G977 Global Mixed-mode Technology 7A Low Dropout Regulator with Enable Features General Description The G977 is a high performance positive voltage regulator designed for use in applications requiring very low Input voltage and very low dropout voltage at up to 7 amps. It operates with VPP voltage 5V and output voltage programmable as low as 0.8V. The G977 features ultra low dropout, ideal for applications where VOUT is very close to VIN. Additionally, the G977 has an enable pin to further reduce power dissipation while shutdown. The G977 provides excellent regulation over variations in line, load and temperature. The G977 provides a power OK signal to indicate if the voltage level of VO reaches 92% of its rating value. Adjustable Output Low to 0.8V Input Voltage as Low as 1V and VPP Voltage 5V 140mV Dropout @ 7A, VO 1.05V Over Current and Over Temperature Protection Enable Pin Low Reverse Leakage (Output to Input ) Power SOP-8 (FD) Packages with Thermal Pad ±1.5% Output Voltage VO Power OK Signal VO Pull Low Resistance when Disable VO Soft Start when Enable Applications The G977 is available in the power SOP-8 (FD) package. It is adjustable using external resistors. Motherboards Peripheral Cards Network Cards Set Top Boxes Notebook Computers Ordering Information ORDER NUMBER MARKING G977F11U G977 TEMP. RANGE PACKAGE (Green) -40°C~+85°C SOP-8 (FD) Note: F1: SOP-8 (FD) 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit G977 6 VPP (5V) G977 GND 8 8 1 5 VIN VEN 3,4 VO ADJ 2 VO 3 VO 4 Thermal Pad 7 2 POK C1 (optional) 6 VPP 5 VIN CPP 1µF CIN 22µF R1 VPP POK 7 10kΩ VIN VEN VIN 1 GND VO ADJ CO 22µF R2 Top View SOP-8 (FD) * Thermal Pad can be connected to VIN ** Connect Thermal Pad to ground plate will have better thermal performance 0.8 (R1+R2) Volts, R2<120kΩ is recommended R2 2. C1 is not necessary. VO is also stable if C1 = 22pF~150pF 1. VO = TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Mar 19, 2012 1