General Description
The APW7138 is a single-phase, constant-on-time, and synchronous PWM controller which drives N-channel MOSFETs. The APW7138 steps down high voltage of a battery to generate low-voltage chipset or RAM supplies in notebook computers.

FEATUREs
● Adjustable Output Voltage from +0.6V to +3.3V
   - 0.6V Reference Voltage
   - ±1% Accuracy Over Temperature
● Operates from an Input Battery Voltage Range of
   +3V to +25V
● Wide Output Load Range from 0A to 25A
● Power-On-Reset Monitoring on VCC Pin
● Excellent Line and Load Transient Response
● PFM Mode for Increased Light Load Efficiency
● Programmable PWM Frequency from 200kHz to
   600kHz
● Integrated MOSFET Drivers and Bootstrap Diode
● Internal Integrated Soft-Start and Soft-Stop
● Selectable Forced PWM or Automatic PFM/PWM
   Mode (only for QFN4x4-16A and TQFN3x3-16
   Packages)
● Power Good Monitoring
● Fault Identification byPGOOD Pull-Down
   Resistance
● 70% Under-Voltage Protection (UVP)
● 124% Over-Voltage Protection (OVP)
● Adjustable Over-Current Protection (OCP)
   - Sensing Low-Side MOSFET’s Current
● Over-Temperature Protection (OTP)
● SSOP-16, Compact 4mmx4mm QFN-16 (QFN4x4-
   16A), and TQFN3x3-16 Packages
● Lead Free and Green Devices Available
   (RoHS Compliant)

APPLICATIONs
● PCI Express Graphical Processing Unit
● Notebook Adapter
● Auxiliary Power Rail
● VRM