TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q

TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY

MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS

SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998

1

POST OFFICE BOX 655303

and 2.5-V Fixed-Output and Adjustable

Versions

Load, 180

µA Typ

Operating Range for Fixed-Output Versions

0.5

µA Max

description

The TPS72xx family of low-dropout (LDO) voltage

regulators offers the benefits of low-dropout

voltage, micropower operation, and miniaturized

packaging. These regulators feature extremely

low dropout voltages and quiescent currents

compared

to

conventional

LDO

regulators.

Offered in small-outline integrated-circuit (SOIC)

packages and 8-terminal thin shrink small-outline

(TSSOP), the TPS72xx series devices are ideal

for cost-sensitive designs and for designs where

board space is at a premium.

A combination of new circuit design and process

innovation has enabled the usual pnp pass

transistor to be replaced by a PMOS device.

Because the PMOS pass element behaves as a

low-value resistor, the dropout voltage is very low

– maximum of 85 mV at 100 mA of load current

(TPS7250) – and is directly proportional to the

load current (see Figure 1). Since the PMOS pass

element is a voltage-driven device, the quiescent current is very low (300

µA maximum) and is stable over the

entire range of output load current (0 mA to 250 mA). Intended for use in portable systems such as laptops and

cellular phones, the low-dropout voltage and micropower operation result in a significant increase in system

battery operating life.

The TPS72xx also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current

to 0.5

and may be used to implement a power-on reset or a low-battery indicator.

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).

§ This device is in the product preview stage of development. Please contact the local TI sales office for availability.

Copyright

© 1998, Texas Instruments Incorporated

This document contains information on products in more than one phase

of development. The status of each device is indicated on the page(s)

specifying its electrical characteristics.

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.

1

2

3

4

8

7

6

5

RESET/PG

GND

EN

OUT

OUT

IN

IN

D, P, OR PW PACKAGE

(TOP VIEW)

† SENSE – Fixed voltage options only

TPS7248, and TPS7250)

‡ FB – Adjustable version only (TPS7201)

Figure 1. Typical Dropout Voltage Versus

Output Current

200

0

0

50

100

150

400

200

250

100

300

IO – Output Current – mA

TPS7233

TPS7248

TPS7250

TA = 25°C

TPS7230

TPS7225

500

600