AT1691 致新代理商 GMT DC-DC系列 同步降压转换器

Part Number	Vin (V)min.	Vin (V) max.	IOUT (A)	FSW (k Hz)	FB (V)	Dmax (%)	IQ(uA)	Note	Package
AT1691	2.5	5.5	1	1500	0.6	100	50	NC, EN, VIN, LX, GND, FB	TDFN2X2-6

 

1.5MHz, 1A High Efficiency Buck Converter

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

ORDER NUMBER	MARKING	OUTPUT VOLTAGE	TEMP.RANGE	PACKAGE (Green)
AT1691RB1U	A161	Adjustable	40°C~ +85°C	TDFN2X2-6

Note: RB: TDFN2X2-6           
1:  Bonding  Code  U: Tape & Reel

Pin  Configuration           Typical  Application  Circuit   

GMT致新代理商，欢迎咨询13244774414，还有更多精彩致新电源管理IC分享《致新DC-DC》，《DC-DC芯片》。