TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 D D D D D D D D D PACKAGE (TOP VIEW) 150-mA Low-Dropout Voltage Regulator Available in 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V, 3.0-V, 3.3-V, 5.0-V Fixed Output and Adjustable Versions Dropout Voltage to 85 mV (Typ) at 150 mA (TPS76550) Ultra-Low 35-A Typical Quiescent Current 3% Tolerance Over Specified Conditions for Fixed-Output Versions Open Drain Power Good 8-Pin SOIC Package Thermal Shutdown Protection NC/FB PG GND EN 1 8 2 7 3 6 4 5 OUT OUT IN IN description This device is designed to have an ultra-low quiescent current and be stable with a 4.7-F capacitor. This combination provides high performance at a reasonable cost. Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 85 mV at an output current of 150 mA for the TPS76550) and is directly proportional to the output current. Additionally, since the PMOS pass element is a voltage-driven device, the quiescent current is very low and independent of output loading (typically 35 A over the full range of output current, 0 mA to 150 mA). These two key specifications yield a significant improvement in operating life for battery-powered systems. This LDO family also features a sleep mode; applying a TTL high signal to EN (enable) shuts down the regulator, reducing the quiescent current to less than 1 A (typ). TPS76533 TPS76533 DROPOUT VOLTAGE vs FREE-AIR TEMPERATURE GROUND CURRENT vs LOAD CURRENT 0 1010 35.0 VO = 3.3 V TA = 25C 34.9 I GND - Ground Current - A V DO - Output Voltage - V VI = 3.2 V IO = 150 mA 10-1 IO = 50 mA IO = 10 mA 10-2 34.8 34.7 34.6 34.5 34.4 34.3 34.2 34.1 10-31 -50 34.0 -25 0 25 50 75 100 125 150 0 TA - Free-Air Temperature - C 25 50 75 100 125 150 IL - Load Current - mA 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 1999, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 1 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 description (continued) Power good (PG) is an active high output, which can be used to implement a power-on reset or a low-battery indicator. The TPS765xx is offered in 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V, 3.0-V, 3.3-V and 5.0-V fixed-voltage versions and in an adjustable version (programmable over the range of 1.25 V to 5.5 V). Output voltage tolerance is specified as a maximum of 3% over line, load, and temperature ranges. The TPS765xx family is available in 8 pin SOIC package. AVAILABLE OPTIONS TJ OUTPUT VOLTAGE (V) PACKAGED DEVICES TYP SOIC (D) 5.0 TPS76550D 3.3 TPS76533D 3.0 TPS76530D 2.8 TPS76528D 2.7 TPS76527D 2.5 TPS76525D 1.8 TPS76518D 1.5 TPS76515D Adjustable 1.25 V to 5.5 V TPS76501D - 40C 40 C to 125 125C C The TPS76501 is programmable using an external resistor divider (see application information). The D package is available taped and reeled. Add an R suffix to the device type (e.g., TPS76501DR). TPS765xx VI 5 IN PG 6 NC/FB IN OUT 0.1 F 4 EN OUT 2 PG 1 7 VO 8 + GND 3 CO 4.7 F 300 m See application information section for capacitor selection details. Figure 1. Typical Application Configuration for Fixed Output Options 2 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 functional block diagram--adjustable version IN EN PG _ + OUT + _ R1 Vref = 1.224 V FB/NC R2 GND External to the device functional block diagram--fixed-voltage version IN EN PG _ + OUT + _ R1 Vref = 1.224 V R2 GND POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 Terminal Functions - SOIC Package TERMINAL NAME NO. I/O DESCRIPTION EN 4 I Enable input FB/NC 1 I Feedback input voltage for adjustable device (no connect for fixed options) GND 3 IN 5 IN OUT Regulator ground I Input voltage 6 I Input voltage 7 O Regulated output voltage OUT 8 O Regulated output voltage PG 2 O PG output absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Input voltage range, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.3 V to 13.5 V Voltage range at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to 16.5 V Maximum PG voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 V Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating tables Output voltage, VO (OUT, FB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 40C to 125C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to 150C ESD rating, HBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV 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. All voltage values are with respect to network terminal ground. DISSIPATION RATING TABLE 1 - FREE-AIR TEMPERATURES PACKAGE D AIR FLOW (CFM) TA < 25C POWER RATING DERATING FACTOR ABOVE TA = 25C TA = 70C POWER RATING TA = 85C POWER RATING 0 568 mW 5.68 mW/C 312 mW 227 mW 250 904 mW 9.04 mW/C 497 mW 361 mW recommended operating conditions MIN MAX Input voltage, VIk 2.7 10 Output voltage range, VO 1.2 5.5 V 0 150 mA - 40 125 C Output current, IO (Note 1) Operating virtual junction temperature, TJ (Note 1) UNIT V k To calculate the minimum input voltage for your maximum output current, use the following equation: VI(min) = VO(max) + VDO(max load). NOTE 1: Continuous current and operating junction temperature are limited by internal protection circuitry, but it is not recommended that the device operate under conditions beyond those specified in this table for extended periods of time. 4 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 electrical characteristics over recommended operating free-air temperature Vi = VO(typ) + 1 V, IO = 10 A, EN = 0 V, CO = 4.7 F (unless otherwise noted) PARAMETER TEST CONDITIONS TPS76501 Output voltage (10 A to 150 mA load) (see Note 2) 5.5 V VO 1.25 V, 5.5 V VO 1.25 V, TJ = 25C TJ = -40C to 125C TPS76515 TJ = 25C, TJ = -40C to 125C, 2.7 V < VIN < 10 V TPS76518 TJ = 25C, TJ = -40C to 125C, 2.8 V < VIN < 10 V TPS76525 TJ = 25C, TJ = -40C to 125C, 3.5 V < VIN < 10 V TPS76527 TJ = 25C, TJ = -40C to 125C, 3.7 V < VIN < 10 V TPS76528 TJ = 25C, TJ = -40C to 125C, 3.8 V < VIN < 10 V TPS76530 TJ = 25C, TJ = -40C to 125C, 4.0 V < VIN < 10 V TPS76533 TJ = 25C, TJ = -40C to 125C, 4.3 V < VIN < 10 V TPS76550 TJ = 25C, TJ = -40C to 125C, 6.0 V < VIN < 10 V 2.7 V < VIN < 10 V 2.8 V < VIN < 10 V 3.5 V < VIN < 10 V 3.7 V < VIN < 10 V 3.8 V < VIN < 10 V 4.0 V < VIN < 10 V 4.3 V < VIN < 10 V 6.0 V < VIN < 10 V MIN TYP 0.97VO 1.03VO 1.455 1.545 1.8 1.746 1.854 2.5 2.425 2.575 2.7 2.619 2.781 2.884 3.0 2.910 3.090 3.3 3.201 3.399 5.0 4.850 5.150 VO + 1 V < VI 10 V, TJ = 25C 0.01 Load regulation IO = 10 A to 150 mA BW = 300 Hz to 50 kHz, CO = 4.7 F, TJ = 25C 0.3% 35 50 VO = 0 V 0.8 Standby current FB input current TPS76501 EN = VI, TJ = -40C to 125C 2.7 V < VI < 10 V PG 1 A 2 Minimum input voltage for valid PG Trip threshold voltage VO decreasing Hysteresis voltage Measured at VO Output low voltage VI = 2.7 V, Leakage current V(PG) = 5 V V 63 V 98 0.5 0.15 EN = 0 V -1 EN = VI -1 0 V dB 1.1 92 IO(PG) = 1mA A nA 0.8 CO = 4.7 F, TJ = 25C A C 2.0 f = 1 kHz, IO = 10 A, IO(PG) = 300A Input current (EN) 1.2 150 Low level enable input voltage Power supply ripple rejection (see Note 2) Vrms 10 FB = 1.5 V High level enable input voltage A %/V 200 Thermal shutdown junction temperature TJ = 25C, 2.7 V < VI < 10 V V 2.8 2.716 Output voltage line regulation (VO/VO) (see Notes 2 and 3) EN = VI, UNIT 1.5 10 A < IO < 150 mA, TJ = 25C IO = 150 mA, TJ = -40C to 125C Output current Limit MAX VO Quiescent current ((GND current)) EN = 0V, (see Note 2) Output noise voltage range, %VO %VO 0.4 V 1 A 1 1 A NOTE: 2. Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum IN voltage 10 V. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 5 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 electrical characteristics over recommended operating free-air temperature Vi = VO(typ) + 1 V, IO = 10 A, EN = 0 V, CO = 4.7 F (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS MIN TYP TPS76528 IO = 150 mA, IO = 150 mA, TJ = 25C TJ = -40C to 125C 190 TPS76530 IO = 150 mA, IO = 150 mA, TJ = 25C TJ = -40C to 125C 160 TPS76533 IO = 150 mA, IO = 150 mA, TJ = 25C TJ = -40C to 125C 140 TPS76550 IO = 150 mA, IO = 150 mA, TJ = 25C TJ = -40C to 125C 85 Dropout voltage g (See Note 4) NOTES: 3. If VO 1.8 V then Vimin = 2.7 V, Vimax = 10 V: Line Reg. (mV) + %V V O If VO 2.5 V then Vimin = VO + 1 V, Vimax = 10 V: Line Reg. (mV) + %V V O V * 2.7 V imax 100 V imax * V O MAX UNIT 330 280 mV 240 150 1000 )1 V 100 range, 1000 4. IN voltage equals VO(Typ) - 100 mV; TPS76501 output voltage set to 3.3 V nominal with external resistor divider. TPS76515, TPS76518, TPS76525, and TPS76527 dropout voltage limited by input voltage range limitations (i.e., TPS76530 input voltage needs to drop to 2.9 V for purpose of this test). Table of Graphs FIGURE vs Load current 2, 3 vs Free-air temperature 4, 5 vs Load current 6, 7 vs Free-air temperature 8, 9 Power supply ripple rejection vs Frequency 10 Output spectral noise density vs Frequency 11 Output impedance vs Frequency 12 Dropout voltage vs Free-air temperature Output voltage Ground current 6 13, 14 Line transient response 15, 17 Load transient response 16, 18 Output voltage vs Time Dropout voltage vs Input voltage Equivalent series resistance (ESR) vs Output current 21 - 24 Equivalent series resistance (ESR) vs Added ceramic capacitance 25, 26 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 19 20 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 TYPICAL CHARACTERISTICS TPS76533 TPS76515 OUTPUT VOLTAGE vs LOAD CURRENT OUTPUT VOLTAGE vs LOAD CURRENT 3.304 1.494 VI = 4.3 V TA = 25C 1.493 VO - Output Voltage - V 3.302 VO - Output Voltage - V VI = 2.7 V TA = 25C 3.300 3.298 3.296 3.294 1.492 1.491 1.490 1.489 1.488 3.292 1.487 0 25 50 75 100 125 150 0 25 50 IL - Load Current - mA 75 100 125 150 IL - Load Current - mA Figure 2 Figure 3 TPS76533 TPS76515 OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 3.310 1.505 VI = 4.3 V 3.305 VI = 2.7 V IO = 10 A IO = 10 A 1.500 VO - Output Voltage - V VO - Output Voltage - V 3.300 3.295 IO = 150 mA 3.290 3.285 3.280 IO = 150 mA 1.495 1.490 1.485 3.275 1.480 3.270 3.265 -50 -25 0 25 50 75 100 125 TA - Free-Air Temperature - C 150 1.475 -50 -25 Figure 4 0 25 50 75 100 125 TA - Free-Air Temperature - C 150 Figure 5 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 7 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 TYPICAL CHARACTERISTICS TPS76533 TPS76515 GROUND CURRENT vs LOAD CURRENT GROUND CURRENT vs LOAD CURRENT 35.0 34.0 VO = 3.3 V TA = 25C VO = 1.5 V TA = 25C 33.9 34.8 I GND - Ground Current - A I GND - Ground Current - A 34.9 34.7 34.6 34.5 34.4 34.3 34.2 34.1 33.8 33.7 33.6 33.5 33.4 33.3 33.2 33.1 34.0 33.0 0 25 50 75 100 125 150 0 25 50 IL - Load Current - mA TPS76533 TPS76515 GROUND CURRENT vs FREE-AIR TEMPERATURE 55 50 50 45 40 35 30 25 20 VO = 3.3 V IO = 150 mA 0 40 35 30 25 20 50 150 45 100 150 VO = 1.5 V IO = 150 mA 15 -50 TA - Free-Air Temperature - C 0 50 Figure 9 POST OFFICE BOX 655303 100 TA - Free-Air Temperature - C Figure 8 8 125 GROUND CURRENT vs FREE-AIR TEMPERATURE 55 10 -50 100 Figure 7 I GND - Ground Current - A I GND - Ground Current - A Figure 6 15 75 IL - Load Current - mA * DALLAS, TEXAS 75265 150 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 TYPICAL CHARACTERISTICS TPS76533 TPS76533 POWER SUPPLY RIPPLE REJECTION vs FREQUENCY OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY 101 Output Spectral Noise Density - V Hz VI = 4.3 V CO = 10 F IO = 150 mA TA = 25C 60 50 40 30 20 10 10.00 10 IO = 150 mA IO = 1 mA 100 10-1 VI = 4.3 V CO = 10 F TA = 25C 10-2 100.00 100 1000.0010000.00 1k 10k 100000.00 100k 1000000.00 1M 10000000.0 10M 100 1k f - Frequency - Hz 10k 100k f - Frequency - Hz Figure 10 Figure 11 TPS76533 OUTPUT IMPEDANCE vs FREQUENCY 101 VI = 4.3 V CO = 10 F TA = 25C Zo - Output Impedance - PSRR - Power Supply Ripple Rejection - dB 70 100 IO = 1 mA 10-1 IO = 150 mA 10-2 10 100 1k 10k 100k 1M f - Frequency - Hz Figure 12 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 9 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 TYPICAL CHARACTERISTICS TPS76550 TPS76533 DROPOUT VOLTAGE vs FREE-AIR TEMPERATURE DROPOUT VOLTAGE vs FREE-AIR TEMPERATURE 100 100 VI = 3.2 V V DO - Output Voltage - V V DO - Output Voltage - V VI = 4.9 V CO = 4.7 F IO = 150 mA 10-1 IO = 50 mA 10-2 IO = 150 mA 10-1 IO = 50 mA IO = 10 mA 10-2 IO = 10 mA 10-3 10-3 -50 -25 0 25 50 75 100 125 150 -50 -25 TA - Free-Air Temperature - C 0 25 50 75 100 125 150 TA - Free-Air Temperature - C Figure 13 Figure 14 TPS76515 TPS76515 LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE VO - Change in Output Voltage - mV VO - Change in Output Voltage - mV 400 CL = 4.7 F TA = 25C 100 50 0 I O - Output Current - mA VI - Input Voltage - V -50 3.7 2.7 0 100 200 300 400 500 600 700 800 900 1000 t - Time - s CL = 4.7 F TA = 25C 200 0 -200 -400 150 0 0 100 200 300 400 500 600 700 800 900 1000 t - Time - s Figure 16 Figure 15 10 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 TYPICAL CHARACTERISTICS TPS76533 TPS76533 LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE VO - Change in Output Voltage - mV VO - Change in Output Voltage - mV 400 CL = 4.7 F TA = 25C 100 50 0 I O - Output Current - mA VI - Input Voltage - V -50 -100 5.3 4.3 0 CL = 4.7 F TA = 25C 200 0 -200 150 0 0 100 200 300 400 500 600 700 800 900 1000 t - Time - s 100 200 300 400 500 600 700 800 900 1000 t - Time - s Figure 18 Figure 17 TPS76533 TPS76501 OUTPUT VOLTAGE vs TIME (AT STARTUP) DROPOUT VOLTAGE vs INPUT VOLTAGE 0.30 IO = 150 mA 3 0.25 2 V DO - Output Voltage - V VO- Output Voltage - V 4 1 Enable Pulse - V 0 4.3 0.20 TA = 125C 0.15 TA = 25C 0.10 TA = -40C 0.05 0 0 100 200 300 400 500 600 700 800 900 1000 t - Time - s 0.00 2.5 3.0 3.5 4.0 4.5 5.0 VI - Input Voltage - V Figure 19 Figure 20 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 11 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 TYPICAL CHARACTERISTICS TYPICAL REGION OF STABILITY TYPICAL REGION OF STABILITY EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT 100.00 102 Region of Instability Maximum ESR ESR - Equivalent Series Resistance - ESR - Equivalent Series Resistance - 100.00 102 10.00 101 Region of Stability VI = 4.3 V CO = 4.7 F VO = 3.3 V TA = 25C 1.00 100 Minimum ESR -1 0.10 10 Region of Instability Maximum ESR Region of Instability 10.00 101 Region of Stability 0 1.00 10 VI = 4.3 V CO = 4.7 F VO = 3.3 V TA = 125C -1 0.10 10 Minimum ESR Region of Instability -2 10 0.01 -2 0.01 10 0 25 50 75 100 125 150 0 25 50 IO - Output Current - mA Figure 21 125 TYPICAL REGION OF STABILITY TYPICAL REGION OF STABILITY EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT 150 2 100 10 ESR - Equivalent Series Resistance - Maximum ESR ESR - Equivalent Series Resistance - 100 Figure 22 100.00 102 Region of Instability 10.00 101 0 1.00 10 VI = 4.3 V CO = 10 F VO = 3.3 V TA = 25C -1 0.10 10 Region of Stability Minimum ESR Region of Instability -2 0.01 10 75 IO - Output Current - mA Maximum ESR Region of Instability 101 Region of Stability 100 VI = 4.3 V CO = 10 F VO = 3.3 V TA = 125C 10-1 Minimum ESR Region of Instability -2 10-2 10 0 25 50 75 100 125 150 0 IO - Output Current - mA 25 50 75 100 125 150 IO - Output Current - mA Figure 23 Figure 24 Equivalent series resistance (ESR) refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO. 12 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 TYPICAL CHARACTERISTICS TYPICAL REGION OF STABILITY TYPICAL REGION OF STABILITY EQUIVALENT SERIES RESISTANCE vs ADDED CERAMIC CAPACITANCE EQUIVALENT SERIES RESISTANCE vs ADDED CERAMIC CAPACITANCE 10.00 101 VI = 4.3 V CO = 4.7 F VO = 3.3 V TA = 25C ESR - Equivalent Series Resistance - ESR - Equivalent Series Resistance - 101 10.00 IO = 150 mA 0 10 1.00 -1 100.10 Minimum ESR Region of Instability -2 100.01 VI = 4.3 V VO = 3.3 V CO = 10 F TA = 25C IO = 150 mA 0 1.00 10 -1 100.10 Minimum ESR Region of Instability -2 100.01 0 0.2 0.4 0.6 0.8 1.0 0 Added Ceramic Capacitance - F 0.4 0.6 0.8 1.0 Added Ceramic Capacitance - F Figure 25 VI 0.2 Figure 26 To Load IN OUT + EN CO GND RL ESR Figure 27. Test Circuit for Typical Regions of Stability (Figures 20 through 23) (Fixed Output Options) Equivalent series resistance (ESR) refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 13 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 APPLICATION INFORMATION The TPS765xx family includes eight fixed-output voltage regulators (1.5 V, 1.8 V, 2.5 V, 2.7 V, 2.8 V, 3.0 V, 3.3 V, and 5.0 V), and an adjustable regulator, the TPS76501 (adjustable from 1.25 V to 5.5 V). device operation The TPS765xx features very low quiescent current, which remains virtually constant even with varying loads. Conventional LDO regulators use a pnp pass element, the base current of which is directly proportional to the load current through the regulator (IB = IC/). The TPS765xx uses a PMOS transistor to pass current; because the gate of the PMOS is voltage driven, operating current is low and invariable over the full load range. Another pitfall associated with the pnp-pass element is its tendency to saturate when the device goes into dropout. The resulting drop in forces an increase in IB to maintain the load. During power up, this translates to large start-up currents. Systems with limited supply current may fail to start up. In battery-powered systems, it means rapid battery discharge when the voltage decays below the minimum required for regulation. The TPS765xx quiescent current remains low even when the regulator drops out, eliminating both problems. The TPS765xx family also features a shutdown mode that places the output in the high-impedance state (essentially equal to the feedback-divider resistance) and reduces quiescent current to 1 A (typ). If the shutdown feature is not used, EN should be tied to ground. Response to an enable transition is quick; regulated output voltage is reestablished in typically 160 s. minimum load requirements The TPS765xx family is stable even at zero load; no minimum load is required for operation. FB - pin connection (adjustable version only) The FB pin is an input pin to sense the output voltage and close the loop for the adjustable option . The output voltage is sensed through a resistor divider network to close the loop as it is shown in Figure 29. Normally, this connection should be as short as possible; however, the connection can be made near a critical circuit to improve performance at that point. Internally, FB connects to a high-impedance wide-bandwidth amplifier and noise pickup feeds through to the regulator output. Routing the FB connection to minimize/avoid noise pickup is essential. external capacitor requirements An input capacitor is not usually required; however, a ceramic bypass capacitor (0.047 F or larger) improves load transient response and noise rejection if the TPS765xx is located more than a few inches from the power supply. A higher-capacitance electrolytic capacitor may be necessary if large (hundreds of milliamps) load transients with fast rise times are anticipated. Like all low dropout regulators, the TPS765xx requires an output capacitor connected between OUT and GND to stabilize the internal control loop. The minimum recommended capacitance value is 4.7 F and the ESR (equivalent series resistance) must be between 300-m and 20-. Capacitor values 4.7 F or larger are acceptable, provided the ESR is less than 20 . Solid tantalum electrolytic, aluminum electrolytic, and multilayer ceramic capacitors are all suitable, provided they meet the requirements described previously. 14 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 APPLICATION INFORMATION external capacitor requirements (continued) TPS765xx 5 VI IN PG 6 NC/FB IN OUT 0.1 F 4 EN OUT 2 PG 1 250 k 7 VO 8 + GND 3 CO 4.7 F 300 m Figure 28. Typical Application Circuit (Fixed Versions) programming the TPS76501 adjustable LDO regulator The output voltage of the TPS76501 adjustable regulator is programmed using an external resistor divider as shown in Figure 29. The output voltage is calculated using: V O ) + Vref R1 R2 1 (1) Where Vref = 1.224 V typ (the internal reference voltage) Resistors R1 and R2 should be chosen for approximately 7-A divider current. Lower value resistors can be used but offer no inherent advantage and waste more power. Higher values should be avoided as leakage currents at FB increase the output voltage error. The recommended design procedure is to choose R2 = 169 k to set the divider current at 7 A and then calculate R1 using: R1 + V V O ref *1 (2) R2 OUTPUT VOLTAGE PROGRAMMING GUIDE TPS76501 VI 0.1 F IN PG 250 k 2.0 V 0.8 V OUTPUT VOLTAGE PG EN OUT VO R1 FB / NC GND R2 CO R1 R2 UNIT 2.5 V 174 169 k 3.3 V 287 169 k 3.6 V 324 169 k 4.0 V 383 169 k 5.0 V 523 169 k 300 m Figure 29. TPS76501 Adjustable LDO Regulator Programming POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 15 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 APPLICATION INFORMATION power-good indicator The TPS765xx features a power-good (PG) output that can be used to monitor the status of the regulator. The internal comparator monitors the output voltage: when the output drops to between 92% and 98% of its nominal regulated value, the PG output transistor turns on, taking the signal low. The open-drain output requires a pullup resistor. If not used, it can be left floating. PG can be used to drive power-on reset circuitry or used as a low-battery indicator. regulator protection The TPS765xx PMOS-pass transistor has a built-in back diode that conducts reverse currents when the input voltage drops below the output voltage (e.g., during power down). Current is conducted from the output to the input and is not internally limited. When extended reverse voltage is anticipated, external limiting may be appropriate. The TPS765xx also features internal current limiting and thermal protection. During normal operation, the TPS765xx limits output current to approximately 0.8 A. When current limiting engages, the output voltage scales back linearly until the overcurrent condition ends. While current limiting is designed to prevent gross device failure, care should be taken not to exceed the power dissipation ratings of the package. If the temperature of the device exceeds 150C(typ), thermal-protection circuitry shuts it down. Once the device has cooled below 130C(typ), regulator operation resumes. power dissipation and junction temperature Specified regulator operation is assured to a junction temperature of 125C; the maximum junction temperature should be restricted to 125C under normal operating conditions. This restriction limits the power dissipation the regulator can handle in any given application. To ensure the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, PD(max), and the actual dissipation, PD, which must be less than or equal to PD(max). The maximum-power-dissipation limit is determined using the following equation: P T max * T J A + D(max) R qJA Where TJmax is the maximum allowable junction temperature RJA is the thermal resistance junction-to-ambient for the package, i.e., 176C/W for the 8-terminal SOIC. TA is the ambient temperature. The regulator dissipation is calculated using: P D + VI * VO I O Power dissipation resulting from quiescent current is negligible. Excessive power dissipation will trigger the thermal protection circuit. 16 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TPS76515, TPS76518, TPS76525, TPS76527 TPS76528, TPS76530, TPS76533, TPS76550, TPS76501 ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS236 - AUGUST 1999 MECHANICAL DATA D (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PIN SHOWN PINS ** 0.050 (1,27) 8 14 16 A MAX 0.197 (5,00) 0.344 (8,75) 0.394 (10,00) A MIN 0.189 (4,80) 0.337 (8,55) 0.386 (9,80) DIM 0.020 (0,51) 0.014 (0,35) 14 0.010 (0,25) M 8 0.244 (6,20) 0.228 (5,80) 0.008 (0,20) NOM 0.157 (4,00) 0.150 (3,81) 1 Gage Plane 7 A 0.010 (0,25) 0- 8 0.044 (1,12) 0.016 (0,40) Seating Plane 0.069 (1,75) MAX 0.010 (0,25) 0.004 (0,10) 0.004 (0,10) 4040047 / B 03/95 NOTES: A. B. C. D. E. All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15). Four center pins are connected to die mount pad. Falls within JEDEC MS-012 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 17 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. 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