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.