an optocoupler from COMP to GND for proper operation. 2 -- SYNC Bidirectional Synchronization Input. When synchronizing with other MAX5095A/MAX5095Bs, the higher frequency part synchronizes all other devices. -- 2 ADV_CLK 3 3 CS PWM Comparator/Overcurrent Protection Comparator Input. The current-sense signal is compared to the level shifted voltage at COMP. 4 4 RT/CT Timing Resistor/Capacitor Connection. A resistor RT from RT/CT to REF and capacitor CT from RT/CT to GND set the oscillator frequency. 5 5 GND Power-Supply Ground. Place the VCC and REF bypass capacitors close to the IC to minimize ground loops. 6 6 OUT MOSFET Driver Output. OUT connects to the gate of the external n-channel MOSFET. 10 Advance Clock Output. ADV_CLK is an 85ns clock output pulse preceding the rising edge of OUT (see Figure 4). Use the pulse to drive the secondary-side synchronous rectifiers through a pulse transformer or an optocoupler (see Figure 8). 7 7 VCC Power-Supply Input. Bypass VCC to GND with a 0.1F ceramic capacitor or a parallel combination of a 0.1F and a higher value ceramic capacitor. 8 8 REF 5V Reference Output. Bypass REF to GND with a 0.1F ceramic capacitor or a parallel combination of a 0.1F and a higher value ceramic capacitor no larger than 4.7F. ______________________________________________________________________________________ High-Performance, Single-Ended, Current-Mode PWM Controllers MAX5094A/B/C/D/MAX5095A/B/C VP MAX5094_ UVLO 2.5V REFERENCE 2.5V 8.4V/7.6V PREREGULATOR 5V 2.5V 7 VCC THERMAL SHUTDOWN EN-REF 26.5V VDD BG 5V REGULATOR SNS EN-DRV-BAR REG_OK VOLTAGEDIVIDER 8 REF VP DELAY VOLTAGEDIVIDER 1V (MAX5094A/B) 0.3V (MAX5094C/D) ILIM S Q 6 OUT CLK R CS 3 CPWM GND 5 OSC Q 4 RT/CT 2R VEA FB 2 R COMP 1 100% MAX DUTY CYCLE (MAX5094A/MAX5094C) 50% MAX DUTY CYCLE (MAX5094B/MAX5094D) Figure 1. MAX5094_ Functional Diagram Detailed Description The MAX5094_/MAX5095_ current-mode PWM controllers are designed for use as the control and regulation core of flyback or forward topology switching power supplies. These devices incorporate an integrated low-side driver, adjustable oscillator, error amplifier (MAX5094_ only), current-sense amplifier, 5V reference, and external synchronization capability (MAX5095A/MAX5095B only). An internal +26.5V current-limited VCC clamp prevents overvoltage during startup. Eight different versions of the MAX5094/MAX5095 are available as shown in the Selector Guide. The MAX5094A/MAX5094B are the standard versions with a feedback input (FB) and internal error amplifier. The MAX5095A/MAX5095B include bidirectional synchronization (SYNC). This enables multiple MAX5095A/ MAX5095Bs to be connected and synchronized to the device with the highest frequency. The MAX5095C includes an ADV_CLK output, which precedes the MAX5095C's drive output (OUT) by 110ns. Figures 1, 2, and 3 show the internal functional diagrams of the MAX5094_, MAX5095A/MAX5095B, and MAX5095C, respectively. The MAX5094A/MAX5094C/MAX5095A are capable of 100% maximum duty cycle. The MAX5094B/ MAX5094D/MAX5095B/MAX5095C limit the maximum duty cycle to 50%. ______________________________________________________________________________________ 11 MAX5094A/B/C/D/MAX5095A/B/C High-Performance, Single-Ended, Current-Mode PWM Controllers VP MAX5095A MAX5095B UVLO 2.5V REFERENCE 2.5V 8.4V/7.6V PREREGULATOR 5V VOLTAGEDIVIDER 2.5V 7 VCC THERMAL SHUTDOWN EN-REF 26.5V VDD BG 5V REGULATOR SNS EN-DRV-BAR REG_OK 8 REF VP DELAY VOLTAGEDIVIDER 0.3V ILIM S Q 6 OUT CLK R CS 3 CPWM GND 5 OSC Q 100% MAX DUTY CYCLE (MAX5095A) 50% MAX DUTY CYCLE (MAX5095B) 2R COMP 1 4 RT/CT R SYNC 2 BIDIRECTIONAL SYNC Figure 2. MAX5095A/B Functional Diagram Current-Mode Control Loop The advantages of current-mode control over voltagemode control are twofold. First, there is the feed-forward characteristic brought on by the controller's ability to adjust for variations in the input voltage on a cycle-bycycle basis. Secondly, the stability requirements of the current-mode controller are reduced to that of a singlepole system unlike the double pole in the voltage-mode control scheme. 12 The MAX5094/MAX5095 use a current-mode control loop where the output of the error amplifier is compared to the current-sense voltage (VCS). When the current-sense signal is lower than the inverting input of the CPWM comparator, the output of the comparator is low and the switch is turned on at each clock pulse. When the current-sense signal is higher than the inverting input of the CPWM comparator, the output is high and the switch is turned off. ______________________________________________________________________________________ High-Performance, Single-Ended, Current-Mode PWM Controllers MAX5094A/B/C/D/MAX5095A/B/C VP MAX5095C UVLO 2.5V REFERENCE 2.5V 8.4V/7.6V PREREGULATOR 5V 2.5V 7 VCC THERMAL SHUTDOWN EN-REF 26.5V VDD BG 5V REGULATOR SNS EN-DRV-BAR REG_OK VOLTAGEDIVIDER 8 REF VP DELAY VOLTAGEDIVIDER 0.3V ILIM S Q 6 OUT CLK R CS 3 CPWM GND 5 OSC Q 50% MAX DUTY CYCLE 2R 4 RT/CT COMP 1 R ADV_CLK 2 Figure 3. MAX5095C Functional Diagram VCC and Startup In normal operation, VCC is derived from a tertiary winding of the transformer. However, at startup there is no energy delivered through the transformer, thus a resistor must be connected from VCC to the input power source (see RST and CST in Figures 5 to 8). During startup, CST charges up through RST. The 5V reference generator, comparator, error amplifier, oscillator, and drive circuit remain off during UVLO to reduce startup current below 65A. When V CC reaches the undervoltage-lockout threshold of 8.4V, the output driver begins to switch and the tertiary winding supplies power to VCC. VCC has an internal 26.5V current-limited clamp at its input to protect the device from overvoltage during startup. Size the startup resistor, RST, to supply both the maximum startup bias (ISTART) of the device (65A max) and the charging current for CST. The startup capacitor CST must charge to 8.4V within the desired time period t ST (for example, 500ms). The size of the startup capacitor depends on: 1) IC operating supply current at a programmed oscillator frequency (fOSC). 2) The time required for the bias voltage, derived from a bias winding, to go from 0 to 9V. 3) The MOSFET total gate charge. 4) The operating frequency of the converter (fSW). ______________________________________________________________________________________ 13 MAX5094A/B/C/D/MAX5095A/B/C High-Performance, Single-Ended, Current-Mode PWM Controllers To calculate the capacitance required, use the following formula: CST = [ICC + IG ](tSS ) VHYST where: IG = QG fSW ICC is the MAX5094/MAX5095s' maximum internal supply current after startup (see the Typical Operating Characteristics to find the IIN at a given fOSC). QG is the total gate charge for the MOSFET, fSW is the converter switching frequency, VHYST is the bootstrap UVLO hysteresis (0.8V), and tSS is the soft-start time, which is set by external circuitry. Size the resistor RST according to the desired startup time period, tST, for the calculated CST. Use the following equations to calculate the average charging current (ICST) and the startup resistor (RST): V x CST ICST = SUVR t ST VSUVR VINMIN - 2 RST ICST + ISTART Where VINMIN is the minimum input supply voltage for the application (36V for telecom), VSUVR is the bootstrap UVLO wake-up level (8.4V), and ISTART is the VIN supply current at startup (65A, max). Choose a higher value for RST than the one calculated above if longer startup times can be tolerated to minimize power loss in RST. The equation for CST above gives a good approximation of CST, yet neglects the current through RST. Fine tune CST using: V - 8V ICC + IG - INMIN RST CST = (t SS ) VHYST The above startup method is applicable to circuits where the tertiary winding has the same phase as the output windings. Thus, the voltage on the tertiary winding at any given time is proportional to the output voltage and goes through the same soft-start period as the output voltage. 14 The minimum discharge time of CST from 8.4V to 7.6V must be greater than the soft-start time (tSS). Undervoltage Lockout (UVLO) The minimum turn-on supply voltage for the MAX5094/MAX5095 is 8.4V. Once VCC reaches 8.4V, the reference powers up. There is 0.8V of hysteresis from the minimum turn-on voltage to the UVLO threshold. Once VCC reaches 8.4V, the MAX5094/MAX5095 operates with VCC down to 7.6V. Once VCC goes below 7.6V the device is in UVLO. When in UVLO, the quiescent supply current into VCC falls back to 32A (typ), and OUT and REF are pulled low. MOSFET Driver OUT drives an external n-channel MOSFET and swings from GND to VCC. Ensure that VCC remains below the absolute maximum VGS rating of the external MOSFET. OUT is a push-pull output with the on-resistance of the PMOS typically 3.5 and the on-resistance of the NMOS typically 4.5. The driver can source 2A typically and sink 1A typically. This allows for the MAX5094/MAX5095 to quickly turn on and off high gate-charge MOSFETs. Bypass VCC with one or more 0.1F ceramic capacitors to GND, placed close to the MAX5094/MAX5095. The average current sourced to drive the external MOSFET depends on the total gate charge (QG) and operating frequency of the converter. The power dissipation in the MAX5094/MAX5095 is a function of the average outputdrive current (IDRIVE). Use the following equation to calculate the power dissipation in the device due to IDRIVE: IDRIVE = QG x fSW PD = (IDRIVE + ICC) x VCC where, ICC is the operating supply current. See the Typical Operating Characteristics for the operating supply current at a given frequency. Error Amplifier (MAX5094) The MAX5094 includes an internal error amplifier. The inverting input is at FB and the noninverting input is internally connected to a 2.5V reference. The internal error amplifier is useful for nonisolated converter design (see Figure 6) and isolated design with primary-side regulation through a bias winding (see Figure 5). In the case of a nonisolated power supply, the output voltage is: R1 VOUT = 1 + x 2.5V R2 where, R1 and R2 are from Figure 6. ______________________________________________________________________________________ High-Performance, Single-Ended, Current-Mode PWM Controllers Reference Output REF is a 5V reference output that can source 20mA. Bypass REF to GND with a 0.1F capacitor. Oscillator The oscillator frequency is programmed by adding an external capacitor and resistor at RT/CT (see RT and CT in the Typical Application Circuits). RT is connected from RT/CT to the 5V reference (REF) and CT is connected from RT/CT to GND. REF charges CT through RT until its voltage reaches 2.8V. CT then discharges through an 8.3mA internal current sink until CT's voltage reaches 1.1V, at which time C T is allowed to charge through RT again. The oscillator's period will be the sum of the charge and discharge times of CT. Calculate the charge time as tC = 0.57 x RT x CT The discharge time is then tD = RT x CT x 103 4.88 x RT - 1.8 x 103 The oscillator frequency will then be fOSC = 1 t C + tD For the MAX5094A/MAX5094C/MAX5095A, the converter output switching frequency (fSW) is the same as the oscillator frequency (f OSC ). For the MAX5094B/ MAX5094D/MAX5095B/MAX5095C, the output switching frequency is 1/2 the oscillator frequency. Current Limit The MAX5094/MAX5095 include a fast current-limit comparator to terminate the ON cycle during an overload or a fault condition. The current-sense resistor (RCS), connected between the source of the MOSFET and GND, sets the current limit. The CS input has a voltage trip level (V CS ) of 1V (MAX5094A/B) or 0.3V (MAX5094C/D, MAX5095_). Use the following equation to calculate RCS: V RCS = CS IP-P IP-P is the peak current in the primary that flows through the MOSFET. When the voltage produced by this current (through the current-sense resistor) exceeds the currentlimit comparator threshold, the MOSFET driver (OUT) will turn the switch off within 60ns. In most cases, a small RC filter is required to filter out the leading-edge spike on the sense waveform. Set the time constant of the RC filter at 50ns. Use a current transformer to limit the losses in the current-sense resistor and achieve higher efficiency especially at low input-voltage operation. Synchronization (MAX5095A/MAX5095B) SYNC SYNC is a bidirectional input/output that outputs a synchronizing pulse and accepts a synchronizing pulse from other MAX5095A/MAX5095Bs (see Figures 7 and 9). As an output, SYNC is an open-drain p-channel MOSFET driven from the internal oscillator and requires an external pulldown resistor (RSYNC) between 500 and 5k. As an input, SYNC accepts the output pulses from other MAX5095A/MAX5095Bs. Synchronize multiple MAX5095A/MAX5095Bs by connecting their SYNC pins together. All devices connected together will synchronize to the one operating at the highest frequency. The rising edge of SYNC will precede the rising edge of OUT by approximately the discharge time (tD) of the oscillator (see the Oscillator section). The pulse width of the SYNC output is equal to the time required to discharge the stray capacitance at SYNC through RSYNC plus the CT discharge time tD. Adjust RT/CT such that the minimum discharge time tD is 200ns. ______________________________________________________________________________________ 15 MAX5094A/B/C/D/MAX5095A/B/C MAX5095_Feedback The MAX5095A/MAX5095B/MAX5095C use either an external error amplifier when designed into a nonisolated converter or an error amplifier and optocoupler when designed into an isolated power supply. The COMP input is level-shifted and connected to the inverting terminal of the PWM comparator (CPWM). Connect the COMP input to the output of the external error amplifier for nonisolated design. Pull COMP high externally to 5V (or REF) and connect the optocoupler transistor as shown in Figures 7 and 8. COMP can be used for soft-start and also as a shutdown. See the Typical Operating Characteristics to find the turn-off COMP voltage at different temperatures. MAX5094A/B/C/D/MAX5095A/B/C High-Performance, Single-Ended, Current-Mode PWM Controllers Advance Clock Output (ADV_CLK) (MAX5095C) ADV_CLK is an advanced pulse output provided to facilitate the easy implementation of secondary-side synchronous rectification using the MAX5095C. The ADV_CLK pulse width is 85ns (typically) with its rising edge leading the rising edge of OUT by 110ns. Use this leading pulse to turn off the secondary-side synchronous-rectifier MOSFET (QS) before the voltage appears on the secondary (see Figure 8). Turning off the secondary-side synchronous MOSFET earlier avoids the shorting of the secondary in the forward converter. The ADV_CLK pulse can be propagated to the secondary side using a pulse transformer or highspeed optocoupler. The 85ns pulse, with 3V drive voltage (10mA source), significantly reduces the volt-second requirement of the pulse transformer and the advanced pulse alleviates the need for a highspeed optocoupler. RT/CT OUT tADV_CLK = 110ns ADV_CLK tPULSE = 85ns Thermal Shutdown Figure 4. ADV_CLK When the MAX5094/MAX5095's die temperature goes above +150C, the thermal shutdown circuitry will shut down the 5V reference and pull OUT low. Typical Application Circuits VIN RST VOUT CST 1 R1 2 R2 RT 3 4 COMP REF FB MAX5094_ VCC CS OUT RT/CT GND 8 7 6 N 5 CT RCS Figure 5. MAX5094_ Typical Application Circuit (Isolated Flyback with Primary-Side Regulation) 16 ______________________________________________________________________________________ High-Performance, Single-Ended, Current-Mode PWM Controllers VIN RST VOUT CST 1 R1 2 R2 3 RT 4 COMP REF FB MAX5094_ VCC CS OUT RT/CT GND 8 7 6 N 5 CT RCS Figure 6. MAX5094_ Typical Application Circuit (Nonisolated Flyback) VIN RST SYNC INPUT/OUTPUT VOUT CST RSYNC 1 2 RT 3 4 COMP REF SYNC MAX5095A VCC MAX5095B CS OUT RT/CT GND 8 7 6 N 5 CT RCS Figure 7. MAX5095A/MAX5095B Typical Application Circuit (Isolated Flyback) ______________________________________________________________________________________ 17 MAX5094A/B/C/D/MAX5095A/B/C Typical Application Circuits (continued) High-Performance, Single-Ended, Current-Mode PWM Controllers MAX5094A/B/C/D/MAX5095A/B/C Typical Application Circuits (continued) VD VIN VOUT RST N QS CST N QR VD VCC REF RT N OUT MAX5095C RT/CT CS CT RCS COMP ADV_CLK MAX5078 GND 0.5V/s PULSE TRANSFORMER Figure 8. MAX5095C Typical Application Circuit (Isolated Forward with Secondary-Side Synchronous Rectification) 18 ______________________________________________________________________________________ High-Performance, Single-Ended, Current-Mode PWM Controllers VIN VIN VCC REF RT VCC OUT REF RT MAX5095A MAX5095B RT/CT N VCC OUT N N MAX5095A MAX5095B CS CT SYNC GND OUT RT/CT CS CT SYNC REF RT MAX5095A MAX5095B RT/CT CS CT MAX5094A/B/C/D/MAX5095A/B/C VIN SYNC GND GND TO OTHER MAX5095A/Bs RSYNC Figure 9. Synchronization of MAX5095A/MAX5095B ______________________________________________________________________________________ 19 MAX5094A/B/C/D/MAX5095A/B/C High-Performance, Single-Ended, Current-Mode PWM Controllers Selector Guide FEATURE UVLO THRESHOLD (V) CS THRESHOLD (V) MAX DUTY CYCLE (%) COMPETITORS PART NUMBER MAX5094AASA Feedback 8.4 1 100 UCC28C43 2nd source 8 SO MAX5094AAUA Feedback 8.4 1 100 UCC28C43 2nd source 8 MAX MAX5094BASA Feedback 8.4 1 50 UCC28C45 2nd source 8 SO MAX5094BAUA Feedback 8.4 1 50 UCC28C45 2nd source 8 MAX MAX5094CASA Feedback 8.4 0.3 100 Improved UCC28C43 8 SO PART PINPACKAGE MAX5094CAUA Feedback 8.4 0.3 100 Improved UCC28C43 8 MAX MAX5094DAUA Feedback 8.4 0.3 50 Improved UCC28C45 8 MAX MAX5095AAUA Sync 8.4 0.3 100 Improved UCC28C43 8 MAX MAX5095BAUA Sync 8.4 0.3 50 Improved UCC28C45 8 MAX MAX5095CAUA ADV_CLK 8.4 0.3 50 Improved UCC28C45 8 MAX Pin Configurations (continued) TOP VIEW COMP 1 SYNC CS 2 3 MAX5095A MAX5095B RT/CT 4 8 REF COMP 1 7 VCC ADV_CLK 2 7 VCC 6 OUT CS 3 6 OUT 5 GND RT/CT 4 5 GND MAX Ordering Information (continued) TEMP RANGE REF MAX5095C MAX PART 8 PINPACKAGE PKG CODE MAX5094CASA* -40C to +125C 8 SO MAX5094CASA+ -40C to +125C 8 SO S8-4 MAX5094CAUA* -40C to +125C 8 MAX U8-1 MAX5094CAUA+ -40C to +125C 8 MAX U8-1 MAX5094DAUA* -40C to +125C 8 MAX U8-1 MAX5094DAUA+ -40C to +125C 8 MAX U8-1 Chip Information TRANSISTOR COUNT: 1987 PROCESS: BiCMOS S8-4 MAX5095AAUA -40C to +125C 8 MAX U8-1 MAX5095AAUA+* -40C to +125C 8 MAX U8-1 MAX5095BAUA* -40C to +125C 8 MAX U8-1 MAX5095BAUA+ -40C to +125C 8 MAX U8-1 MAX5095CAUA* -40C to +125C 8 MAX U8-1 MAX5095CAUA+ -40C to +125C 8 MAX U8-1 +Denotes lead-free package. *Future product--contact factory for availability. 20 ______________________________________________________________________________________ High-Performance, Single-Ended, Current-Mode PWM Controllers N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS DIM A A1 B C e E H L 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.386 MAX 0.197 0.344 0.394 MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC D A B e C 0-8 A1 L FRONT VIEW SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, .150" SOIC APPROVAL DOCUMENT CONTROL NO. 21-0041 REV. B 1 1 ______________________________________________________________________________________ 21 MAX5094A/B/C/D/MAX5095A/B/C Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 4X S 8 E O0.500.1 8 INCHES DIM A A1 A2 b H c D e E H 0.60.1 1 L 1 0.60.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6 0 0.0207 BSC 8LUMAXD.EPS MAX5094A/B/C/D/MAX5095A/B/C High-Performance, Single-Ended, Current-Mode PWM Controllers MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0 6 0.5250 BSC TOP VIEW A1 A2 e A c b FRONT VIEW L SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 REV. J 1 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. ENGLISH * ???? * ??? * ??? WHAT'S NEW PRODUCTS SOLUTIONS DESIGN APPNOTES SUPPORT BUY COMPANY MEMBERS M axim > P roduc ts > P ower and Battery M anagement P rotec tion and I s olation MAX5094A, MAX5094B, MAX5094C, MAX5094D, MAX5095A, MAX5095B, MAX5095C High-Performance, Single-Ended, C urrent-Mode PWM C ontrollers 1MHz, Single-Ended, Current-Mode PWM Controllers with UCC28C43/UCC28C45-Series Pin Compatibility QuickView Technical Documents Ordering Info More Information All Ordering Information Notes: 1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. 2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. 3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming C onventions. 4. * Some packages have variations, listed on the drawing. "PkgC ode/Variation" tells which variation the product uses. Devices: 1-40 of 40 M AX5094A Fre e Sam ple Buy Pack age : TYPE PINS FOOTPRINT Tem p DRAWING CODE/VAR * RoHS/Le ad-Free ? M aterials Analys is MAX5094AASA+T SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8+4* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094AASA+ SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8+4* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094AASA SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8-4* -40C to +125C RoHS/Lead-Free: No Materials Analysis MAX5094AASA-T SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8-4* -40C to +125C RoHS/Lead-Free: No Materials Analysis MAX5094AAUA-T uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1* -40C to +125C RoHS/Lead-Free: No Materials Analysis MAX5094AAUA+ uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094AAUA+T uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094AAUA uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1* -40C to +125C RoHS/Lead-Free: No Materials Analysis M AX5094B Fre e Sam ple Buy Pack age : TYPE PINS FOOTPRINT DRAWING CODE/VAR * Tem p RoHS/Le ad-Free ? M aterials Analys is MAX5094BASA-T SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8-4* -40C to +125C RoHS/Lead-Free: No Materials Analysis MAX5094BASA+T SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8+4* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094BASA+ SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8+4* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094BASA SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8-4* -40C to +125C RoHS/Lead-Free: No Materials Analysis MAX5094BAUA uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1* -40C to +125C RoHS/Lead-Free: No Materials Analysis MAX5094BAUA+ uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094BAUA+T uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094BAUA-T uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1* -40C to +125C RoHS/Lead-Free: No Materials Analysis M AX5094C Fre e Sam ple Buy Pack age : TYPE PINS FOOTPRINT Tem p DRAWING CODE/VAR * RoHS/Le ad-Free ? M aterials Analys is MAX5094C ASA+ SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8+4* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094C ASA-T SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8-4* -40C to +125C RoHS/Lead-Free: No Materials Analysis MAX5094C ASA SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8-4* -40C to +125C RoHS/Lead-Free: No Materials Analysis MAX5094C ASA+T SOIC ;8 pin;31 mm Dwg: 21-0041B (PDF) Use pkgcode/variation: S8+4* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094C AUA-T uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1* -40C to +125C RoHS/Lead-Free: No Materials Analysis MAX5094C AUA+T uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094C AUA+ uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094C AUA uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1* -40C to +125C RoHS/Lead-Free: No Materials Analysis M AX5094D Fre e Sam ple Buy Pack age : TYPE PINS FOOTPRINT Tem p DRAWING CODE/VAR * RoHS/Le ad-Free ? M aterials Analys is MAX5094DAUA-T uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1* -40C to +125C RoHS/Lead-Free: No Materials Analysis MAX5094DAUA+T uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094DAUA+ uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5094DAUA uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1* -40C to +125C RoHS/Lead-Free: No Materials Analysis M AX5095A Fre e Sam ple Buy Pack age : TYPE PINS FOOTPRINT DRAWING CODE/VAR * Tem p RoHS/Le ad-Free ? M aterials Analys is MAX5095AAUA uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1* -40C to +125C RoHS/Lead-Free: No Materials Analysis MAX5095AAUA+T uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5095AAUA+ uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1* -40C to +125C RoHS/Lead-Free: Lead Free Materials Analysis MAX5095AAUA-T uMAX;8 pin;16 mm Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1* -40C to +125C RoHS/Lead-Free: No Materials Analysis M AX5095B Fre e Sam ple Buy Tem p Pack age : TYPE PINS FOOTPRINT DRAWING CODE/VAR * RoHS/Le ad-Free ? 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