| Regulated outputs (#) | 4 |
| Vin (Min) (V) | 2.5 |
| Vin (Max) (V) | 6 |
| Iout (Max) (A) | 1 |
| Rating | Catalog |
| LDO | 2 |
| Iq (Typ) (mA) | 0.03 |
| Features | Comm Control, Enable, Power Sequencing |
| Shutdown current (ISD) (Typ) (uA) | 30 |
| Switching frequency (Typ) (kHz) | 2000 |
| Configurability | Factory programmable, Software configurable |
- 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
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.