Packaging information
| Package | Pins DSBGA (YZR) | 25 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 250 | SMALL T&R |
Features for the LP3918
- Fully Integrated Li-Ion Battery Charger with Thermal Regulation
- USB Charge Mode
- 7
Low Noise LDO’s
- 2 x 300 mA
- 3 x 150 mA
- 2 x 80 mA
- I2C Compatible Interface for Controlling LDO Outputs and Charger Operation
- Thermal Shutdown
- Under Voltage Lockout
- 25-Bump Thin DSBGA 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.
Key Specifications
- 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
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Description for the LP3918
The LP3918 is a fully integrated charger and multi-regulator unit designed for CDMA cellular phones. The LP3918 contains a Li-Ion battery charger, 7 low noise low dropout (LDO) voltage regulators and a high-speed serial interface to program on/off conditions and output voltages of individual regulators, 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 suited for supplying power to both analog and digital loads.