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LP3910
SNVS481M –NOVEMBER 2006–REVISED DECEMBER 2015
LP3910 Power Management IC for Hard-Drive-Based Portable Media Players
1 Features
2 Applications
1
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Two Low-Dropout Regulators With Programmable
Output Voltages:
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Hard Drive-Based Media Players
Portable Gaming Players
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LDO1 for General Purpose Applications
LDO2 for Low-Noise Analog Applications
Portable Navigation Devices
3 Description
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Green and Red LED-Charger Status Drivers
4-Channel 8-Bit Dual Slope
Analog-to-Digital (ADC) Converter
The LP3910 is a programmable system power
management unit optimized for HDD-based portable
media players. The device incorporates two low-
dropout LDO voltage regulators, two integrated buck
DC-DC converters with dynamic voltage scaling
(DVS), one wide load-range buck-boost DC-DC
converter with programmable output voltage, a 4-
channel, 8-bit ADC, and a dual-source lithium-ion or
lithium-polymer battery charger.
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2 High-Efficiency DVS Buck Converters
Wide Load Range Buck-Boost DC-DC Converter
400-kHz I2C-Compatible Interface
Linear Constant-Current and Constant-Voltage
Charger for Single-Cell Lithium-Ion Batteries
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USB and Adapter Charging
The LP3910 also incorporates some advanced
battery management functions such as battery
temperature measurement, reverse current blocking
for USB, LED-charger status indication, thermally
regulated internal power FETs, battery-voltage
monitoring, overcurrent protection, and a 10-hour
safety timer. The device is programmable through a
400-kHz I2C-compatible interface.
System Power Supply Management
Voltage and Thermal Supervisory Circuits
Continuous Battery Voltage Monitoring
Interrupt Request Output With 8 Sources
50-mΩ Battery Path Resistance
100-mA to 1000-mA Full-Rate Charge Current
Using Wall Adapter
The LP3910 is available in a thermally-enhanced
6-mm × 6-mm × 0.8-mm 48-pin WQFN package.
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Selectable 0.05C and 0.1C End-of-Charge (EOC)
Current
Device Information(1)
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USB Current Limits of 100, 500, and 800 mA
USB Pre-Qualification Current of 50 mA
PART NUMBER
LP3910
PACKAGE
BODY SIZE (NOM)
WQFN (48)
6.00 mm × 6.00 mm
Selectable 4.1-V, 4.2-V or 4.38-V Battery-
Termination Voltages
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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0.35% Battery-Termination Accuracy
±1 LSB INL/DNL on 8-Bit ADC
Simplified Block Diagram
[t3910
USB Controller
Apps Processor
Buck1
Buck2
Memory
Touch
Audio
HDD
Battery
Battery Monitor
Linear Charger
LDO1
LDO2
ACDC Wall Adapter
Buck-Boost
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.