1 Features

? Input voltage range: 1.6 V to 6.5 V

? Output voltage range: 0.8 V to 5.5 V

? Output current: Up to 500 mA

? Low output-voltage noise: 12 μVRMS (typ)

? PSRR at 1 kHz: 75 dB (typ)

? Output voltage tolerance (VOUT ≥ 3.3 V): ±2

? Low IQ (enabled, no load): 30 μA (typ)

? Low dropout (VOUT ≥ 3.3 V):

95 mV (typ) at 500-mA load

? Stable with 1-μF ceramic input and output

capacitors

? Thermal-overload and short-circuit protection

? Reverse current protection

? No noise bypass capacitor required

? Output automatic discharge for fast turnoff

? Power-good output with 140-μs (typ) delay

? Internal soft-start to limit inrush current

? Operating junction temperature: –55°C to +125°C

? Supports defense, aerospace, and medical

applications:

– Controlled baseline

– One assembly and test site

– One fabrication site

– Extended product life cycle

– Extended product-change notification

– Product traceability

2 Applications

? Surveillance systems

? Inertial navigation

? Land mobile radios

? Global positioning system receivers

? Data concentrator units

3 Description

The LP5912-EP is a low-noise, low-dropout regulator

(LDO) that can supply up to 500 mA of output

current. Designed to meet the requirements of RF and

analog circuits, the LP5912-EP provides low noise,

high PSRR, low quiescent current, and low line and

load transient response. The LP5912-EP offers classleading

noise performance without a noise bypass

capacitor and with the ability for remote output

capacitance placement.

The device is designed to work with a 1-μF input and

a 1-μF output ceramic capacitor (a separate noise

bypass capacitor is not required).

This device is available with fixed output voltages

from 0.8 V to 5.5 V in 25-mV steps. Contact the Texas

Instruments Sales office for specific voltage option

requirements.