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LP3918

Part Number	LP3918
Manufacturer	Texas Instruments
Description	Battery Charge Management/Regulator
Published	Jul 9, 2020
Detailed Description	LP3918 www.ti.com SNVS476D – AUGUST 2007 – REVISED MAY 2013 LP3918 Battery Charge Management and Regulator Unit Check...
Datasheet	LP3918 PDF File

Overview

LP3918 www.
ti.
com SNVS476D – AUGUST 2007 – REVISED MAY 2013 LP3918 Battery Charge Management and Regulator Unit Check for Samples: LP3918 FEATURES 1 •2 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 multiregulator 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.
Functional Block Diagram AC Adapter Li - Ion Charger +- I/O Interface of Baseband Processor Ichg Monitor Serial Interface Control 7 x LDO BB Processor Power Domains Memory RF Peripheral Devices Figure 1.
Simplified Functional Block Diagram 1 Please be awar...

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