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 batteryoperated

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.