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LP3988

SNVS161E – OCTOBER 2001 – REVISED OCTOBER 2015

LP3988 Micropower, 150-mA Ultra-Low-Dropout CMOS Voltage Regulator

With Power Good

1 Features

3 Description

The LP3988 is a 150-mA low dropout regulator

1

•

Input Voltage Range: 2.5 V to 6 V

designed specially to meet requirements of portable

•

Output Current: 150 mA

battery applications. The LP3988 is designed to work

•

PSRR at 10 kHz: 40 dB

with space-saving, small 1-µF ceramic capacitors.

The LP3988 features a Power Good (PG) output that

•

Quiescent Current When Shut Down:

≤ 1µA

indicates a faulty output condition. The device is ideal

•

Fast Turnon Time: 100 µs (Typical)

for

mobile

phone

and

similar

battery-powered

•

Dropout With 150-mA load: 80 mV (Typical)

wireless applications. It provides up to 150 mA output

current from a 2.5-V to 6-V input, consuming less

•

Junction Temperature Range for Operation:

than 1 µA in disable mode and has fast turnon time

−40°C to +125°C

less than 200 µs.

•

Power-Good Flag Output

The LP3988 device's performance is optimized for

•

Logic Controlled Enable

battery-powered

systems

to

deliver

low

noise,

•

Thermal Shutdown and Short-Circuit Current Limit

extremely low dropout voltage, and low quiescent

•

Stable with Ceramic and High-Quality Tantalum

current. Regulator ground current increases only

Capacitors

slightly in dropout, further prolonging the battery life.

Power supply rejection is better than 60 dB at low

2 Applications

frequencies and starts to roll off at 10 kHz. High

•

CDMA Cellular Handsets

power-supply rejection is maintained down to lower

input-voltage levels common to battery-operated

•

Wideband CDMA Cellular Handsets

circuits.

•

GSM Cellular Handsets

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

•

Portable Information Appliances

and a 5-pin thin DSBGA package. Performance is

•

Tiny 3.3 V ± 5% to 2.85 V, 150-mA Converter

specified for

−40°C to +125°C temperature range. For

all available output voltage and package options, see

the Package Option Addendum (POA) at the end of

the data sheet.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

SOT-23 (5)

2.90 mm × 1.60 mm

LP3988

DSBGA (5)

1.502 mm × 1.045 mm(2)

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

the end of the data sheet.

(2) Body size dimension is maximum.

Simplified Schematic

1

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.