General Description

The APW1172 is a step down monolithic power switching regulator with a switching current limit of 3.8A so it is able to deliver more than 2.5ADC current to the load depending on the application conditions. The output voltage can be set from 1.235V to 22V.The high current level is also achieved utilize an SO8 package with exposed pad frame. The type of package allowsto re-ducetheRth (j-amb) downtoapproximately 45°C/W.

特性 Features

? 2.5A Internal Switch

? Operating Input Voltage from 4.8V to 22V

? 3.3V ±2 Reference Voltage

? Output Voltage : APW1172 - adjustable from 1.235V to 20V

? Low Dropout Operation: 100 Duty Cycle

? 250KHz Internally Fixed Frequency

? Voltage Feed-Forward

? Zero Load Current Operation

? Internal Current Limit

? Inhibit for Zero Current Consumption

? Synchronization

? Protection Against Feedback Disconnection

? Thermal Protection

? External Soft-Start

? Over-Voltage Protection

? Lead Free Available (RoHS Compliant)

Applications

? Consumer: STB, DVD, TV, VCR, Car Radio, LCD monitors

? Networking: XDSL, Modems, DC-DC Modules

? Computer: Printers, Audio/Graphic Cards, Optical Storage, Hard Disk Drive

? Industrial: Chargers, Car Battery DC-DC Converters