G5725 Global Mixed-mode Technology 1MHz 1A Synchronous Step-Down Regulator General Description Features 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, extending 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. 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 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 Pin Configuration Typical Application Circuit G5725 G5725 EN GND LX 1 VIN 4~6V 5 3 2.2µH CFB * (option) CIN 2.2µF CER 4 LX VIN VFB 2 3 4 1 EN VFB GND VIN 2 SOT-23-5/TSOT-23-5 VOUT = 0.6V × (1+ R1 R2 VOUT 3.3V 300mA COUT 10µF CER 5 R1 R2 82k 18k ) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.0 May 04, 2012 1 G5725A Global Mixed-mode Technology 1MHz 1.5A Synchronous Step-Down Regulator General Description Features The G5725A 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 G5725A 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 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. High Efficiency: Up to 93% Low Quiescent Current: Only 50µA During Operation Internal Soft Start Function 1.5A 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 Ordering Information ORDER NUMBER MARKING OUTPUT VOLTAGE TEMP. RANGE PACKAGE (Green) G5725AT11U 57AAx Adjustable -40°C~ +85°C SOT-23-5 G5725ATO1U 57AAx Adjustable -40°C~ +85°C TSOT-23-5 For other output voltage, please contact us at [email protected] Note:T1: SOT-23-5 TO:TSOT-23-5 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit G5725A G5725A EN GND LX 1 VIN 4~6V 5 3 2.2µH CFB * (option) CIN 2.2µF CER 4 LX VIN VFB 2 3 4 1 EN VFB GND VIN 2 SOT-23-5/TSOT-23-5 VOUT = 0.6V × (1+ R1 R2 VOUT 3.3V 300mA COUT 10µF CER 5 R1 R2 82k 18k ) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Dec 14, 2011 1