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.