G5177B Global Mixed-mode Technology Sync. Rectifier Step Up Converter Features General Description Up to 90% Efficiency at Iout=2A VOUT = 5V from 3.3V Input Low 70μA Quiescent Current Guaranteed 3A Output Current at VOUT = 5V from 3.3V Input 1MHz PWM Switching Frequency Synchronous and Embedded Power Mosfets; No Schottky Diode Required Internal Soft-Start to Limit Inrush Current Adjustable Output Output turn off true shutdown function Current Mode Operation with Internal Compensation for Excellent Line and Load Transient Response Overload/Short-Circuit Protection with hiccup control Shutdown Current <1µA Thermal Shutdown Compact 8 pin,SOP8 (FD) package The G5177B is a compact, high-efficiency, synchronous step-up converter with power Mosfets embedded and with output turn off true shutdown function and adjustable output current limiting with foldback for a single-cell Li-ion/polymer battery. The G5177B uses only 70μA (typ) quiescent current and allows the converter to switch only when needed at no load and light loads, and when load is higher than 100mA, it uses fixed-frequency PWM technique at 1MHz. It features a current mode control for fast transient response with internal compensation. The G5177B includes cycle-by-cycle current limit to maximum inductor current and over-temperature protection circuit. The G5177B is suitable for iPad-like computers, smart phones and portable handheld devices. The G5177B is available in a SOP8 (FD) package. The operating temperature range is from -45°C to +85°C. Application iPad-like computers, smart phones and portable handheld devices. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5177BF11U G5177B 0°C to +85°C SOP-8 (FD) Note: F1:SOP-8 (FD) 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit G5177B LX 1 LX 2 VBAT 3 9 GND Thermal Pad ILM01 4 8 VOUT 7 VOUT 6 FB 5 GND 1,2 CIN 47µF 3 4 LX VOUT 7,8 COUT 68µF R1 VBAT ILM01 FB CC:10pF~30pF R2 GND 5 SOP-8 (FD) Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. CC 6 VOUT=VREF*(1+R1/R2), where VREF typical is 1.23V. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.1 Aug 05, 2013 1