文档介绍：TPS7201Q, TPS7225Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102G – MARCH 1995 – REVISED JUNE 2000
D Available in 5-V, -V, -V, -V, and D, P, OR PW PACKAGE
-V Fixed-Output and Adjustable Versions (TOP VIEW)
D
Dropout Voltage <85 mV Max at SENSE†/FB‡ 1 8 OUT
I = 100 mA (TPS7250)
O RESET/PG 2 7 OUT
D Low Quiescent Current, Independent of GND 3 6 IN
µ
Load, 180 A Typ EN 4 5 IN
D 8-Pin SOIC and 8-Pin TSSOP Package
†
D Output Regulated to ±2% Over Full SENSE – Fixed voltage options only
(TPS7225, TPS7230, TPS7233, TPS7248,
Operating Range for Fixed-Output Versions and TPS7250)
D Extremely Low Sleep-State Current, ‡ FB – Adjustable version only (TPS7201)
µA Max
D Power-Good (PG) Status Output 600

TA = 25°C
description
500
The TPS72xx family of low-dropout (LDO) voltage
regulators offers the benefits of low-dropout TPS7225
400
voltage, micropower operation, and miniaturized TPS7230
packaging. These regulators feature extremely
low dropout voltages and quiescent currents 300
compared to conventional LDO regulators. TPS7233
Offered in small-outline integrated-circuit (SOIC)
200 TPS7248
packages and 8-terminal thin shrink small-outline – mV – Dropout Voltage
(TSSOP), the TPS72xx series devices are ideal
DO
for cost-sensitive designs and for designs where V
100
board space is at a premium.
TPS7250
bination of new circuit design and process
0
innovation has enabled the usual pnp pass 0 50 100 150 200 250
transistor to be replaced by a PMOS device.
IO – Output Current – mA
Because the PMOS pass element behaves as a
low-value resistor, the dropout voltage is very low Figure 1. Typical Dropout Voltage Versus
– maximum of 85 mV at 100 mA of load current Output Current
(TPS7250) – and is directly proportional to the
load current (see Figure 1). Since the PMOS pass
element is a voltage-driven device, the quies