TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 D D D D D D D D D 1 A 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 Down to 230 mV at 1 A (TPS76850) Ultra Low 85 A Typical Quiescent Current Fast Transient Response 2% Tolerance Over Specified Conditions for Fixed-Output Versions Open Drain Power Good (See TPS767xx for Power-On Reset With 200-ms Delay Option) 8-Pin SOIC and 20-Pin TSSOP (PWP) Package Thermal Shutdown Protection PWP PACKAGE (TOP VIEW) GND/HSINK GND/HSINK GND NC EN IN IN NC GND/HSINK GND/HSINK 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 GND/HSINK GND/HSINK NC NC PG FB/NC OUT OUT GND/HSINK GND/HSINK NC - No internal connection D PACKAGE (TOP VIEW) description GND EN IN IN This device is designed to have a fast transient response and be stable with 10-F low ESR capacitors. This combination provides high performance at a reasonable cost. TPS76833 DROPOUT VOLTAGE vs FREE-AIR TEMPERATURE 1 8 2 7 3 6 4 5 PG FB/NC OUT OUT LOAD TRANSIENT RESPONSE 103 VO - Change in Output Voltage - mV 100 IO = 1 A 102 101 I O - Output Current - A VDO - Dropout Voltage - mV 1 IO = 10 mA 100 10-1 IO = 0 CO = 10 F 10-2 -60 -40 -20 0 20 40 60 80 100 120 140 TA - Free-Air Temperature - C CL = 10 F TA = 25C 50 0 -50 -100 1 0.5 0 0 20 40 60 80 100 120 140 160 180 200 t - Time - s 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 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 description (continued) Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 230 mV at an output current of 1 A for the TPS76850) 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 85 A over the full range of output current, 0 mA to 1 A). 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 at TJ = 25C. Power good (PG) is an active high output, which can be used to implement a power-on reset or a low-battery indicator. The TPS768xx 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 1.2 V to 5.5 V). Output voltage tolerance is specified as a maximum of 2% over line, load, and temperature ranges. The TPS768xx family is available in 8 pin SOIC and 20 pin PWP packages. AVAILABLE OPTIONS OUTPUT VOLTAGE (V) TJ - 40C 40 C to 125 125C C PACKAGED DEVICES TYP TSSSOP (PWP) SOIC (D) 5.0 TPS76850Q TPS76850Q 3.3 TPS76833Q TPS76833Q 3.0 TPS76830Q TPS76830Q 2.8 TPS76828Q TPS76828Q 2.7 TPS76827Q TPS76827Q 2.5 TPS76825Q TPS76825Q 1.8 TPS76818Q TPS76818Q 1.5 TPS76815Q TPS76815Q Adjustable 1.2 V to 5.5 V TPS76801Q TPS76801Q The TPS76801 is programmable using an external resistor divider (see application information). The D and PWP packages are available taped and reeled. Add an R suffix to the device type (e.g., TPS76801QDR). TPS768xx VI 6 IN PG 16 PG 7 IN OUT 0.1 F 5 EN OUT 14 VO 13 + GND CO 10 F 3 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 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 functional block diagram--adjustable version IN EN PG _ + OUT + _ R1 Vref = 1.1834 V FB/NC R2 GND External to the device functional block diagram--fixed-voltage version IN EN PG _ + OUT + _ R1 Vref = 1.1834 V R2 GND POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 Terminal Functions - SOIC Package TERMINAL NAME NO. I/O DESCRIPTION GND 1 Regulator ground EN 2 I Enable input IN 3 I Input voltage IN 4 I Input voltage OUT 5 O Regulated output voltage OUT 6 O Regulated output voltage FB/NC 7 I Feedback input voltage for adjustable device (no connect for fixed options) PG 8 O PG output Terminal Functions - PWP Package TERMINAL NAME NO. I/O DESCRIPTION GND/HSINK 1 Ground/heatsink GND/HSINK 2 Ground/heatsink GND 3 LDO ground NC 4 No connect EN 5 I Enable input IN 6 I Input IN 7 I Input NC 8 No connect GND/HSINK 9 Ground/heatsink GND/HSINK 10 Ground/heatsink GND/HSINK 11 Ground/heatsink GND/HSINK 12 Ground/heatsink OUT 13 O Regulated output voltage OUT 14 O Regulated output voltage FB/NC 15 I Feedback input voltage for adjustable device (no connect for fixed options) PG 16 O PG output NC 17 No connect NC 18 No connect GND/HSINK 19 Ground/heatsink GND/HSINK 20 Ground/heatsink 4 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 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 VI + 0.3 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 0 568.18 mW 250 904.15 mW 5.6818 mW/C 312.5 mW 227.27 mW 9.0415 mW/C 497.28 mW 361.66 mW DISSIPATION RATING TABLE 2 - FREE-AIR TEMPERATURES PACKAGE PWP# PWP|| AIR FLOW (CFM) TA < 25C POWER RATING DERATING FACTOR ABOVE TA = 25C TA = 70C POWER RATING TA = 85C POWER RATING 0 2.9 W 23.5 mW/C 1.9 W 1.5 W 300 4.3 W 34.6 mW/C 2.8 W 2.2 W 0 3W 23.8 mW/C 1.9 W 1.5 W 300 7.2 W 57.9 mW/C 4.6 W 3.8 W # This parameter is measured with the recommended copper heat sink pattern on a 1-layer PCB, 5-in x 5-in PCB, 1 oz. copper, 2-in x 2-in coverage (4 in2). || This parameter is measured with the recommended copper heat sink pattern on a 8-layer PCB, 1.5-in x 2-in PCB, 1 oz. copper with layers 1, 2, 4, 5, 7, and 8 at 5% coverage (0.9 in2) and layers 3 and 6 at 100% coverage (6 in2). For more information, refer to TI technical brief SLMA002. recommended operating conditions MIN MAX UNIT Input voltage, VIk 2.7 10 V Output voltage range, VO 1.2 5.5 V Output current, IO (Note 1) Operating virtual junction temperature, TJ (Note 1) 0 1.0 A - 40 125 C 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. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 5 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 electrical characteristics over recommended operating free-air temperature Vi = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, CO = 10 F (unless otherwise noted) PARAMETER TEST CONDITIONS TPS76801 Output voltage (10 A to 1 A load) (see Note 2) 5.5 V VO 1.2 V, 5.5 V VO 1.2 V, TJ = 25C TJ = -40C to 125C TPS76815 TJ = 25C, TJ = -40C to 125C, 2.7 V < VIN < 10 V TPS76818 TJ = 25C, TJ = -40C to 125C, 2.8 V < VIN < 10 V TPS76825 TJ = 25C, TJ = -40C to 125C, 3.5 V < VIN < 10 V TPS76827 TJ = 25C, TJ = -40C to 125C, 3.7 V < VIN < 10 V TPS76828 TJ = 25C, TJ = -40C to 125C, 3.8 V < VIN < 10 V TPS76830 TJ = 25C, TJ = -40C to 125C, 4.0 V < VIN < 10 V TPS76833 TJ = 25C, TJ = -40C to 125C, 4.3 V < VIN < 10 V TPS76850 TJ = 25C, TJ = -40C to 125C, 6.0 V < VIN < 10 V 10 A < IO < 1 A, TJ = 25C IO = 1 A, TJ = -40C to 125C Quiescent current ((GND current)) EN = 0V, (see Note 2) Output voltage line regulation (VO/VO) (see Notes 2 and 3) 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 0.98VO Output current Limit VO = 0 V Standby current FB input current TPS76801 1.02VO 1.470 1.530 1.8 1.764 1.836 2.5 2.450 2.550 2.7 2.646 2.754 2.856 3.0 2.940 3.060 3.3 3.234 3.366 5.0 4.900 5.100 85 125 EN = VI, TJ = -40C to 125C 2.7 V < VI < 10 V %/V 3 mV 1 A 10 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 CO = 10 F, V 60 0.5 EN = 0 V -1 EN = VI -1 NOTE: 2. Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum IN voltage 10 V. 6 POST OFFICE BOX 655303 V 98 0.15 * DALLAS, TEXAS 75265 0 V dB 1.1 92 IO(PG) = 1mA A nA 0.9 f = 1 KHz, TJ = 25C IO(PG) = 300A A C 1.7 Power supply ripple rejection (see Note 2) Input current (EN) 2 150 Low level enable input voltage PG Vrms 190 FB = 1.5 V High level enable input voltage A 0.01 1.7 TJ = 25C, 2.7 V < VI < 10 V V 2.8 2.744 Thermal shutdown junction temperature EN = VI, UNIT 1.5 Load regulation BW = 300 Hz to 50 kHz, CO = 10 F, TJ = 25C MAX VO VO + 1 V < VI 10 V, TJ = 25C Output noise voltage TYP range, %VO %VO 0.4 V 1 A 1 1 A TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 electrical characteristics over recommended operating free-air temperature Vi = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, CO = 10 F (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS MIN TYP TPS76828 IO = 1 A, IO = 1 A, TJ = 25C TJ = -40C to 125C 500 TPS76830 IO = 1 A, IO = 1 A, TJ = 25C TJ = -40C to 125C 450 TPS76833 IO = 1 A, IO = 1 A, TJ = 25C TJ = -40C to 125C 350 TPS76850 IO = 1 A, IO = 1 A, TJ = 25C TJ = -40C to 125C 230 Dropout voltage g (See Note 4) NOTES: 3. If VO 1.8 V then Vimax = 10 V, Vimin = 2.7 V: Line Reg. (mV) + %V V O If VO 2.5 V then Vimax = 10 V, Vimin = VO + 1 V: Line Reg. (mV) + %V V O V * 2.7 V imax 100 V imax * V O MAX UNIT 825 675 mV 575 380 1000 )1 V 100 range, 1000 4. IN voltage equals VO(Typ) - 100 mV; TPS76801 output voltage set to 3.3 V nominal with external resistor divider. TPS76815, TPS76818, TPS76825, and TPS76827 dropout voltage limited by input voltage range limitations (i.e., TPS76830 input voltage needs to drop to 2.9 V for purpose of this test). Table of Graphs FIGURE VO Zo VDO vs Output current 2, 3, 4 vs Free-air temperature 5, 6, 7 Ground current vs Free-air temperature 8, 9 Power supply ripple rejection vs Frequency 10 Output noise vs Frequency 11 Output impedance vs Frequency 12 Dropout voltage vs Free-air temperature 13 Output voltage Line transient response 14, 16 Load transient response 15, 17 Output voltage vs Time Dropout voltage vs Input voltage Equivalent series resistance (ESR) vs Output current POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 18 19 21 - 24 7 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 TYPICAL CHARACTERISTICS TPS76815 TPS76833 OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs OUTPUT CURRENT 1.4985 3.2835 VI = 4.3 V TA = 25C 1.4980 VO - Output Voltage - V VO - Output Voltage - V 3.2830 VI = 2.7 V TA = 25C 3.2825 3.2820 3.2815 3.2810 1.4975 1.4970 1.4965 1.4960 1.4955 3.2805 1.4950 3.2800 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 IO - Output Current - A 0.9 0 1 0.1 0.2 0.3 Figure 2 0.6 0.7 0.8 TPS76825 TPS76833 OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 0.9 1 3.32 VI = 3.5 V TA = 25C 2.4955 VI = 4.3 V 3.31 VO - Output Voltage - V 2.4950 VO - Output Voltage - V 0.5 Figure 3 2.4960 2.4945 2.4940 2.4935 2.4930 3.30 3.29 IO = 1 A IO = 1 mA 3.28 3.27 3.26 2.4925 2.4920 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 3.25 -60 -40 -20 0 20 40 Figure 4 Figure 5 POST OFFICE BOX 655303 60 80 100 120 140 TA - Free-Air Temperature - C IO - Output Current - A 8 0.4 IO - Output Current - A * DALLAS, TEXAS 75265 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 TYPICAL CHARACTERISTICS TPS76815 TPS76825 OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 1.515 2.515 VI = 3.5 V VI = 2.7 V 2.510 VO - Output Voltage - V VO - Output Voltage - V 1.510 1.505 1.500 IO = 1 A IO = 1 mA 1.495 1.490 2.505 2.500 IO = 1 A 2.495 IO = 1 mA 2.490 2.485 1.485 -60 -40 -20 0 20 40 60 80 100 120 140 2.480 -60 -40 TA - Free-Air Temperature - C -20 0 20 40 60 80 100 120 TA - Free-Air Temperature - C Figure 6 Figure 7 TPS76833 TPS76815 GROUND CURRENT vs FREE-AIR TEMPERATURE GROUND CURRENT vs FREE-AIR TEMPERATURE 92 100 VI = 2.7 V 90 VI = 4.3 V 95 86 84 82 IO = 1 mA 80 IO = 1 A 78 Ground Current - A Ground Current - A 88 90 IO = 1 A IO = 1 mA 85 IO = 500 mA IO = 500 mA 76 80 74 72 -60 -40 -20 0 20 40 60 80 100 120 140 75 -60 -40 -20 TA - Free-Air Temperature - C 0 20 40 60 80 100 120 140 TA - Free-Air Temperature - C Figure 8 Figure 9 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 9 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 TYPICAL CHARACTERISTICS TPS76833 TPS76833 OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY POWER SUPPLY RIPPLE REJECTION vs FREQUENCY 10-5 VI = 4.3 V CO = 10 F IO = 1 A TA = 25C 80 70 Output Spectral Noise Density - V Hz PSRR - Power Supply Ripple Rejection - dB 90 60 50 40 30 20 10 0 - 10 10 100 1k 10k 100k VI = 4.3 V CO = 10 F TA = 25C IO = 7 mA 10-6 IO = 1 A 10-7 10-8 102 1M 103 f - Frequency - Hz Figure 11 TPS76833 TPS76833 OUTPUT IMPEDANCE vs FREQUENCY DROPOUT VOLTAGE vs FREE-AIR TEMPERATURE 103 0 VI = 4.3 V CO = 10 F TA = 25C VDO - Dropout Voltage - mV IO = 1 A IO = 1 mA 10-1 IO = 1 A 102 101 IO = 10 mA 100 10-1 IO = 0 CO = 10 F 10-2 101 102 103 104 f - Frequency - kHz 105 106 10-2 -60 -40 -20 0 20 40 Figure 13 POST OFFICE BOX 655303 60 80 100 120 140 TA - Free-Air Temperature - C Figure 12 10 105 f - Frequency - Hz Figure 10 Zo - Output Impedance - 104 * DALLAS, TEXAS 75265 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 TYPICAL CHARACTERISTICS TPS76815 TPS76815 LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE VO - Change in Output Voltage - mV VI - Input Voltage - V 100 3.7 2.7 CL = 10 F TA = 25C 50 0 -50 I O - Output Current - A VO - Change in Output Voltage - mV -100 10 0 CL = 10 F TA = 25C -10 0 20 40 60 1 0.5 0 0 80 100 120 140 160 180 200 t - Time - s 20 40 TPS76833 TPS76833 LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE 100 VO - Change in Output Voltage - mV VI - Input Voltage - V 80 100 120 140 160 180 200 t - Time - s Figure 15 Figure 14 CL = 10 F TA = 25C 5.3 I O - Output Current - A 4.3 VO - Change in Output Voltage - mV 60 10 0 -10 0 20 40 60 80 100 120 140 160 180 200 t - Time - s CL = 10 F TA = 25C 50 0 -50 -100 1 0.5 0 0 20 40 60 80 100 120 140 160 180 200 t - Time - s Figure 17 Figure 16 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 11 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 TYPICAL CHARACTERISTICS TPS76833 TPS76801 DROPOUT VOLTAGE vs INPUT VOLTAGE 4 900 3 800 IO = 1 A VDO - Dropout Voltage - mV VO- Output Voltage - V OUTPUT VOLTAGE vs TIME (AT STARTUP) 2 1 Enable Pulse - V 0 700 600 500 TA = 25C 400 TA = 125C 300 200 TA = -40C 100 0 0 20 40 60 80 100 120 140 160 180 200 t - Time - s 2.5 3.5 4 VI - Input Voltage - V 4.5 5 Figure 19 Figure 18 VI 3 To Load IN OUT + EN CO GND RL ESR Figure 20. Test Circuit for Typical Regions of Stability (Figures 21 through 24) (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. 12 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 TYPICAL CHARACTERISTICS TYPICAL REGION OF STABILITY TYPICAL REGION OF STABILITY EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT 10 ESR - Equivalent Series Resistance - ESR - Equivalent series restance - 10 Region of Instability 1 Region of Stability Vo = 3.3 V CL = 4.7 F VI = 4.3 V TA = 25C 0.1 0 200 400 600 800 Region of Instability Vo = 3.3 V Cl = 4.7 F VI = 4.3 V TJ = 125C 1 Region of Stability 0.1 1000 0 200 IO - Output Current - mA 400 Figure 21 800 1000 Figure 22 TYPICAL REGION OF STABILITY TYPICAL REGION OF STABILITY EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT 10 10 ESR - Equivalent series restance - ESR - Equivalent series restance - 600 IO - Output Current - mA Region of Instability 1 Region of Stability Vo = 3.3 V CL = 22 F VI = 4.3 V TA = 25C 0.1 0 200 400 600 800 1000 Region of Instability Vo = 3.3 V Cl = 22 F VI = 4.3 V TJ = 125C 1 Region of Stability 0.1 0 IO - Output Current - mA 200 400 600 800 1000 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. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 13 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 APPLICATION INFORMATION The TPS768xx 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 offers an adjustable device, the TPS76801 (adjustable from 1.2 V to 5.5 V). device operation The TPS768xx 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 TPS768xx 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 TPS768xx quiescent current remains low even when the regulator drops out, eliminating both problems. The TPS768xx 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 2 A. 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 120 s. minimum load requirements The TPS768xx 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 26. 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 TPS768xx 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 TPS768xx requires an output capacitor connected between OUT and GND to stabilize the internal control loop. The minimum recommended capacitance value is 10 F and the ESR (equivalent series resistance) must be between 50 m and 1.5 . Capacitor values 10 F or larger are acceptable, provided the ESR is less than 1.5 . Solid tantalum electrolytic, aluminum electrolytic, and multilayer ceramic capacitors are all suitable, provided they meet the requirements described above. Most of the commercially available 10 F surface-mount ceramic capacitors, including devices from Sprague and Kemet, meet the ESR requirements stated above. 14 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 APPLICATION INFORMATION external capacitor requirements (continued) TPS768xx 6 VI 7 IN PG 5 PG 250 k IN OUT C1 0.1 F 16 OUT EN 14 VO 13 + GND CO 10 F 3 Figure 25. Typical Application Circuit (Fixed Versions) programming the TPS76801 adjustable LDO regulator The output voltage of the TPS76801 adjustable regulator is programmed using an external resistor divider as shown in Figure 26. The output voltage is calculated using: V O ) + Vref R1 R2 1 (1) Where Vref = 1.1834 V typ (the internal reference voltage) Resistors R1 and R2 should be chosen for approximately 50-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 = 30.1 k to set the divider current at 50 A and then calculate R1 using: R1 + V V O ref *1 (2) R2 OUTPUT VOLTAGE PROGRAMMING GUIDE TPS76801 VI 0.1 F IN PG PG 250 k 1.7 V 0.9 V OUTPUT VOLTAGE EN OUT VO R1 FB / NC GND R1 R2 UNIT 2.5 V 33.2 30.1 k 3.3 V 53.6 30.1 k 3.6 V 61.9 30.1 k 4.75 V 90.8 30.1 k R2 Figure 26. TPS76801 Adjustable LDO Regulator Programming POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 15 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 APPLICATION INFORMATION power-good indicator The TPS768xx 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. PG does not assert itself when the regulated output voltage falls out of the specified 2% tolerance, but instead reports an output voltage low, relative to its nominal regulated value. regulator protection The TPS768xx 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 TPS768xx also features internal current limiting and thermal protection. During normal operation, the TPS768xx limits output current to approximately 1.7 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., 172C/W for the 8-terminal SOIC and 32.6C/W for the 20-terminal PWP with no airflow. 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 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 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 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211B - JUNE 1999 - REVISED JULY 1999 MECHANICAL DATA PWP (R-PDSO-G**) PowerPAD PLASTIC SMALL-OUTLINE PACKAGE 20-PIN SHOWN 0,30 0,19 0,65 20 0,10 M 11 Thermal Pad (See Note D) 4,50 4,30 0,15 NOM 6,60 6,20 Gage Plane 1 10 0,25 A 0- 8 0,75 0,50 Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,10 14 16 20 24 28 A MAX 5,10 5,10 6,60 7,90 9,80 A MIN 4,90 4,90 6,40 7,70 9,60 DIM 4073225/E 03/97 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusions. The package thermal performance may be enhanced by bonding the thermal pad to an external thermal plane. This pad is electrically and thermally connected to the backside of the die and possibly selected leads. E. Falls within JEDEC MO-153 PowerPAD is a trademark of Texas Instruments Incorporated. 18 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 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. 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