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Power Management IC (PMIC) for Hard Drive Based Portable Media Players

Qty Price
1-9 $4.68
10-24 $4.21
25-99 $3.93
100-249 $3.52
250-499 $3.29
500-749 $2.86
750-999 $2.48
1000+ $2.43


  • 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

Texas Instruments  LP3910SQ-AN/NOPB

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.

For all available packages, see the orderable addendum at the end of the data sheet.