LP3918中文资料电池充电管理和稳压器单元数据手册TI规格书

描述 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.

特性 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.
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
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