General Description
The APW7108 is a dual-channel, constant on-time, and synchronous PWM controller which drives dual N-channel MOSFETs for each channel. The APW7108 steps down high voltage of a battery to generate low-voltage chipset or RAM supplies in notebook computers.

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 Mode
· Constant-On-Time Control Scheme
- Switching Frequency Compensation for PWM Mode
- Constant Switching Frequency (CH1: 345kHz, CH2: 255KHz) in PWM Mode with DC Output Current
· Excellent Line and Load Transient Responses
· Adjustable Soft-Start and Soft-Stop
· Power-Good Outputs for both Channels
· Adjustable Current-Limit Protection
- Using Sense Resistor or MOSFET’s RDS(ON)
· 115% Over-Voltage Protection
- No Negative Output Voltage Occurred
· 70% Under-Voltage Protection
· Adaptive Dead-Time Control
- Sensing G-to-S Voltage of Power MOSFETs
· Shutdown Control for both Channels
· 28-pin SSOP (SSOP-28) and 4mmx4mm 24-lead QFN (QFN4x4-24) Packages
· Lead Free and Green Devices Available (RoHS Compliant)

APPLICATIONs
· Note Book Computers
- Chipset/RAM Supplies as low as 0.9V
- 1.8V and 2.5V Supplies
· Step-Down Converters Requiring High Efficiency