G5719 Global Mixed-mode Technology 1MHz, 2A Synchronous Step-Down Regulator General Description Features The G5719 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 G5719 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 95% Low Quiescent Current: Only 50µA During Operation Internal Soft Start Function 2A 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) G5719TB1U 5719x Adjustable -40°C to +85°C SOT-23-6 Note: TB: SOT-23-6 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit G5719 G5719 EN 1 6 VFB 4 VIN 4~6V LX VIN 3 2.2µH CFB * (option) GND LX 5 2 3 4 NC CIN 2.2µF CER 1 EN VIN VFB GND SOT-23-6 VOUT = 0.6V • (1+ R1 R2 VOUT 3.3V 2A COUT 10µF CER 6 R1 R2 82k 18k ) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Oct 19, 2012 1 G5719A Global Mixed-mode Technology 1MHz, 2A Synchronous Step-Down Regulator General Description Features The G5719A 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 G5719A 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 95% Low Quiescent Current: Only 50µA During Operation Internal Soft Start Function 2A 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 Power Good 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) G5719ATB1U 519Ax Adjustable -40°C to +85°C SOT-23-6 Note: TB: SOT-23-6 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit G5719A G5719A EN 1 6 VFB 4 VIN 4~6V VIN PG LX GND LX 5 2 3 4 SOT-23-6 PG CIN 2.2µF CER 1 EN VIN VOUT = 0.6V • (1+ R1 R2 ) GND VFB 5 3 R 10k VIN 2.2µH CFB * (option) VOUT 3.3V 2A COUT 10µF CER 6 R1 R2 82k 18k TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Oct 22, 2012 1