文档介绍：TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
D Open Drain Power-On Reset With 220-ms TPS773xx
Delay (TPS773xx) DGK Package
(TOP VIEW)
D Open Drain Power-Good (PG) Status
Output (TPS774xx) FB/SENSE 1 8 OUT
D 250-mA Low-Dropout Voltage Regulator RESET 2 7 OUT
EN
D Available in -V, -V (TPS77316 Only), 3 6 IN
-V, -V, -V, -V, -V Fixed Output GND 4 5 IN
and Adjustable Versions
D Dropout Voltage Typically 200 mV TPS774xx
DGK Package
at 250 mA (TPS77333, TPS77433) (TOP VIEW)
D Ultralow 92-µA Quiescent Current (Typ)
FB/SENSE 1 8 OUT
D 8-Pin MSOP (DGK) Package
PG 2 7 OUT
D Low Noise (55 µV ) Without an External
rms EN 3 6 IN
Filter (Bypass) Capacitor (TPS77318,
GND 4 5 IN
TPS77418)
D 2% Tolerance Over Specified Conditions
For Fixed-Output Versions TPS77x33
D Fast Transient Response DROPOUT VOLTAGE
D vs
Thermal Shutdown Protection JUNCTION TEMPERATURE
D See the TPS779xx Family of Devices for 300
Active High Enable

250 IO = 250 mA
description
200
The TPS773xx and TPS774xx are low-dropout
regulators with integrated power-on reset and
power good (PG) function respectively. These 150
devices are capable of supplying 250 mA of output
current with a dropout of 200 mV (TPS77333, 100
TPS77433). Quiescent current is 92 µA at full load
IO = 10 mA
µ – mV – Dropout Voltage
dropping down to 1 A when device is disabled. 50
I = 0 A
These devices are optimized to be stable with a DO O
V
wide range of output capacitors including low ESR
0
ceramic (10 µF) or low capacitance (1 µF)
tantalum capacitors. These devices have ex-
tremely low noise output performance (55 µV ) –50
rms –40 0 40 80 120 160
without using any added filter capacitors.
T – Junction Temperature –°C
TPS773xx and TPS774xx are designed to h