LP3910 Datasheet, PDF (1/72 Pages) Texas Instruments – Power Management IC for Hard-Drive-Based Portable Media Players

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LP3910
SNVS481M – NOVEMBER 2006 – REVISED DECEMBER 2015
LP3910 Power Management IC for Hard-Drive-Based Portable Media Players
1 Features
•1 Two Low-Dropout Regulators With Programmable
Output Voltages:
– LDO1 for General Purpose Applications
– LDO2 for Low-Noise Analog Applications
• Green and Red LED-Charger Status Drivers
• 4-Channel 8-Bit Dual Slope
Analog-to-Digital (ADC) Converter
• 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
• USB and Adapter Charging
• 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
• Selectable 0.05C and 0.1C End-of-Charge (EOC)
Current
• USB Current Limits of 100, 500, and 800 mA
• USB Pre-Qualification Current of 50 mA
• Selectable 4.1-V, 4.2-V or 4.38-V Battery-
Termination Voltages
• 0.35% Battery-Termination Accuracy
• ±1 LSB INL/DNL on 8-Bit ADC
2 Applications
• Hard Drive-Based Media Players
• Portable Gaming Players
• Portable Navigation Devices
3 Description
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.
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.
The LP3910 is available in a thermally-enhanced
6-mm × 6-mm × 0.8-mm 48-pin WQFN package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LP3910
WQFN (48)
6.00 mm × 6.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Block Diagram
USB Controller
LP3910
Buck1
Apps Processor
Battery
Battery Monitor
Buck2
LDO1
Memory
Touch
ACDC Wall Adapter
Linear Charger
LDO2
Buck-Boost
Audio
HDD
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.