GMT G5695TO1U 1.4MHz 1A Synchronous Step-Down Regulator

General Description  

The G5695 is a high efficiency monolithic synchronous  buck regulator using a constant frequency, current  mode architecture. Supply current during operation is  only 50µA and drops to <1µA in shutdown. The 2.5V  to 6V input voltage range makes the G5695 ideally  suited for single Li-Ion battery-powered applications.  100% duty cycle provides low dropout operation, extending battery run time in portable systems. Switching  frequency is internally set at 1.4MHz, allowing the use  of small surface mount inductors and capacitors. The  internal synchronous switch increase efficiency and  eliminates the need for an external Schottky diode.  Built-in soft start function eliminates in-rush current  that could damage the system.

Features  

• High Efficiency: Up to 93%  

•  Low Quiescent Current: Only 50µA During Operation  

•  Internal Soft Start Function  

• 1A Output Current  

• 2.5V to 6V Input Voltage Range  

• 1.4MHz Switching Frequency  

• No Schottky Diode Required  

• 100% Duty Cycle in Dropout Operation  

•  0.6V Reference Allows Low Output Voltages  

• <1µA Shutdown Current  

• Current Mode Operation for Excellent Line and  Load Transient Response  

• Over Temperature Protected  

•  RoHS Compliant  Applications  

•  Cellular Telephones  

•  Personal Information

Appliances  

•  Microprocessors and DSP Core Supplies  

• Wireless and DSL Modems  

•  Digital Still and Video Cameras 

•  MP3 Players  

• Portable Instruments