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G5698 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc |
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G5698 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc |
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1 / 1 page  Ver: 0.3 Aug 30, 2010 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G5698 Global Mixed-mode Technology Inc. 1.2MHz, 1.2A Synchronous Step-Down Regulator Features High Efficiency: Up to 95% Low Quiescent Current: Only 50µA During Op- eration Internal Soft Start Function 1.2A Output Current 2.5V to 6V Input Voltage Range 1.2MHz 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 G5698 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 G5698 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 1.2MHz, 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. Ordering Information ORDER NUMBER MARKING OUTPUT VOLTAGE TEMP. RANGE PACKAGE (Green) G5698ADJRE1U 5698A Adjustable -40°C~ +85°C TDFN3X3-10 For other output voltage, please contact us at sales@gmt.com.tw Note: RE: TDFN3X3-10 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit VIN LX EN VFB GND G5698 CIN 2.2µF CER V IN 5V 2.2µH C FB R1 80k R2 18k C OUT 10µF CER VOUT 3.3V 1.2A * (option) VOUT = 0.6V • (1+ ) R1 R2 Note: Recomm end connecting the Thermal Pad to the GND or let it keep floati ng. TDFN3X3-10 4 G5698 1 2 3 8 7 6 NC NC 5 9 10 GND TDFN3X3-10 4 1 2 3 8 7 6 VIN EN NC PGND LX 5 9 10 VFB NC Thermal Pad VIN LX EN VFB GND G5698 CIN 2.2µF CER V IN 5V 2.2µH C FB R1 80k R2 18k C OUT 10µF CER VOUT 3.3V 1.2A * (option) VOUT = 0.6V • (1+ ) R1 R2 VOUT = 0.6V • (1+ ) R1 R2 Note: Recomm end connecting the Thermal Pad to the GND or let it keep floati ng. TDFN3X3-10 4 G5698 1 2 3 8 7 6 NC NC 5 9 10 GND TDFN3X3-10 4 1 2 3 8 7 6 VIN EN NC PGND LX 5 9 10 VFB NC Thermal Pad |
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