LP3918TL NSC [National Semiconductor], LP3918TL Datasheet
LP3918TL
Manufacturer Part Number
LP3918TL
Description
Battery Charge Management and Regulator Unit
Manufacturer
NSC [National Semiconductor]
Datasheet
1.LP3918TL.pdf
(30 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LP3918TLX
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LP3918TLX-A
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LP3918TLX/NOPB
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NS/国半
Quantity:
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© 2007 National Semiconductor Corporation
LP3918
Battery Charge Management and Regulator Unit
General Description
The LP3918 is a fully integrated charger and multi-regulator
unit designed for CDMA cellular phones. The LP3918 con-
tains a Li-Ion battery charger, 7 low noise low dropout (LDO)
voltage regulators and a high-speed serial interface to pro-
gram on/off conditions and output voltages of individual reg-
ulators, 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 suit-
ed for supplying power to both analog and digital loads.
Applications
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Simplified Functional Block Diagram
CDMA Phone Handsets
Low Power Wireless Handsets
Handheld Information Appliances
Personal Media Players
Digital Cameras
202116
Features
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Key Specifications
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Fully integrated Li-Ion battery charger with thermal
regulation
USB Charge Mode.
7 Low Noise LDO’s
I2C compatible interface for controlling LDO outputs and
charger operation
Thermal shutdown
Under Voltage Lockout
25-bump Thin micro-SMD 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.
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
2 x 300 mA
3 x 150 mA
2 x 80 mA
20211601
www.national.com
October 2007