APW8822E
APW8822E is System Power PWM Controller manufactured by ANPEC.
System Power PWM Controller for Notebook puters with Charge Pump
Features
Simplified Application Circuit
- Wide Input voltage Range from 6V to 25V
- Provide 5 Independent Outputs with ±1.0% Accu- racy Over-Temperature
- PWM1 Controller with Adjustable (2V to 5.5V) Output
- PWM2 Controller with Adjustable (2V to 5.5V) Output
- 100m A Low Dropout Regulator (LDO5) with Fixed 5V Output
- 100m A Low Dropout Regulator (LDO3) with Fixed
3.3V Output
- 270k Hz Clock Signal for 15V Charge Pump (Used General Description
VOUT1 as Its Power Supply)
The APW8822E integrates dual step-down, constant-on-
- Excellent Line/Load Regulations about ±1.5% Over- time, synchronous PWM controllers (that drives dual N-
Temperature Range channel MOSFETs for each channel) and two low drop-
- Built in POR Control Scheme Implemented out regulators as well as various protections into a chip.
- Constant On-Time Control Scheme with Frequency The PWM controllers step down high voltage of a battery pensation for PWM Mode to generate low-voltage for NB applications. The output
- Selectable Switching Frequency in PWM Mode of PWM1 and PWM2 can be adjusted from 2V to 5.5V by
- Built-in Digital Soft-Start for PWM Outputs and Soft- setting a resistive voltage-divider from VOUTx to GND.
Stop for PWM Outputs and LDO Outputs
The linear regulators provide 5V and 3.3V output for
- Integrated Bootstrap Forward P-CH MOSFET standby power supply. The linear regulators provide up
- High Efficiency over Light to Full Load Range to 100m A output current. When the PWMx output voltage
(PWMs) is higher than LDOx bypass threshold, the related LDOx
- Built-in Power Good Indicators (PWMs) regulator is shut off and its output is connected to VOUTx
- Independent Enable Inputs (PWMs, LDO) by internal switchover MOSFET. It can save power
- 70% Under-Voltage and 125% Over-Voltage Protec- dissipation. The charge pump circuit with 270k Hz clock tions (PWM)
- Adjustable Current-Limit...
