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GND

EN

LP5910

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Design

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LP5910

SNVSA91C – SEPTEMBER 2015 – REVISED JUNE 2016

LP5910 300-mA Ultra-Low-Noise LDO for RF and Analog Circuits - Requires No Bypass

Capacitor

1

1 Features

1

•

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 Noise Without a Noise Bypass

•

Stable with Ceramic Input and Output Capacitors

•

Thermal Overload Protection

•

Short-Circuit Protection

•

Reverse Current Protection

•

Automatic Output Discharge for Fast Turnoff

2 Applications

•

Smart Phones

•

Tablets

•

Wireless LAN Devices

•

Post BUCK and DC-DC Regulation for RF, VCO,

and PLL Device Bias

•

Set-Top Boxes

•

Cameras

3 Description

The LP5910 is an LDO capable of supplying 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.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE

LP5910

WSON (6)

2.00 mm × 2.00 mm (NOM)

DSBGA (4)

0.742 mm × 0.742 mm (MAX)

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic