Specification	LP3921SQX/NOPB

Battery Chemistry	Lithium Ion
Battery Pack Voltage	4.2 V
Charge Current - Max [Max]	950 mA
Current - Charging	Constant - Programmable
Fault Protection	Reverse Current, Over Temperature
Interface	I2C
Mounting Type	Surface Mount
Number of Cells	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Supplier Device Package	32-WQFN (5x5)
Voltage - Supply (Max)	5.5 V

LP3921 Series

Battery Charger Management and Regulator Unit with Integrated Boomer Audio Amplifier

Part	Charge Current - Max [Max]	Battery Chemistry	Supplier Device Package	Fault Protection	Mounting Type	Current - Charging	Number of Cells	Voltage - Supply (Max)	Interface	Operating Temperature [Max]	Operating Temperature [Min]	Battery Pack Voltage
Texas Instruments LP3921SQX/NOPB	950 mA	Lithium Ion	32-WQFN (5x5)	Over Temperature Reverse Current	Surface Mount	Constant - Programmable	1	5.5 V	I2C	85 °C	-40 °C	4.2 V
Texas Instruments LP3921SQ/NOPB	950 mA	Lithium Ion	32-WQFN (5x5)	Over Temperature Reverse Current	Surface Mount	Constant - Programmable	1	5.5 V	I2C	85 °C	-40 °C	4.2 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	4500	$ 1.47
Texas Instruments	LARGE T&R	1	$ 2.54
		100	$ 2.23
		250	$ 1.56
		1000	$ 1.26

Description

General part information

LP3921 Series

The LP3921 is a fully integrated charger and multi-regulator unit with a fully differential Boomer audio power amplifier designed for CDMA cellular phones. The LP3921 has a high-speed serial interface which allows for the integration and control of a Li-Ion battery charger, 7 low-noise low-dropout (LDO) voltage regulators and a Boomer audio amplifier.

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.

Documents

Technical documentation and resources

Battery Charger Management & Regulator Unit w/Integrated Boomer Audio Amplifier datasheet (Rev. A)

Data sheet