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Details, datasheet, quote on part number:TPS71H50Q
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Datasheet text preview:
TPS71H01Q, TPS71H33Q, TPS71H48Q, TPS71H50Q LOW-DROPOUT VOLTAGE REGULATORS
SLVS152A NOVEMBER 1996 REVISED JANUARY 1997
D D D D D D D D D
Available in 5-V, 4.85-V, and 3.3-V Fixed-Output and Adjustable Versions Very Low-Dropout Voltage . . . Maximum of 32 mV at IO = 100 mA (TPS71H50) Very Low Quiescent Current Independent of Load . . . 285 µA Typ Extremely Low Sleep-State Current 0.5 µA Max 2% Tolerance Over Specified Conditions For Fixed-Output Versions Output Current Range of 0 mA to 500 mA TSSOP Package Option Offers Reduced Component Height for Space-Critical Applications Thermally Enhanced Surface-Mount Package Power-Good (PG) Status Output
PWP PACKAGE (TOP VIEW)
GND/HEATSINK GND/HEATSINK GND NC EN IN IN NC GND/HEATSINK GND/HEATSINK
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
GND/HEATSINK GND/HEATSINK NC NC PG SENSE/FB OUT OUT GND/HEATSINK GND/HEATSINK
PWP PACKAGE (BOTTOM VIEW)
description
The TPS71Hxx integrated circuits are a family of micropower low-dropout (LDO) voltage regulators. An order of magnitude reduction in dropout voltage and quiescent current over conventional LDO performance is achieved by replacing the typical pnp pass transistor with a PMOS device.
Thermal Pad
NC No internal connection
Because the PMOS device behaves as a SENSE Fixed voltage options only (TPS71H33, 1H48, and TPS71H50) low-value resistor, the dropout voltage is very low TPS7Adjustable version only (TPS71H01) FB (maximum of 32 mV at an output current of 100 mA for the TPS71H50) and is directly proportional to the output current (see Figure 1). Additionally, since the PMOS pass element is a voltage-driven device, the quiescent current is very low and remains independent of output loading (typically 285 µA over the full range of output current, 0 mA to 500 mA). These two key specifications yield a significant improvement in operating life for battery-powered systems. The LDO family also features a sleep mode; applying a TTL high signal to EN (enable) shuts down the regulator, reducing the quiescent current to 0.5 µA maximum at TJ = 25°C.
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 © 1997, 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
TPS71H01Q, TPS71H33Q, TPS71H48Q, TPS71H50Q LOW-DROPOUT VOLTAGE REGULATORS
SLVS152A NOVEMBER 1996 REVISED JANUARY 1997
description (continued)
0.25 TA = 25°C 0.2 Dropout Voltage V
0.15
TPS71H33 TPS71H48
0.1 TPS71H50 0.05
0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 IO Output Current A
Figure 1. Dropout Voltage Versus Output Current Power good (PG) reports low output voltage and can be used to implement a power-on reset or a low-battery indicator. The TPS71Hxx is offered in 3.3-V, 4.85-V, and 5-V fixed-voltage versions and in an adjustable version (programmable over the range of 1.2 V to 9.75 V). Output voltage tolerance is specified as a maximum of 2% over line, load, and temperature ranges (3% for adjustable version). The TPS71Hxx family is available in a TSSOP (20-pin) thermally enhanced surface-mount power package. The package has an innovative thermal pad that, when soldered to the printed-wiring board (PWB), enables the device to dissipate several watts of power (see Thermal Information section). Maximum height of the package is 1.2 mm.
AVAILABLE OPTIONS TJ OUTPUT VOLTAGE (V) MIN 4.9 4.75 55°C to 150°C 3.23 TYP 5 4.85 3.3 MAX 5.1 4.95 3.37 TSSOP (PWP) TPS71H50QPWPLE TPS71H48QPWPLE TPS71H33QPWPLE TPS71H01QPWPLE
Adjustable 1.2 V to 9.75 V
The PWP package is only available left-end taped and reeled, as indicated by the LE suffix on the device type. The TPS71H01Q is programmable using an external resistor divider (see application information).
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
TPS71H01Q, TPS71H33Q, TPS71H48Q, TPS71H50Q LOW-DROPOUT VOLTAGE REGULATORS
SLVS152A NOVEMBER 1996 REVISED JANUARY 1997
TPS71Hxx VI 8 9 IN 10 IN 0.1 µF 6 EN GND 1 2 3 OUT OUT SENSE 14 13 + CO 10 µF VO IN PG 20 15 PG
CSR
TPS71H33, TPS71H48, TPS71H50 (fixed-voltage options) Capacitor selection is nontrivial. See application information section for details.
Figure 2. Typical Application Configuration
functional block diagram
IN EN PG _ + OUT COMPONENT COUNT 1.12 V Vref = 1.178 V + _ SENSE /FB R1 MOS transistors Bilpolar transistors Diodes Capacitors Resistors 464 41 4 17 76 RESISTOR DIVIDER OPTIONS DEVICE TPS71H01 TPS71H33 TPS71H48 TPS71H50 R1 0 420 726 756 R2 233 233 233 UNIT k k k
NOTE A: Resistors are nominal values only.
R2
GND Switch positions are shown with EN low (active). For most applications, SENSE should be externally connected to OUT as close as possible to the device. (For other implementations, refer to SENSE-pin connection discussion in Applications Information section.)
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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