G5177C/G5177CF11U Global Mixed-mode Technology
Sync. Rectifier Step Up Converter

G5177C线路图

G5177C内部引脚图

Features 
?  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 
?  500KHz 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 Com-
pensation for Excellent Line and Load Tran-
sient Response 
?  Overload/Short-Circuit Protection with hiccup 
control 
?  Shutdown Current <1?A 
?  Thermal Shutdown 
?  Compact 8 pin,SOP8 (FD) package 
Application 
?  iPad-like computers, smart phones and port-
able handheld devices.

General Description 
The G5177C is a compact, high-efficiency, synchro-nous 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 G5177C uses 
only 70μA (typ) quiescent current and allows the con-verter to switch only when needed at no load and light 
loads, and when load is higher than 100mA, it uses 
fixed-frequency PWM technique at500KHz. It features 
a current mode control for fast transient response with 
internal compensation. The G5177C includes cy-cle-by-cycle current limit to maximum inductor current 
and over-temperature protection circuit. The G5177C 
is suitable for iPad-like computers, smart phones and 
portable handheld devices. 
The G5177C is available in a SOP8 (FD) package. The 
operating temperature range is from -20°C to +85°C.