1 Features
• Input voltage range: 1.3 V to 3.3 V
• Output voltage range: 0.8 V to 2.3 V
• Output current: 300 mA
• PSRR: 75 dB at 1 kHz
• Output voltage tolerance: ±2%
• Low dropout: 120 mV (typical)
• Very low IQ (enabled, no load): 12 μA
• Low output-voltage noise: 12 μVRMS
• Stable with ceramic input and output capacitors
• Thermal overload protection
• Short-circuit protection
• Reverse current protection
• Automatic output discharge for fast turnoff

2 Applications
• Mobile phones and tablets
• Digital cameras and audio devices
• Portable and battery-powered equipment
• Portable medical equipment
• Virtual reality
• RF, PLL, VCO, and clock power supplies
• IP cameras

3 Description
The LP5910 is a low-noise LDO that can supply
up to 300 mA of output current. Designed to meet
the requirements of RF and analog circuits, this
device provides low noise, high PSRR, low quiescent
current, and superior line transient and load transient
response. Using new innovative design techniques
the LP5910 offers class-leading noise performance
without a noise bypass capacitor and with the option
for remote output capacitor placement.
The device contains a reverse current protection
circuit that prevents a reverse current flow through the
LDO to the IN pin when the input voltage is lower than
the output voltage.
When the Enable (EN) pin is low, and the output is
in an OFF state, an automatic output discharge circuit
discharges the output capacitance for fast turnoff.
With its low input and low output voltage range the
LP5910 is well-suited as a post DC-DC regulator
(post BUCK regulator) or for single- or dual-cell
applications.
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 2.3 V in 25-mV steps. Contact Texas
Instruments Sales for specific voltage option needs.