TPS71H01 Datasheet, PDF (1/45 Pages) Texas Instruments – LOW-DROPOUT VOLTAGE REGULATORS

TPS71H01Q, TPS71H33Q, TPS71H48Q, TPS71H50Q
LOWĆDROPOUT VOLTAGE REGULATORS
SLVS152B − NOVEMBER 1996 − REVISED AUGUST 2002
D Available in 5-V, 4.85-V, and 3.3-V
Fixed-Output and Adjustable Versions
D Very Low-Dropout Voltage . . . Maximum of _GND/HEATSINK
32 mV at I_O = 100 mA (TPS71H50)
GND/HEATSINK
D Very Low Quiescent Current − Independent
GND
of Load . . . 285 µA Typ
NC
D Extremely Low Sleep-State Current
0.5 µA Max
D 2% Tolerance Over Specified Conditions
For Fixed-Output Versions
D Output Current Range of 0 mA to 500 mA
EN
IN
IN
NC
GND/HEATSINK
GND/HEATSINK
D TSSOP Package Option Offers Reduced
Component Height for Space-Critical
Applications
D Thermally Enhanced Surface-Mount
Package
D Power-Good (PG) Status Output
PWP PACKAGE
(TOP VIEW)
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
PWP PACKAGE
(BOTTOM VIEW)
GND/HEATSINK
GND/HEATSINK
NC
NC
PG
SENSE^†/FB^‡
OUT
OUT
GND/HEATSINK
GND/HEATSINK
description
Thermal
Pad
The TPS71Hxx integrated circuits are a family of
micropower low-dropout (LDO) voltage regula-
tors. 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.
Because the PMOS device behaves as a
low-value resistor, the dropout voltage is very low
(maximum of 32 mV at an output current of
NC − No internal connection
† _{SENSE − Fixed voltage options only (TPS71H33,}
TPS71H48, and TPS71H50)
‡ _{FB − Adjustable version only (TPS71H01)}
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 T_J = 25°C.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
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