7 x LDO

Control

Serial

Interface

Li - Ion Charger

AC Adapter

Ichg

Monitor

-

+

BB Processor

Power Domains

Memory

RF

Peripheral

Devices

I/O

Interface

of

Baseband

Processor

LP3918

www.ti.com

SNVS476D – AUGUST 2007 – REVISED MAY 2013

LP3918 Battery Charge Management and Regulator Unit

Check for Samples: LP3918

1

FEATURES

KEY SPECIFICATIONS

2

•

Fully Integrated Li-Ion Battery Charger with

•

50mA to 950mA Programmable Charge

Thermal Regulation

Current

•

USB Charge Mode

•

3.0V to 5.5V Input Voltage Range

•

7 Low Noise LDO’s

•

200mV Typ. Dropout Voltage on 300 mA LDO’s

–

2 x 300 mA

•

2% (Typ) Output Voltage Accuracy on LDO’s

–

3 x 150 mA

DESCRIPTION

–

2 x 80 mA

The LP3918 is a fully integrated charger and multi-

•

I2C Compatible Interface for Controlling LDO

regulator unit designed for CDMA cellular phones.

Outputs and Charger Operation

The LP3918 contains a Li-Ion battery charger, 7 low

•

Thermal Shutdown

noise low dropout (LDO) voltage regulators and a

high-speed

serial

interface

to

program

on/off

•

Under Voltage Lockout

conditions

and

output

voltages

of

individual

•

25-Bump Thin DSBGA Package 2.5 x 2.5 mm

regulators, and also to read status information from

•

Options Available on Request, Please Contact

the PMU.

Sales Office for Further Information;

The Li-Ion charger integrates a power FET, reverse

–

Level Detect on HF_PWR & PWR_ON

current blocking diode, sense resistor with current

monitor output, and requires only a few external

–

LDO Charging Mode

components. Charging is thermally regulated to

–

Custom Default Settings on Charger, and

obtain the most efficient charging rate for a given

LDO O/P's.

ambient temperature.

LDO regulators provide high PSRR and low noise

APPLICATIONS

ideally suited for supplying power to both analog and

•

CDMA Phone Handsets

digital loads.

•

Low Power Wireless Handsets

•

Handheld Information Appliances

•

Personal Media Players

•

Digital Cameras

Functional Block Diagram

Figure 1. Simplified Functional Block Diagram

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

On products compliant to MIL-PRF-38535, all parameters are

Instruments standard warranty. Production processing does not

tested unless otherwise noted. On all other products, production

necessarily include testing of all parameters.

processing does not necessarily include testing of all parameters.