G5695 Global Mixed-mode Technology 1.4MHz 1A Synchronous Step-Down Regulator General Description Features 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. 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 Ordering Information ORDER NUMBER MARKING OUTPUT VOLTAGE TEMP. RANGE G5695T11U 5695x Adjustable -40°C~ +85°C SOT-23-5 G5695TO1U 5695x Adjustable -40°C~ +85°C TSOT-23-5 5695 TO:TSOT-23-5 Adjustable RB: TDFN2X2-6 -40°C~ +85°C TDFN2X2-6 G5695RB1U Note:T1: SOT-23-5 1: Bonding Code U: Tape & Reel Pin Configuration PACKAGE (Green) Typical Application Circuit G5695 G5695 G5695 VIN GND EN 1 5 LX 2 3 4 NC 1 EN 2 VIN 3 VIN 4~6V 6 Thermal Pad 1 5 VFB 5 GND 4 LX 2.2µH CFB * (option) CIN 2.2µF CER 3 EN VFB GND VFB 2 TDFN2X2-6 SOT-23-5/TSOT-23-5 LX VIN Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. VOUT = 0.6V × (1+ R1 R2 VOUT 3.3V 300mA COUT 10µF CER 4 R1 R2 82k 18k ) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Apr 17, 2013 1