文档介绍：TPS76515, TPS76518, TPS76525, TPS76527
TPS76528, TPS76530, TPS76533, TPS76550, TPS76501
ULTRA-LOW QUIESCIENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS236 – AUGUST 1999
D 150-mA Low-Dropout Voltage Regulator D PACKAGE
(TOP VIEW)
D Available in -V, -V, -V, -V, -V,
-V, -V, -V Fixed Output and NC/FB 1 8 OUT
Adjustable Versions PG 2 7 OUT
D Dropout Voltage to 85 mV (Typ) at 150 mA GND 3 6 IN
(TPS76550) EN 4 5 IN
D Ultra-Low 35-µA Typical Quiescent Current
D 3% Tolerance Over Specified Conditions for
Fixed-Output Versions
D Open Drain Power Good
D 8-Pin SOIC Package
D Thermal Shutdown Protection

description
This device is designed to have an ultra-low quiescent current and be stable with a -µF 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 µA 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 µA (typ).
TPS76533 TPS76533
DROPOUT VOLTAGE GROUND CURRENT
vs vs
FREE-AIR TEMPERATURE LOAD CURRENT
10100
V = V
VI = V O
TA = 25°C

IO = 150 mA µ

10–1
IO = 50 mA

IO = 10 mA
– Output Voltage – V – Output Voltage 10–2

DO
V
GND
– Ground Current A

10–31
–50 –25 0 25 50 75 100 125 150 0 25 50 75 100 125 150
TA – Free-Air Temperature –°C IL –