APW8822A

APW8822/A/B/C System Power PWM Controller for Notebook Computers 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 VIN 6V~25V VLDO5 VOUT1 ENILIM1 EN LDO ENILIM2 Q1 LDO5 LDO3 VLDO3 Q3 L1 PWM1 PWM2 L2 VOUT2 Q2 Q4 Charge Pump - 100mA Low Dropout Regulator (LDO5) with Fixed C1 D2 D3 C3 D4 VCP 5V Output - 100mA Low Dropout Regulator (LDO3) with Fixed D1 C2 C4 3.3V Output - 270kHz Clock Signal for 15V Charge Pump (Used General Description VOUT1 as Its Power Supply) The APW8822/A/B/C integrates dual step-down, constant- Excellent Line/Load Regulations about ±1.5% Over- on-time, synchronous PWM controllers (that drives dual Temperature Range N-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 Compensation 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 Th...