AT1691 致新代理商 GMT DC-DC系列同步降压转换器

General Description
The AT1691 provides complete control for a DC/DC converter optimized for high-performance microproc-essor applications. It is operated on current mode ar-chitecture for excellent line and load transient re-sponse. 1.5MHz operation frequency is allowing the use of small surface mount inductor and capacitor. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. The AT1691 is a family of low-noise synchronous step-down DC/DC converters that is ideally suited for systems powered from a 1-cell Li-ion battery or from a 3-cell to 4-cell NiCd, NiMH, or alkaline battery. It can also be used to USB-Based power system.

Features
Input voltage: 2.5V ~5.5V
High efficiency (95%)
No Schottky Diode Required
1A Output Current at 5V Input 3.3V Output
1.5MHz Switching Frequency
Built-in ON/OFF Function
Low Dropout Operation: 100% Duty Cycle
Thermal Protection
Tiny 6-Lead TDFN2X2 Package
RoHS Compliant

Applications
Mobile Phones
Wireless and DSL modems
Power Supply for Portable Devices

Ordering Information