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G5725 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc |
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G5725 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc |
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1 / 2 page  Ver: 1.0 May 04, 2012 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G5725 Global Mixed-mode Technology 1MHz 1A Synchronous Step-Down Regulator Features High Efficiency: Up to 93% Low Quiescent Current: Only 50µA During Op- eration Internal Soft Start Function 1A Output Current 2.5V to 6V Input Voltage Range 1MHz 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 General Description The G5725 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 G5725 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, ex- tending battery run time in portable systems. Switching frequency is internally set at 1MHz, 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. Pin Configuration Typical Application Circuit VFB VIN SOT-23-5/TSOT-23-5 5 4 1 EN 2 3 GND LX G5725 VIN LX EN VFB GND G5725 C IN 2.2µF CER V IN 4~6V 1 43 5 2.2µH C FB R1 82k R2 18k C OUT 10µF CER V OUT 3.3V 300mA * (option) V OUT = 0.6V × (1+ ) R1 R2 2 VFB VIN SOT-23-5/TSOT-23-5 5 4 1 EN 2 3 GND LX G5725 VIN LX EN VFB GND G5725 C IN 2.2µF CER V IN 4~6V 1 43 5 2.2µH C FB R1 82k R2 18k C OUT 10µF CER V OUT 3.3V 300mA * (option) V OUT = 0.6V × (1+ ) R1 R2 V OUT = 0.6V × (1+ ) R1 R2 2 |
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Similar Description - G5725 |
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