Description

The SC453 IC is a single chip high-performance Hysteretic PWM controller. With its integrated SmartDriver™, it pow ers advanced graphics and core processors. It provides sleep mode and boot voltage support. Automatic power save is present to prevent negative current flow in the

low-side FET during light loading conditions saving even more power. The high side driver initially turns on with a weak drive to reduce ringing, EMI, and capacitive turn-on of the low side.

Features

High Speed Hysteretic Controller

Single Phase Operation

Selectable Analog or VID Controlled Sleep Setting

6 Bit VID programmable Output

Integrated Drivers with Soft-High Side Turn-On

Programmable Soft-Start

Programmable Boot Voltage

Programmable Sleep Voltage with Sleep Mode

Under-Voltage Lockout on VCCA

Over-voltage Protection on CORE

Current Limit Protection on CORE

Thermal Protection

Power Good Flag with Blanking During VCORE Changes

Automatic Power Save at Light Load TSSOP-28 Package

Applications

Low Power Notebook and Laptop Computers

Embedded Applications