APW7108 Description
The APW7108 is a dual-channel, constant on-time, and synchronous PWM controller which drives dual Nchannel MOSFETs for each channel. The APW7108 steps down high voltage of a battery to generate low-voltage chipset or RAM supplies in notebook puters. The APW7108 provides excellent transient response and accurate DC voltage output in either PFM or PWM mode.
APW7108 Key Features
- Adjustable Output Voltage up to 5.5V
- 0.9V Reference Voltage
- ±1% Accuracy Over Temperature
- Operates from an Input Battery Voltage Range of 5V to 24V or from 3.3V/5V System Rail
- Power-On-Reset Monitoring on VCC Pin
- Selectable Forced PWM or Automatic PFM/PWM
- Constant-On-Time Control Scheme
- Switching Frequency pensation for PWM Mode
- Constant Switching Frequency (CH1: 345kHz, CH2: 255KHz) in PWM Mode with DC Output Current
- Excellent Line and Load Transient Responses