RPG

COUT

CIN

IN

OUT

EN

PG

GND

VOUT

VIN

LP3988-Q1

OFF

ON

VOUT OK

ERROR

VEN

VPG

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LP3988-Q1

SLAS928B – MARCH 2013 – REVISED NOVEMBER 2016

LP3988-Q1 Micropower, 150-mA Ultra-Low-Dropout CMOS LDO With Power Good

1

1 Features

1

•

Qualified for Automotive Applications

•

AEC-Q100 Qualified With the Following Results:

–

Device Temperature Grade 1: –40°C to

+125°C Ambient Operating Temperature

–

Device HBM ESD Classification Level H2

–

Device CDM ESD Classification Level C4B

•

Operating Input Voltage 2.5 V to 6 V

•

Power-Good Flag Output

•

Logic-Controlled Enable

•

Stable With Ceramic and High-Quality Tantalum

Capacitors

•

Fast Turnon

•

Thermal Shutdown and Short-Circuit Current Limit

•

5-Pin SOT-23 Package

2 Applications

•

Automotive

•

CDMA Cellular Handsets

•

Wideband CDMA Cellular Handsets

•

GSM Cellular Handsets

•

Portable Information Appliances

3 Description

The LP3988-Q1 is a 150-mA low-dropout regulator

designed specially to meet requirements of portable

battery applications. The LP3988-Q1 works with a

space-saving 1-µF ceramic capacitor. The LP3988-

Q1 features an error flag-output that indicates a faulty

output condition.

The LP3988-Q1 has performance optimized for

battery-powered

systems

to

deliver

low

noise,

extremely low dropout voltage, and low quiescent

current. Regulator ground current increases only

slightly in dropout, further prolonging the battery life.

Power-supply rejection is better than 60 dB at low

frequencies and starts to roll off at 10 kHz. The

device maintains high power-supply rejection down to

lower

input

voltage

levels

common

to

battery-

operated circuits.

The device is ideal for mobile phone and similar

battery-powered wireless applications. It provides up

to 150 mA, from a 2.5-V to 6-V input, consuming less

than 1 µA in disable mode, and has fast turnon time

less than 200 µs.

The LP3988-Q1 is available in a 5-pin SOT-23

package, has performance specified for the

−40°C to

+125°C temperature range, and is available in a 2.85-

V output voltage. For other voltage options, contact TI

sales.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LP3988-Q1

SOT-23 (5)

2.90 mm × 1.60 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic