General Description

The APW7199 is a single-phase, constant-on-time, and synchronous PWM controller, which drives N-channel MOSFETs. An internal 0.5V temperature-compensated reference voltage with high accuracy is designed to meet the requirement of low output voltage applications. The APW7199 steps down high voltage to generate low-volt age chipset or RAM supplies in notebook computers.

Features

· Operates from An Input Battery Voltage Range of +3V to +25V

· ±0.6% 0.5V Reference

  - Over Line, Load Regulation, and Operating Temp.

· Drive Dual Low Cost N-Channel MOSFETs

  - Adaptive Shoot-Through Protection

· Power-On-Reset Monitoring on VCC Pin

· PFM Mode for Increasing Light Load Efficiency

· Constant-On-Time Control Scheme

  - Switching Frequency Compensation for PWM Operation

· 300kHz Constant Switching Frequency

· Integrated MOSFET Drivers and Bootstrap Diode

· Internal Soft-Start and Soft-Stop

· Power Good Monitoring

· 70% Under-Voltage Protection

· 125% Over-Voltage Protection

  - Using Low-Side MOSFET’s RDS(ON)

· Over-Temperature Protection

· TDFN-10 3mmx3mm Package

· Lead Free and Green Devices Available(RoHS Compliant)

Applications

· Notebook

· Low Cost PC

· Wide Input DC/DC Regulators