G5699 台湾致新代理商 GMT DC-DC系列 PMIC

General Description
The G5699 is a dual channel high efficiency monolithic synchronous buck regulator using a constant fre-quency, current mode architecture. Supply current during operation is only 50μA and drops to <1μA in shutdown for each channel. The 2.7V to 5.5V input voltage range makes the G5699 ideally suited for sin-gle Li-Ion battery-powered applications. Both regula-tors have independent input and enable pins. 100% duty cycle provides low dropout operation, extending battery run time in portable systems. Switching fre-quency 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. The G5699 is available in TDFN3X3-12 package.

Features
High Efficiency: Up to 95%
Internal Soft Start Function
Output Current
Channel 1: 1A
Channel 2: 1A
2.7V to 5.5V 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

Ordering Information