LP3918TLSLASHNOPB中文资料德州仪器数据手册PDF规格书

FEATURES

• Fully Integrated Li-Ion Battery Charger with

Thermal Regulation

• USB Charge Mode

• 7 Low Noise LDO’s

– 2 x 300 mA

– 3 x 150 mA

– 2 x 80 mA

• I2C Compatible Interface for Controlling LDO

Outputs and Charger Operation

• Thermal Shutdown

• Under Voltage Lockout

• 25-Bump Thin DSBGA Package 2.5 x 2.5 mm

• Options Available on Request, Please Contact

Sales Office for Further Information;

– Level Detect on HF_PWR & PWR_ON

– LDO Charging Mode

– Custom Default Settings on Charger, and

LDO O/P's.

APPLICATIONS

• CDMA Phone Handsets

• Low Power Wireless Handsets

• Handheld Information Appliances

• Personal Media Players

• Digital Cameras

KEY SPECIFICATIONS

• 50mA to 950mA Programmable Charge

Current

• 3.0V to 5.5V Input Voltage Range

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

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

DESCRIPTION

The LP3918 is a fully integrated charger and multi- regulator unit designed for CDMA cellular phones.

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

noise low dropout (LDO) voltage regulators and a

high-speed serial interface to program on/off

conditions and output voltages of individual

regulators, and also to read status information from

the PMU.

The Li-Ion charger integrates a power FET, reverse

current blocking diode, sense resistor with current

monitor output, and requires only a few external

components. Charging is thermally regulated to

obtain the most efficient charging rate for a given

ambient temperature.

LDO regulators provide high PSRR and low noise

ideally suited for supplying power to both analog and digital loads.