VBATT: 2.7 V to 5.5 V

IN

OUT

GND

EN

For example,

1.5 V

1 PF

BATT

LP5952

Pre-

regulator

Li-Ion

or

3-cell

NiMh/NiCd

2.2 PF

For example, 1.2 V

A1

B2

C3

A3

C1

Load

0 to 350 mA

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Buy

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LP5952

SNVS469F – OCTOBER 2006 – REVISED DECEMBER 2015

LP5952 350-mA Dual-Rail Linear Regulator

1 Features

3 Description

The LP5952 is a dual-supply-rail linear regulator

1

•

Input Voltage Range: 0.7 V to 4.5 V

optimized for powering ultralow-voltage circuits from a

•

2.5 V

≤ VBATT ≤ 5.5 V

single Li-Ion cell or 3-cell NiMH/NiCd battery.

•

0.5V

≤ VOUT ≤ 2 V

In the typical post-regulation application VBATT is

•

Ensured 350-mA Output Current

directly connected to the battery (range 2.5 V to

•

For ILOAD = 350 mA:

5.5 V), and VIN is supplied by the output voltage of

the DC-DC converter (range 0.7 V to 4.5 V).

–

VBATT ≥ VOUT(NOM) + 1.5 V or 2.5 V

(Whichever is Higher)

The device offers superior dropout and transient

•

For ILOAD = 150 mA:

features combined with very low quiescent currents.

In shutdown mode (Enable (EN) pin pulled low) the

–

VBATT ≥ VOUT(NOM) + 1.3 V or 2.5 V

device turns off and reduces battery consumption to

(Whichever is Higher)

0.1 µA (typical). The LP5952 also features internal

•

Excellent Load Transient Response: ±15 mV

protection against overtemperature, overcurrent, and

Typical

undervoltage conditions.

•

Excellent Line Transient Response: ±1 mV Typical

Depending upon application, only one or two tiny

•

50-µA Typical Quiescent Current from VBATT

surface-mount external components are required;

performance is specified for a –40°C to +125°C

•

10-µA Typical Quiescent Current from VIN

junction temperature range. The device is available in

•

0.1-µA Typical Quiescent Current in Shutdown

fixed output voltages from 0.5 V to 2 V. For

•

Noise voltage = 100 µVRMS Typical

availability,

please

contact

your

local

Texas

•

Operates from a Single Li-Ion Cell or 3-Cell

Instruments sales office.

NiMH/NiCd Battery

Device Information(1)

•

Thermal-Overload and Short-Circuit Protection

PART NUMBER

PACKAGE

BODY SIZE (NOM)

DSBGA (5)

1.326 mm × 0.96 mm

2 Applications

LP5952

USON (6)

2.00 mm × 2.00 mm

•

Mobile Phones

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

•

Hand-Held Radios

the end of the data sheet.

•

Personal Digital Assistants

•

Palm-Top PCs

•

Portable Instruments

•

Battery-Powered Devices

Typical Application Circuit

1

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.