TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211H – JUNE 1999 – REVISED JULY 2003 D 1 A Low-Dropout Voltage Regulator D Available in 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V, D D D D D D D PWP PACKAGE (TOP VIEW) 3.0-V, 3.3-V, 5.0-V Fixed Output and Adjustable Versions Dropout Voltage Down to 230 mV at 1 A (TPS76850) Ultralow 85 µA 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 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-µF 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 µF 10–2 –60 –40 –20 0 20 40 60 80 100 120 140 TA – Free-Air Temperature – °C Co = 10 µF TA = 25°C 50 0 –50 –100 1 0.5 0 0 100 200 300 400 500 600 700 800 900 1000 t – Time – µs 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 1999–2003, 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 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 µA 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 µA at TJ = 25°C. 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 – 40°C to 125°C PACKAGED DEVICES TYP TSSOP (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 µF 5 OUT EN 14 VO 13 + GND Co† 10 µF 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 Terminal Functions SOIC Package TERMINAL NAME NO. I/O DESCRIPTION GND 1 EN 2 I Regulator ground 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 PWP Package TERMINAL NAME NO. I/O DESCRIPTION GND/HSINK 1 Ground/heatsink GND/HSINK 2 Ground/heatsink GND 3 LDO ground NC 4 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 No connect 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)Ĕ 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 125°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C 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 AIR FLOW (CFM) TA < 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C 0 568.18 mW 250 904.15 mW D TA = 70°C POWER RATING TA = 85°C POWER RATING 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 AIR FLOW (CFM) TA < 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C 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 PWP§ PWP¶ TA = 85°C POWER RATING 3.8 W § This parameter is measured with the recommended copper heat sink pattern on a 1-layer PCB, 5-in × 5-in PCB, 1 oz. copper, 2-in × 2-in coverage (4 in2). ¶ This parameter is measured with the recommended copper heat sink pattern on a 8-layer PCB, 1.5-in × 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 0 1.0 A Output current, IO (see Note 1) Operating virtual junction temperature, TJ (see Note 1) – 40 125 °C # 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 electrical characteristics over recommended operating free-air temperature range, VI = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, Co = 10 µF (unless otherwise noted) PARAMETER TEST CONDITIONS TPS76801 Out ut voltage (10 µA to 1 A load) Output (see Note 2) 5.5 V ≥ VO ≥ 1.5 V, 5.5 V ≥ VO ≥ 1.5 V, MIN TJ = 25°C TJ = –40°C to 125°C TPS76815 TJ = 25°C, TJ = –40°C to 125°C, TPS76818 TJ = 25°C, TJ = –40°C to 125°C, TPS76825 TJ = 25°C, TJ = –40°C to 125°C, 3.5 V < VIN < 10 V TPS76827 TJ = 25°C, TJ = –40°C to 125°C, 3.7 V < VIN < 10 V TPS76828 TJ = 25°C, TJ = –40°C to 125°C, 3.8 V < VIN < 10 V TPS76830 TJ = 25°C, TJ = –40°C to 125°C, TPS76833 TJ = 25°C, TJ = –40°C to 125°C, 4.3 V < VIN < 10 V TPS76850 TJ = 25°C, TJ = –40°C to 125°C, 6 V < VIN < 10 V Quiescent current (GND current) EN = 0V, (see Note 2) Output voltage line regulation (∆VO/VO) (see Notes 2 and 3) 1.470 2.8 V < VIN < 10 V 1.764 TJ = –40°C to 125°C 2.550 2.7 2.646 2.754 V 2.8 2.940 IO = 1 A, 1.836 2.5 4 V < VIN < 10 V 6 V < VIN < 10 V TJ = 25°C 1.530 2.450 2.744 10 µA < IO < 1 A, 1.02VO 1.8 3.8 V < VIN < 10 V 4 V < VIN < 10 V 4.3 V < VIN < 10 V UNIT 1.5 2.7 V < VIN < 10 V 2.8 V < VIN < 10 V 3.7 V < VIN < 10 V MAX VO 0.98VO 2.7 V < VIN < 10 V 3.5 V < VIN < 10 V TYP 2.856 3.0 3.060 3.3 3.234 3.366 5.0 4.900 5.100 85 125 VO + 1 V < VI ≤ 10 V, TJ = 25°C Load regulation µA A 0.01 %/V 3 mV Output noise voltage (TPS76818) BW = 200 Hz to 100 kHz, Co = 10 µF, IC = 1 A, TJ = 25°C 55 µVrms Output current limit VO = 0 V 1.7 Thermal shutdown junction temperature Standby current FB input current TPS76801 EN = VI, 2.7 V < VI < 10 V TJ = 25°C, EN = VI, 2.7 V < VI < 10 V TJ = –40°C to 125°C °C 1 µA 2 V 0.9 f = 1 KHz, Co = 10 µF, Power supply ripple rejection (see Note 2) 60 TJ = 25°C NOTES: 2. Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum IN voltage 10 V. 3. If VO ≤ 1.8 V then VImax = 10 V, VImin = 2.7 V: V O ǒVImax * 2.7 VǓ 100 If VO ≥ 2.5 V then VImax = 10 V, VImin = VO + 1 V: Line Reg. (mV) + ǒ%ńVǓ V O 1000 ǒVImax * ǒVO ) 1 VǓǓ POST OFFICE BOX 655303 100 • DALLAS, TEXAS 75265 1000 µA nA 1.7 Low level enable input voltage Line Reg. (mV) + ǒ%ńVǓ A 150 10 FB = 1.5 V High level enable input voltage 6 2 V dB TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211H – JUNE 1999 – REVISED JULY 2003 electrical characteristics over recommended operating free-air temperature range, VI = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, Co = 10 µF (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS Trip threshold voltage IO(PG) = 300 µA VO decreasing Hysteresis voltage Measured at VO Output low voltage VI = 2.7 V, V(PG) = 5 V Minimum input voltage for valid PG PG Leakage current Input current (EN) MIN TYP UNIT 98 %VO %VO 1.1 92 V 0.5 IO(PG) = 1 mA 0.15 EN = 0 V –1 EN = VI –1 0 0.4 V 1 µA 1 µA A 1 IO = 1 A, IO = 1 A, TJ = 25°C TJ = –40°C to 125°C 500 TPS76828 TJ = 25°C TJ = –40°C to 125°C 450 TPS76830 IO = 1 A, IO = 1 A, TJ = 25°C TJ = –40°C to 125°C 350 TPS76833 IO = 1 A, IO = 1 A, TJ = 25°C TJ = –40°C to 125°C 230 TPS76850 IO = 1 A, IO = 1 A, Dro out voltage Dropout (see Note 4) MAX 825 675 mV 575 380 NOTE 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). TYPICAL CHARACTERISTICS Table of Graphs FIGURE VO Zo VDO Output voltage 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 spectral noise density vs Frequency 11 Input voltage (min) vs Output voltage 12 Output impedance vs Frequency 13 Dropout voltage vs Free-air temperature Line transient response Load transient response VO 14 15, 17 16, 18 Output voltage vs Time Dropout voltage vs Input voltage Equivalent series resistance (ESR) vs Output current POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 19 20 22 – 25 7 TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211H – JUNE 1999 – REVISED JULY 2003 TYPICAL CHARACTERISTICS TPS76815 TPS76833 OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs OUTPUT CURRENT 1.4985 3.2835 VI = 4.3 V TA = 25°C 1.4980 VO – Output Voltage – V VO – Output Voltage – V 3.2830 VI = 2.7 V TA = 25°C 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 = 25°C 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 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 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 2.480 –60 –40 100 120 140 TA – Free-Air Temperature – °C –20 0 20 40 60 80 100 120 TA – Free-Air Temperature – °C Figure 6 Figure 7 TPS76833 GROUND CURRENT vs FREE-AIR TEMPERATURE 92 90 VI = 4.3 V 88 Ground Current – µ A VO – Output Voltage – V 1.510 86 84 82 IO = 1 mA 80 IO = 1 A 78 IO = 500 mA 76 74 72 –60 –40 –20 0 20 40 60 80 100 120 140 TA – Free-Air Temperature – °C Figure 8 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 TYPICAL CHARACTERISTICS TPS76815 TPS76833 GROUND CURRENT vs FREE-AIR TEMPERATURE POWER SUPPLY RIPPLE REJECTION vs FREQUENCY 90 PSRR – Power Supply Ripple Rejection – dB 100 VI = 2.7 V Ground Current – µ A 95 90 IO = 1 A IO = 1 mA 85 IO = 500 mA 80 75 –60 –40 –20 0 20 40 60 80 70 60 50 40 30 20 10 0 – 10 10 100 120 140 VI = 4.3 V Co = 10 µF IO = 1 A TA = 25°C 80 100 TA – Free-Air Temperature – °C Figure 9 Figure 10 TPS76833 OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY Output Spectral Noise Density – µV Hz 10–5 VI = 4.3 V Co = 10 µF TA = 25°C IO = 7 mA 10–6 IO = 1 A 10–7 10–8 102 103 104 f – Frequency – Hz Figure 11 10 1k 10k f – Frequency – Hz POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 105 100k 1M TPS76815Q, TPS76818Q, TPS76825Q, TPS76827Q TPS76828Q, TPS76830Q TPS76833Q, TPS76850Q, TPS76801Q FAST-TRANSIENT-RESPONSE 1-A LOW-DROPOUT VOLTAGE REGULATORS SLVS211H – JUNE 1999 – REVISED JULY 2003 TYPICAL CHARACTERISTICS INPUT VOLTAGE (MIN) vs OUTPUT VOLTAGE 4 IO = 1 A VI – Input Voltage (Min) – V TA = 25°C TA = 125°C 3 TA = –40°C 2.7 2 1.5 1.75 3 2 2.25 2.5 2.75 VO – Output Voltage – V 3.25 3.5 Figure 12 TPS76833 TPS76833 OUTPUT IMPEDANCE vs FREQUENCY DROPOUT VOLTAGE vs FREE-AIR TEMPERATURE 103 0 IO = 1 A VDO – Dropout Voltage – mV Zo – Output Impedance – Ω VI = 4.3 V Co = 10 µF TA = 25°C IO = 1 mA 10–1 IO = 1 A 102 101 IO = 10 mA 100 10–1 IO = 0 Co = 10 µF 10–2 101 102 103 104 f – Frequency – kHz 105 106 10–2 –60 –40 –20 0 20 40 60 80 100 120 140 TA – Free-Air Temperature – °C Figure 13 Figure 14 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 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 Co = 10 µF TA = 25°C 50 0 –50 I O – Output Current – A ∆ VO – Change in Output Voltage – mV –100 10 0 Co = 10 µF TA = 25°C –10 0 20 40 60 1 0.5 0 0 80 100 120 140 160 180 200 t – Time – µs 100 200 300 400 500 600 700 800 900 1000 t – Time – µs Figure 16 TPS76833 TPS76833 LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE 100 ∆ VO – Change in Output Voltage – mV VI – Input Voltage – V Figure 15 Co = 10 µF TA = 25°C 5.3 I O – Output Current – A ∆ VO – Change in Output Voltage – mV 4.3 10 0 –10 0 20 40 60 80 100 120 140 160 180 200 t – Time – µs Co = 10 µF TA = 25°C 50 0 –50 –100 1 0.5 0 0 100 200 300 400 500 600 700 800 900 1000 t – Time – µs Figure 18 Figure 17 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 TYPICAL CHARACTERISTICS TPS76833 TPS76801 OUTPUT VOLTAGE vs TIME (AT STARTUP) DROPOUT VOLTAGE vs INPUT VOLTAGE 900 IO = 1 A Co = 10 µF IO = 1 A TA = 25°C 3 800 VDO – Dropout Voltage – mV VO– Output Voltage – V 4 2 1 Enable Pulse – V 0 700 600 500 TA = 25°C 400 TA = 125°C 300 200 TA = –40°C 100 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 t – Time – ms 0.9 1 2.5 3.5 4 VI – Input Voltage – V 4.5 5 Figure 20 Figure 19 VI 3 To Load IN OUT + EN Co GND RL ESR Figure 21. Test Circuit for Typical Regions of Stability (Figures 22 through 25) (Fixed Output Options) 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 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 – Ω ESR – Equivalent Series Resistance – Ω 10 Region of Instability 1 VO = 3.3 V Co = 4.7 µF VI = 4.3 V TA = 25°C Region of Stability 0.1 Region of Instability 1 VO = 3.3 V Co = 4.7 µF VI = 4.3 V TJ = 125°C 0.1 Region of Instability Region of Instability 0.01 0.01 0 200 400 600 800 0 1000 200 400 600 800 1000 IO – Output Current – mA IO – Output Current – mA Figure 22 Figure 23 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 Resistance – Ω ESR – Equivalent Series Resistance – Ω Region of Stability Region of Instability 1 VO = 3.3 V Co = 22 µF VI = 4.3 V TA = 25°C Region of Stability 0.1 Region of Instability 0.01 Region of Instability 1 VO = 3.3 V Co = 22 µF VI = 4.3 V TJ = 125°C Region of Stability 0.1 Region of Instability 0.01 0 200 400 600 800 1000 0 IO – Output Current – mA 200 400 600 800 1000 IO – Output Current – mA Figure 24 Figure 25 † 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. 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 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/β). 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 β 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 µA. If the shutdown feature is not used, EN should be tied to ground. 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 shown in Figure 27. 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 µF 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 µF and the ESR (equivalent series resistance) must be between 60 mΩ and 1.5 Ω. Capacitor values 10 µF or larger are acceptable, provided the ESR is less than 1.5 Ω. 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 µF surface-mount ceramic capacitors, including devices from Sprague and Kemet, meet the ESR requirements stated above. 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 APPLICATION INFORMATION external capacitor requirements (continued) TPS768xx 6 VI 7 IN PG 5 PG 250 kΩ IN OUT C1 0.1 µF 16 EN OUT 14 VO 13 + GND Co 10 µF 3 Figure 26. 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 27. The output voltage is calculated using: V O +V ǒ1 ) R1 Ǔ R2 ref (1) where: Vref = 1.1834 V typ (the internal reference voltage) Resistors R1 and R2 should be chosen for approximately 50-µA 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 kΩ to set the divider current at 50 µA and then calculate R1 using: R1 + ǒ V V Ǔ O *1 ref (2) R2 OUTPUT VOLTAGE PROGRAMMING GUIDE TPS76801 VI 0.1 µF IN PG PG 250 kΩ ≥ 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 kΩ 3.3 V 53.6 30.1 kΩ 3.6 V 61.9 30.1 kΩ 4.75 V 90.8 30.1 kΩ R2 Figure 27. TPS76801 Adjustable LDO Regulator Programming 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 SLVS211H – JUNE 1999 – REVISED JULY 2003 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 150°C(typ), thermal-protection circuitry shuts it down. Once the device has cooled below 130°C(typ), regulator operation resumes. power dissipation and junction temperature Specified regulator operation is assured to a junction temperature of 125°C; the maximum junction temperature should be restricted to 125°C 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 A + J D(max) R qJA where: TJmax is the maximum allowable junction temperature. RθJA is the thermal resistance junction-to-ambient for the package, i.e., 172°C/W for the 8-terminal SOIC and 32.6°C/W for the 20-terminal PWP with no airflow. TA is the ambient temperature. The regulator dissipation is calculated using: P D ǒ Ǔ + V *V I O I O Power dissipation resulting from quiescent current is negligible. Excessive power dissipation will trigger the thermal protection circuit. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 17 MECHANICAL DATA MSOI002B – JANUARY 1995 – REVISED SEPTEMBER 2001 D (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 8 PINS SHOWN 0.020 (0,51) 0.014 (0,35) 0.050 (1,27) 8 0.010 (0,25) 5 0.008 (0,20) NOM 0.244 (6,20) 0.228 (5,80) 0.157 (4,00) 0.150 (3,81) Gage Plane 1 4 0.010 (0,25) 0°– 8° A 0.044 (1,12) 0.016 (0,40) Seating Plane 0.010 (0,25) 0.004 (0,10) 0.069 (1,75) MAX PINS ** 0.004 (0,10) 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 4040047/E 09/01 NOTES: A. B. C. D. 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). Falls within JEDEC MS-012 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. 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