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G5719C Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc |
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G5719C Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc |
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1 / 1 page  Ver: 0.1 Feb 20, 2014 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G5719C Global Mixed-mode Technology 1MHz, 3A Synchronous Step-Down Regulator Features High Efficiency: Up to 95% Low Quiescent Current: Only 50µA During Op- eration Internal Soft Start Function Output Current G5719CTB1U: 2A Continuous, 3A Peak G5719CRC1U: 3A Continuous 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 Output Short Circuit Latch-off Protection Output Overvoltage Latch-off Protection 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 G5719C is a high efficiency monolithic synchro- nous buck regulator using a constant frequency, cur- rent mode architecture. Supply current during opera- tion is only 50µA and drops to <1µA in shutdown. The 2.5V to 6V input voltage range makes the G5719C ideally suited for single Li-Ion battery-powered applica- tions. 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 capaci- tors. The internal synchronous switch increase effi- ciency and eliminates the need for an external Schot- tky diode. Built-in soft start function eliminates in-rush current that could damage the system. Output latch-off operation protects the step-down regulator from dam- age under short circuit and overvoltage conditions. Ordering Information ORDER NUMBER MARKING OUTPUT VOLTAGE TEMP. RANGE PACKAGE (Green) G5719CTB1U 519Cx Adjustable -40°C to +85°C SOT-23-6 G5719CRC1U 519C Adjustable -40°C to +85°C TDFN2X2-8 Note: TB: SOT-23-6 RC: TDFN2X2-8 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit VIN LX EN VFB GND G5719C C IN 2.2µF CER V IN 4~6V 2.2µH C FB R1 82k R2 18k C OUT 10µF CER V OUT 3.3V 2A * (option) V OUT = 0.6V × ( 1+ ) R1 R2 VFB VIN SOT-23-6 6 4 1 EN 2 3 GND LX G5719C PG 5 R 10k PG V IN TDFN2X2-8 1 2 3 4 8 7 6 5 Thermal Pad G5719C 1 2 3 4 8 7 6 5 Thermal Pad VFB PG VIN GND GND EN LX NC VIN LX EN VFB GND G5719C C IN 2.2µF CER V IN 4~6V 2.2µH C FB R1 82k R2 18k C OUT 10µF CER V OUT 3.3V 2A * (option) V OUT = 0.6V × ( 1+ ) R1 R2 VFB VIN SOT-23-6 6 4 1 EN 2 3 GND LX G5719C PG 5 R 10k PG V IN TDFN2X2-8 1 2 3 4 8 7 6 5 Thermal Pad G5719C 1 2 3 4 8 7 6 5 Thermal Pad VFB PG VIN GND GND EN LX NC |
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