G973 Global Mixed-mode Technology 4A Low Dropout Regulator with Enable Features General Description Adjustable Output Low to 0.8V 330mV Dropout @ 4A, VO 1.2V Over Current and Over Temperature Protection Enable Pin Low Reverse Leakage (Output to Input ) Power SOP-8 (FD) Packages with Thermal Pad ±2% Output Voltage VO Power OK Signal 1.2V Options by Setting ADJ Pin Below 0.2V and Adjustable Externally Using Resistors VO Pull Low Resistance when Disable VO Soft Start when Enable The G973 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 4 amps. It operates with VPP voltage 5V and output voltage programmable as low as 0.8V. The G973 features ultra low dropout, ideal for applications where VOUT is very close to VIN. Additionally, the G973 has an enable pin to further reduce power dissipation while shutdown. The G973 provides excellent regulation over variations in line, load and temperature. The G973 provides a power OK signal to indicate if the voltage level of VO reaches 92% of its rating value. Applications The G973 is available in the power SOP-8 (FD) package. It is available with 1.2V internally preset outputs that are also adjustable using external resistors. Motherboards Peripheral Cards Network Cards Set Top Boxes Notebook Computers Ordering Information ORDER NUMBER MARKING G973-120ADJF11U 973-120 TEMP. RANGE PACKAGE (Green) -40°C~+85°C SOP-8 (FD) Note: F1: SOP-8 (FD) 1: Bonding Code U : Tape & Reel e.g. 120 denotes the 1.20V output voltage Pin Configuration Typical Application Circuit G973 10kΩ VPP (5V) VPP G973 GND ADJ 2 Thermal Pad VIN VEN 8 1 POK VEN 7 POK VO 3 6 VPP VO 4 5 VIN VIN VIN VO VO C1 (optional) CPP 1µF CIN 20µF R1 GND ADJ CO 20µF 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 Oct 25, 2011 1