SLVS278E - AUGUST 2000 - REVISED MARCH 2003 D Independent Dual-Outputs Operate 180 D D D D D D D D D D D D Out of Phase Wide Input Voltage Range: 4.5-V - 28-V Adjustable Output Voltage Down to 0.9 V Pin-Selectable PWM/SKIP Mode for High Efficiency Under Light Loads Synchronous Buck Operation Allows up to 95% Efficiency Separate Standby Control and Overcurrent Protection for Each Channel Programmable Short-Circuit Protection Low Supply (1 mA) and Shutdown (1 nA) Current Power Good Output High-Speed Error Amplifiers Sequencing Easily Achieved by Selecting Softstart Capacitor Values. 5-V Linear Regulator Power Internal IC Circuitry 30-Pin TSSOP Packaging DBT PACKAGE (TOP VIEW) INV1 FB1 SOFTSTART1 PWM/SKIP CT 5V_STBY GND REF STBY1 STBY2 FLT POWERGOOD SOFTSTART2 FB2 INV2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 LH1 OUT1_u LL1 OUT1_d OUTGND1 TRIP1 VCC TRIP2 VREF5 REG5V_IN OUTGND2 OUT2_d LL2 OUT2_u LH2 description The TPS5120 is a dual channel, high-efficiency synchronous buck controller where the outputs run 180 degrees out of phase, which lowers the input current ripple, thereby reducing the input capacitance cost. The PWM/SKIP pin allows the operating mode to switch from PWM mode to skip mode under light load conditions. The skip mode enables a lower operating frequency and shortens the pulse width to the low-side MOSFET, increasing the efficiency under light load conditions. These two modes, along with synchronous-rectifier drivers, dead time, and very low quiescent current, allow power to be conserved and the battery life to be extended under all load conditions. The 1.5 A (typical) high-side and low-side MOSFET drivers on-chip are designed to drive less expensive N-channel MOSFETs. The resistorless current protection and fixed high-side driver voltage simplify the power supply design and reduce the external parts count. Each channel is independent, offering a separate controller, overcurrent protection, and standby control. Sequencing is flexible and can be tailored by choosing different softstart capacitor values. Other features, such as undervoltage lockout, power good, overvoltage, undervoltage, and programmable short-circuit protection promote system reliability. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright 2002, Texas Instruments Incorporated !" # $%&" !# '%()$!" *!"&+ *%$"# $ " #'&$$!"# '& ",& "& # &-!# #"% &"# #"!*!* .!!"/+ *%$" '$&##0 *&# " &$&##!)/ $)%*& "&#"0 !)) '!! &"&#+ POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 1 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 typical design VI C1 R1 R2 Q1 U1 TPS5120DBT R3 GND C3 1 2 C4 3 4 C5 5 6 7 C6 8 9 10 C7 11 12 C8 13 14 15 R4 LH1 INV1 FB1 OUT1_u LL1 SOFTSTART1 PWM/SKIP CT 5V_STBY R7 OUT1_d OUTGND1 TRIP1 GND Vcc REF TRIP2 STBY1 VREF5 STBY2 REG5V_IN FLT OUTGND2 POWERGOOD OUT2_d LL2 SOFTSTART2 FB2 OUT2_u INV2 LH2 L1 D1 30 29 28 C13 27 26 VO1 Q2 C11 C15 25 R8 R9 24 23 22 21 C16 20 19 18 17 C12 C14 D2 Q3 16 VO2 R10 L2 C10 C15 R5 R6 Figure 1. EVM Typical Design 2 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 Q4 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 functional block diagram SOFTSTART1 SOFTSTART1 PWM Comp. LH1 Skip Comp. _ _ + DLY OUT1_u + LL1 DLY OUT1_d FB1 _ + + INV1 OUTGND1 _ Err Amp. + 0.85 V -(V CT CC _ FLT OVP1 UVLO SIGNAL + Current Protection Trigger STBY1 0.85 V+12% _ - VTRIP1) + _ OSC LSD Trip HSD Trip TRIP1 Current Comp. V CC - VTRIP1 OVP2 STBY2 + V CC 0.85 V+12% V UVP1 + _ CC - VTRIP2 _ Timer 0.85 V -19.4% UVP2 + _ TRIP2 + Phase Inverter HSD Trip _ 0.85 V -19.4% LSD Trip FB2 -(V _ + + INV2 CC + - VTRIP2) OUTGND2 Err Amp. OUT2_d DLY PWM Comp. PWM/SKIP _ + LL2 _ OUT2_u DLY + Skip Comp. LH2 UVLO SIGNAL 0.85 V SOFTSTART2 _ SOFTSTART2 SFT1 SFT2 UVLO Comp. VCC V + 5.0 V _ 5 VREG ref STBY1 _ INV1 + STBY2 REF 0.85 V VREF5 REG5V_IN + 4.5 V PGcomp1 0.85 V-7% POWERGOOD 5V_STBY INV2 GND + _ INV1 PGcomp4 0.85 V +7% + _ INV2 PGcomp3 _ + 0.85 V +7% PGcomp2 0.85 V -7% POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 AVAILABLE OPTIONS PACKAGE TA EVM TSSOP (DBT) TPS5120DBT -40C 40C to 85C TPS5120EVM-151 TPS5120DBTR Terminal Functions TERMINAL NAME CT NO. I/O DESCRIPTION 5 I/O External capacitor from CT to GND for adjusting the triangle oscillator FB1 2 O Feedback output of CH1 error amplifier FB2 14 O Feedback output of CH2 error amplifier GND 7 INV1 1 I Inverting input of the CH1 error amplifier, skip comparator, and OVP1/UVP1 comparator INV2 15 I Inverting input of the CH2 error amplifier, skip comparator, and OVP2/UVP2 comparator LH1 30 I/O Bootstrap capacitor connection for CH1 high-side gate drive LH2 16 I/O Bootstrap capacitor connection for CH2 high-side gate drive LL1 28 I/O Bootstrap this pin low for CH1 high-side gate driving return and output current protection. Connect this pin to the junction of the high-side and low-side FETs for a floating drive configuration. LL2 18 I/O Bootstrap this pin low for CH2 high-side gate driving return and output current protection. Connect this pin to the junction of the high-side and low-side FETs for a floating drive configuration. OUT1_d 27 O Gate drive output for CH1 low-side gate drive OUT2_d 19 O Gate drive output for CH2 low-side gate drive OUT1_u 29 O Gate drive output for CH1 high-side switching FETs OUT2_u 17 O Gate drive output for CH2 high-side switching FETs OUTGND1 26 OUTGND2 20 POWERGOOD 12 O Power good open-drain output. When low, POWERGOOD reports an output fail condition. PG comparators monitor both SMPS's over voltage and UVLO of VREF5. The threshold is 7%. When the SMPS starts up, the POWERGOOD pin's output goes high. POWERGOOD also monitors VREF5's UVLO output. PWM/SKIP 4 I PWM/SKIP mode select pin. The PWM/SKIP pin is used to change the output's operating mode. If this terminal is lower than 0.5 V, it works in PWM mode. When a minimum voltage of 2 V is applied, the device operates in skip mode. In light load condition (< 0.2 A), the skip mode gives a short pulse to the low-side FETs instead of a full pulse. With this control, switching frequency is lowered and switching loss is reduced. Also, the output capacitor energy discharging through the output inductor and low-side FETs is stopped. Therefore, TPS5120 achieves a higher efficiency in light load conditions. REF 8 O 0.85-V reference voltage output. The 0.85-V reference voltage is used for setting the output voltage and the voltage protection. This reference voltage is dropped down from a 5-V regulator. REG5V_IN 21 I External 5-V input FLT 11 I/O Fault latch timer pin. An external capacitor is connected between FLT and GND to set the FLT enable time up. SOFTSTART1 3 I/O External capacitor from SOFTSTART1 to GND for CH1 softstart control. Separate soft-start terminals make it possible to set the start-up time of each output independently. SOFTSTART2 13 I/O External capacitor from SOFTSTART2 to GND for CH2 softstart control. Separate soft-start terminals make it possible to set the start-up time of each output independently. STBY1 9 I Standby control for CH1. SMPS1 can be switched into standby mode separately by grounding the STBY1 pin. STBY2 10 I Standby control for CH2. SMPS2 can be switched into standby mode separately by grounding the STBY2 pin. TRIP1 25 I External resistor connection for CH1 output current control 4 Control GND Ground for CH1 FET drivers Ground for CH2 FET drivers POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 Terminal Functions (Continued) TERMINAL NAME NO. I/O I DESCRIPTION TRIP2 23 External resistor connection for CH2 output current control VCC VREF5 24 22 O 5-V internal regulator output 5V_STBY 6 I 5-V linear regulator control Supply voltage input detailed description switching-mode power supply (SMPS) 1, 2 TPS5120 includes dual SMPS controllers that operate 180 out of phase and at the same frequency. Both channels have standby and softstart. 5-V regulator An internal linear voltage regulator is used for the high-side driver bootstrap voltage and source of VREF (0.85 V). When the 5-V regulator is disconnected from the MOSFET drivers, it is only used for the source of VREF. Since the input voltage range is from 4.5 V to 28 V, this feature offers a fixed voltage for the bootstrap voltage so that the drive design is much easier. It is also used for powering the low-side driver. The tolerance is 4%. The 5-V regulator is disabled when STBY1, STBY2, and 5V_STBY are all set low. 5-V switch If the internal 5-V switch senses the 5-V input from the REG5V_IN pin, the internal 5-V linear regulator is disconnected from the MOSFET drivers. The external 5 V is then used for both the low-side driver and the high-side bootstrap, thus, increasing the efficiency. error amplifier Each channel has its own error amplifier to regulate the output voltage of the synchronous buck converter. It is used in the PWM mode for the high output current condition (> 0.2 A). The unity gain bandwidth is 2.5 MHz. This decreases the amplifier delay during fast load transients and contributes to a fast transient response. skip comparator In skip mode, each channel has its own hysteretic comparator to regulate the output voltage of the synchronous buck converter. The hysteresis is set internally and is typically set at 9 mV. The delay from the comparator input to the driver output is typically 1.2 s. low-side driver The low-side driver is designed to drive low rds(on) N-channel MOSFETs. The maximum drive voltage is 5 V from VREF5. The current rating of the driver is typically 1.5 A at source and sink. high-side driver The high-side driver is designed to drive low rds(on) N-channel MOSFETs. The current rating of the driver is 1.2 A at source and sink. When configured as a floating driver, the bias voltage to the driver is developed from VREF5, limiting the maximum drive voltage between OUTx_u and LLx to 5 V. The maximum voltage that can be applied between LHx and OUTGND is 33 V. deadtime Deadtime prevents shoot through current from flowing through the main power FETs during switching transitions by actively controlling the turnon time of the MOSFETs drivers. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 5 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 detailed description (continued) current protection Overcurrent protection is achieved by comparing the drain-to-source voltage of the high-side and low-side MOSFET devices to a set-point voltage. This voltage is set using an external resistor between VCC and the TRIP1 or TRIP2 terminals. If the drain-to-source voltage up exceeds the set-point voltage during high-side conduction, the current limit circuit terminates the high-side driver pulse. If the set-point voltage is exceeded during low-side conduction, the low-side pulse is extended through the next cycle. Together this action has the effect of decreasing the output voltage until the undervoltage protection circuit is activated and the fault latch is set and both the high and low-side MOSFET drivers are shut off. overvoltage protection For overvoltage protection (OVP), the TPS5120 monitors INV pin voltage. When the INV voltage is higher than 0.95 V (+12%), the OVP comparator output goes high and the FLT timer starts to charge an external capacitor connected to FLT. After a set time, the FLT circuit latches the MOSFET drivers off. undervoltage protection For undervoltage protection (UVP), the TPS5120 monitors INV pin voltage. When the INV voltage is lower than 0.68 V (-19.4%), the OVP comparator output goes high, and the FLT timer starts to charge an external capacitor connected to FLT. Also, when the current comparator triggers the OCP, the UVP comparator detects the under voltage output and starts the FLT capacitor charge. After a set time, the FLT circuit latches off all of the MOSFET drivers. FLT When an OVP or UVP comparator output goes high, the FLT circuit starts to charge the FLT capacitor. If the FLT pin voltage goes beyond a constant level, the TPS5120 latches the MOSFET drivers. At this time, the state of MOSFET is different depending on the OVP alert and the UVP alert. Also, the enable time used to latch the MOSFET driver is decided by the capacity of the FLT capacitor. The charging constant current value is also different depending on whether it is an OVP alert or a UVP alert. The difference is shown in the following equation: FLT source current (OVP) = FLT source current (UVP) x 5 shutdown The TPS5120 can be shut down by grounding STBY1, STBY2, and 5V_STBY. The shutdown current is as low as 1 A. UVLO When the input voltage goes up to about 4 V, the TPS5120 is operational. When the input voltage is lower than the turnon value, the device is turned off. The typical hysteresis voltage is 40 mV. phase Inverter Phase inverter controls the phase of SMPS1 and SMPS 2. SMPS1 operates in phase with the OSC. SMPS2 operates 180 out of phase from SMPS1. This allows smaller input capacitors to be used. oscillator TPS5120 has a triangle oscillator generator internal to the IC. The oscillation frequency is set by the size of the capacitor connected to the CT pin. The voltage amplitude is 0.43 V ~ 1.17 V. 6 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 Table 1. Logic Chart 5V_STBY STBY1 STBY2 SMPS1 SMPS2 5 V REGULATOR POWERGOOD L L L L Disable Disable Disable L H Disable Enable Enable Disable Active L H L Enable Disable Enable Active L H H Enable Enable Enable Active H L L Disable Disable Enable L H L H Disable Enable Enable H H L Enable Disable Enable Active Active H Enable Enable Enable Active H H PG is set high during a softstart. POWERGOOD timing sequence TSS H POWERGOOD L H STBY1 L H STBY2 L 0.91 V 0.85 V 0.78 V INV1 0V 0.91 V INV2 0.85 V 0.78 V 0V During a softstart, this channel's powergood comparator output is fixed low (POWERGOOD output is high). POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 7 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 absolute maximum ratings over operating free-air temperature (unless otherwise noted) Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to 30 V Input voltage: INV1, INV2, CT, PWM/SKIP, REG5V_IN, SOFTSTART1, SOFTSTART2, . . . . . -0.3 V to 7 V FLT, POWERGOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to 7 V STBY1, STBY2, 5V_STBY, TRIP1, TRIP2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to 30 V Output voltage: LL1, LL2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.0 V to 30 V OUT1_u, OUT2_u . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.0 V to 35 V LH1, LH2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to 35 V OUT1_d, OUT2_d, 5V_OUT, FB1, FB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to 7 V REF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to 3 V OUT1_u, LH1 to LL1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to 7 V OUT2_u, LH2 to LL2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to 7 V Power dissipation (TA 25C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 874 mW Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to 85C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55C to 150C 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 under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltage values are with respect to the network ground terminal unless otherwise noted. 2. This rating is specified at duty = 10% on output rise and fall each pulse. Each pulse width (rise and fall) for the peak current should not exceed 2 s. 3. See Dissipation Rating Table for free-air temperature range above 25C. DISSIPATION RATING TABLE PACKAGE TA 25C POWER RATING DBT 874 mW DERATING FACTOR ABOVE TA = 25C 6.993 mW/C POWER DISSIPATION TA = 85C 454 mW recommended operating conditions MIN Supply voltage, VCC NOM 28 -0.1 5.5 INV1, INV2, CT, PWM/SKIP, SOFTSTART1, SOFTSTART2, FLT REG5V_IN, POWERGOOD Input In ut voltage, VI STBY1, STBY2, 5V_STBY 28 OUT1_u, OUT2_u, LH1, LH2 33 TRIP1, TRIP2 -0.1 -40 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 V V 28 300 Operating free-air temperature range, TA UNIT 6 Oscillator frequency, fosc 8 MAX 4.5 500 kHz 85 C SLVS278E - AUGUST 2000 - REVISED MARCH 2003 electrical characteristics over recommended free-air temperature range, VCC = 7 V (unless otherwise noted) reference voltage PARAMETER Vref TEST CONDITIONS MIN Reference voltage TYP MAX 0.85 V I = 50 A -1% 1% Reference voltage tolerance TA = 25C, TA = -20C to 85C, I = 50 A -1.5% 1.5% I = 50 A -2% R(egin) Line regulation TA = -40C to 85C, VCC = 4.5 V to 28 V, R(egl) Load regulation I = 0.1 A to 1 mA Vref(tol) I = 50 A UNIT 2% 0.05 3 mV 0.15 5 mV TYP MAX oscillator PARAMETER fosc Frequency TEST CONDITIONS PWM mode, DC VOH High le level el o output tp t voltage oltage VOL Lo le Low level el o output tp t voltage oltage MIN TA = 25 C CT = 44 pF, 300 1 fosc = 300 kHz DC 1.1 kHz 1.2 V 1.17 0.4 fosc = 300 kHz 0.5 UNIT 0.6 V 0.43 error amplifier PARAMETER VIO TEST CONDITIONS Input offset voltage MIN TA = 25C Open-loop voltage gain MAX 2 10 50 Unity-gain bandwidth I(snk) I(src) TYP Output sink current VO = 1 V VO = 1 V Output source current UNIT mV dB 2.5 MHz 0.3 0.7 mA 0.2 0.9 mA MIN TYP skip comparator PARAMETER Vhys TEST CONDITIONS Hysteresis window SKIP mode MAX 9 UNIT mV duty control PARAMETER DUTY TEST CONDITIONS Maximum duty cycle 300 kHz, MIN VI = 0 V TYP MAX UNIT MAX UNIT 83% control PARAMETER VIH High le el inp High-level inputt voltage oltage VIL Lo le el inp Low-level inputt voltage oltage TEST CONDITIONS MIN STBY1, STBY2 2.2 PWM/SKIP, 5V_STBY 2.2 TYP V STBY1, STBY2 0.3 PWM/SKIP, 5V_STBY 0.3 V 5-V internal switch PARAMETER V(TO_H) V(TO_L) Threshold Vhys Hysteresis TEST CONDITIONS POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 MIN TYP MAX 4.2 4.8 4.1 4.7 30 200 UNIT V mV 9 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 electrical characteristics over recommended free-air temperature range, VCC = 7 V (unless otherwise noted) (continued) 5-V regulator PARAMETER IO = 0 mA to 50 mA, TA = 25C VCC = 5.5 V to 28 V, Load regulation VCC = 5.5 V to 28 V, I = 1 mA to 10 mA, Short circuit output current 5VREG = 0 V, VO Output voltage R(egin) Line regulation R(egl) IOS V(TO_H) V(TO_L) Vhys TEST CONDITIONS UVLO threshold voltage 5V OUT voltage 5V_OUT Hysteresis 5V_OUT voltage MIN TYP 4.8 MAX UNIT 5.2 V I =10 mA 20 mV VCC = 5.5 V TA = 25C 40 mV 65 mA 3.6 4.2 3.5 4.1 30 150 mV MAX UNIT V output drivers PARAMETER TEST CONDITIONS OUT_u sink current VO = 3 V VO = 2 V OUT_u source current OUT_d sink current I(TRIP) MIN TYP 1.2 A -1.5 A 1.5 A OUT_d source current VO = 3 V VO = 2 V TRIP pin current TA = 25C 11.5 13 14.5 A TEST CONDITIONS MIN TYP MAX UNIT 1.6 2.3 2.9 -1.5 A soft start PARAMETER I(SOFT) V(TO_H) V(TO_L) Soft start current A 3.7 Threshold voltage (SKIP mode) V 2.5 output voltage monitor PARAMETER TEST CONDITIONS MIN TYP MAX UNIT OVP comparator threshold 0.91 0.95 0.99 V UVP comparator threshold 0.64 0.68 0.72 V PG comparator 1, 2 threshold 0.75 0.78 0.81 V 0.88 0.91 0.94 V PG comparator 3, 4 threshold PG propagation delay dela from INV to POWERGOOD Timer latch current source Turnon 13 Turnoff 1.2 ss UVP protection 1.5 2.3 3.1 OVP protection 8 11.5 15 MIN TYP MAX 1.1 1.5 mA 0.001 10 A A A supply current PARAMETER ICC ICC(S) 10 Supply current Shutdown current TEST CONDITIONS TA = 25C, CT = 0 V, INV = 0 V STBY 1, STBY2, 5V_STBY = 0 V POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 UNIT SLVS278E - AUGUST 2000 - REVISED MARCH 2003 TYPICAL CHARACTERISTICS QUIESCENT CURRENT vs JUNCTION TEMPERATURE QUIESCENT CURRENT (SHUTDOWN) vs JUNCTION TEMPERATURE 1200 1.25 VCC = 28 V Icc(s) - Quiescent Current - nA Icc - Quiescent Current - mA 1.30 1.20 1.15 1.10 VCC = 4.5 V VCC = 7 V 1.05 -50 0 50 100 TJ - Junction Temperature - C 1000 VCC = 28 V 800 VCC = 7 V 600 400 VCC = 4.5 V 200 0 -50 150 0 50 100 TJ - Junction Temperature - C Figure 2 Figure 3 DRIVE OUTPUT CURRENT (OUT_u) vs DRIVE OUTPUT VOLTAGE DRIVE OUTPUT CURRENT (OUT_u) vs DRIVE OUTPUT VOLTAGE 1.50 I O(SINK) - Drive Output Current (OUT_u) - A I O(SOURCE)- Drive Output Current (OUT_u) - A -1.80 TJ = -40 C -1.70 -1.60 -1.50 -1.40 -1.30 TJ = 25 C -1.20 TJ = 85 C -1.10 TJ = 125 C -1.00 -0.90 -0.80 0.5 150 TJ = -20 C 1 1.5 2 2.5 3 3.5 VO - Drive Output Voltage (OUT_u) - V 1.40 TJ = -40 C 1.30 1.20 1.10 1.00 0.90 TJ = 85 C 0.80 0.70 0.60 1.5 TJ = -20 C TJ = 25 C TJ = 125 C 2.5 3.5 2 3 4 VO - Drive Output Voltage (OUT_u) - V Figure 4 4.5 Figure 5 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 11 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 TYPICAL CHARACTERISTICS DRIVE OUTPUT CURRENT (OUT_d) vs DRIVE OUTPUT VOLTAGE 1.80 -2.00 TJ = -40 C I O(SINK) - Drive Output Current (OUT_d) - A I O(SOURCE) - Drive Output Current (OUT_d) - A DRIVE OUTPUT CURRENT (OUT_d) vs DRIVE OUTPUT VOLTAGE TJ = -20 C -1.80 TJ = 25 C -1.60 -1.40 -1.20 -1.00 -0.80 0.5 TJ = 85 C TJ = 125 C 1.5 2.5 2 3 VO - Drive Output Voltage (OUT_d) - V 1 1.70 TJ = -40 C 1.60 1.50 1.40 1.30 1.20 1.00 2.5 3 3.5 4 4.5 Figure 7 OSCILLATOR OUTPUT VOLTAGE vs JUNCTION TEMPERATURE 1.20 500 V(OSCL) - Oscillator Output Voltage - mV V - Oscillator Output Voltage - V (OSCH) 2 TJ = 125 C VO - Drive Output Voltage (OUT_d) - V OSCILLATOR OUTPUT VOLTAGE vs JUNCTION TEMPERATURE 1.18 1.16 1.14 1.12 1.10 1.08 VCC = 4.5 V, VCC = 7 V, VCC = 28 V 1.06 1.04 1.02 0 50 100 TJ - Junction Temperature - C 150 VCC = 4.5 V, VCC = 7 V, VCC = 28 V 495 490 485 480 -50 Figure 8 12 TJ = 25 C 0.90 Figure 6 1.00 -50 TJ = 85 C 1.10 0.80 1.5 3.5 TJ = -20 C 0 50 100 TJ - Junction Temperature - C Figure 9 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 150 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 TYPICAL CHARACTERISTICS ERROR AMPLIFIER OUTPUT VOLTAGE vs JUNCTION TEMPERATURE ERROR AMPLIFIER INPUT OFFSET VOLTAGE vs JUNCTION TEMPERATURE VO+ - Positive Error Amplifier Output Voltage - V V IO - Error Amplifier Input Offset Voltage - mV 2.55 2.50 VCC = 28 V 2.45 2.40 2.35 2.30 VCC = 4.5 V, VCC = 7 V 2.25 2.20 -50 0 50 100 TJ - Junction Temperature - C 150 3.00 VCC = 4.5 V, VCC = 7 V, VCC = 28 V 2.75 2.50 2.25 2.00 1.75 1.50 -50 0 50 100 TJ - Junction Temperature - C Figure 10 Figure 11 SKIP COMPARATOR HYSTERESIS VOLTAGE vs JUNCTION TEMPERATURE 8.0 V - Skip Comparator Hysteresis Voltage - mV hys VO- - Negative Error Amplifier Output Voltage - mV ERROR AMPLIFIER OUTPUT VOLTAGE vs JUNCTION TEMPERATURE 7.0 VCC = 4.5 V, VCC = 7 V, VCC = 28 V 6.0 5.0 4.0 3.0 2.0 1.0 0.0 -50 150 0 50 100 TJ - Junction Temperature - C 150 9.0 8.8 VCC = 28 V VCC = 7 V 8.6 8.4 8.2 8.0 7.8 7.6 VCC = 4.5 V 7.4 7.2 7.0 -50 Figure 12 0 50 100 TJ - Junction Temperature - C 150 Figure 13 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 13 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 TYPICAL CHARACTERISTICS VREF5 SHORT-CIRCUIT OUTPUT CURRENT vs JUNCTION TEMPERATURE VREF5 OUTPUT VOLTAGE vs OUTPUT CURRENT -120 5.20 - VREF5 Short-Circuit Output Current - mA OS TJ = 125 C VO - VREF5 Output Voltage - V 5.10 5.00 4.90 TJ = 85 C 4.80 4.70 TJ = 25 C 4.60 TJ = -40 C -80 VCC = 28 V -60 -40 -20 VCC = 7 V VCC = 4.5 V I TJ = -20 C -100 4.50 0 -10 -20 -30 -40 -50 I O - Output Current - mA 0 -50 -60 UVLO HYSTERESIS VOLTAGE vs JUNCTION TEMPERATURE UVLO THRESHOLD VOLTAGE vs JUNCTION TEMPERATURE 140 Vhys - UVLO Hysteresis Voltage - mV V(TO) - UVLO Threshold Voltage - V 4.00 V(TO_H) 3.90 3.80 V(TO_L) 3.60 3.50 -50 120 100 80 60 40 20 0 0 50 100 TJ - Junction Temperature - C 150 -50 Figure 16 14 150 Figure 15 Figure 14 3.70 0 50 100 TJ - Junction Temperature - C 0 50 100 TJ - Junction Temperature - C Figure 17 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 150 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 TYPICAL CHARACTERISTICS REG5V_IN HYSTERESIS VOLTAGE vs JUNCTION TEMPERATURE REG5V_IN THRESHOLD VOLTAGE vs JUNCTION TEMPERATURE 140 4.7 Vhys - REG5V_IN Hysteresis Voltage - mV V(TO) - REG5V_IN Threshold Voltage - V 4.7 V(TO_L) 4.6 4.6 4.5 V(TO_H) 4.5 4.4 -50 0 50 100 TJ - Junction Temperature - C 120 100 80 60 40 20 0 -50 150 Figure 18 OVP THRESHOLD VOLTAGE vs JUNCTION TEMPERATURE -2.30 956 V(TO) - OVP Threshold Voltage - mV -2.28 -2.26 Softstart Current - A 150 Figure 19 SOFTSTART CURRENT vs JUNCTION TEMPERATURE -2.24 VCC = 7 V, VCC = 28 V -2.22 -2.20 -2.18 -2.16 0 50 100 TJ - Junction Temperature - C VCC = 4.5 V -2.14 954 VCC = 7 V, VCC = 28 V 952 950 VCC = 4.5 V 948 946 -2.12 -2.10 -50 0 50 100 TJ - Junction Temperature - C 150 944 -50 Figure 20 0 50 100 TJ - Junction Temperature - C 150 Figure 21 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 15 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 TYPICAL CHARACTERISTICS SCP (OVP) SOURCE CURRENT vs JUNCTION TEMPERATURE POWERGOOD THRESHOLD VOLTAGE vs JUNCTION TEMPERATURE -12.0 900 875 -11.9 V(TO_H) 925 SCP (OVP) Source Current - A V(TO) - Powergood Threshold Voltage - mV 950 VCC = 4.5 V, VCC = 7 V, VCC = 28 V 850 825 VCC = 4.5 V, VCC = 7 V, VCC = 28 V 800 775 750 -50 -11.8 VCC = 7 V, VCC = 28 V -11.7 -11.6 -11.5 -11.4 -11.3 VCC = 4.5 V -11.2 -11.1 V(TO_L) 0 50 100 -11.0 -50 150 0 50 100 TJ - Junction Temperature - C TJ - Junction Temperature - C Figure 23 Figure 22 TRIP SINK CURRENT vs TRIP INPUT VOLTAGE SCP (OVP) SOURCE CURRENT vs JUNCTION TEMPERATURE 14.0 13.8 VCC = 7 V, VCC = 28 V I(SINK) - TRIP Sink Current - A I (SOURCE) - SCP (OVP) Source Current - A -2.40 -2.38 -2.35 -2.33 -2.30 -2.28 VCC = 4.5 V -2.25 -2.23 -2.20 -50 TJ = 125 C TJ = 85 C 13.6 13.4 13.2 TJ = 25 C 13.0 12.8 TJ = -20 C 12.6 TJ = -40 C 12.4 12.2 12.0 0 50 100 TJ - Junction Temperature - C 150 0 4 8 12 16 Figure 25 POST OFFICE BOX 655303 20 24 VI - TRIP Input Voltage - V Figure 24 16 150 * DALLAS, TEXAS 75265 28 32 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 TYPICAL CHARACTERISTICS OUTPUT MAXIMUM DUTY CYCLE vs JUNCTION TEMPERATURE OSCILLATOR FREQUENCY vs CAPACITANCE 85.0 VCC = 7 V, TJ = 25 C Output Maximum Duty Cycle - % f OSC - Oscillator Frequency - kHz 1000 100 VCC = 7 V, VCC = 28 V 84.5 84.0 83.5 83.0 VCC = 4.5 V 82.5 82.0 81.5 fosc = 300 kHz 10 0 81.0 50 100 150 200 CT - Capacitance - pF -50 250 Figure 26 150 Figure 27 SOFTSTART TIME vs SOFTSTART CAPACITANCE SCP DELAY TIME vs CAPACITANCE 100 k 100 k 10 k 10 k t - Softstart Time - s td(SCP) - SCP Delay Time (OVP) - s 0 50 100 TJ - Junction Temperature - C 1k 100 1k 100 10 1 10 100 1k 10 k SCP - Capacitance - pF 100 k 10 100 1k 10 k Softstart Capacitance - pF 100 k Figure 29 Figure 28 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 17 SLVS278E - AUGUST 2000 - REVISED MARCH 2003 TYPICAL CHARACTERISTICS DRIVER DEAD TIME (OUT_u FALL) vs JUNCTION TEMPERATURE DRIVER DEAD RISE TIME (OUT_u RISE) vs JUNCTION TEMPERATURE 175.0 100 Driver and Dead Rise Time (OUT_u RISE) VCC = 4.5 V Driver Dead Time - ns 172.5 170.0 167.5 165.0 162.5 -50 VCC = 7 V, VCC = 28 V 0 50 100 TJ - Junction Temperature - C 150 95 90 VCC = 7 V, VCC = 28 V 85 80 75 70 -50 Figure 30 18 VCC = 4.5 V 0 50 TJ - Junction Temperature - C Figure 31 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 100 PACKAGE OPTION ADDENDUM www.ti.com 18-Sep-2008 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty TPS5120DBT ACTIVE TSSOP DBT 30 60 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR TPS5120DBTG4 ACTIVE TSSOP DBT 30 60 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR TPS5120DBTR ACTIVE TSSOP DBT 30 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR TPS5120DBTRG4 ACTIVE TSSOP DBT 30 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. 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