G954 Global Mixed-mode Technology Inc. 2A Low Dropout Regulator Features General Description The G954 is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage at up to 2 Amps. Since it has superior dropout characteristics compared with regular LDOs, it can be used to supply 2.5V on motherboards or 1.8V on peripheral cards from the power supply thus allowing the elimination of costly heatsinks. The G954 provides excellent regulation over variations in line, load and temperature. It provides over current and over temperature protection functions. Fixed Output Voltage 1.8V and 2.5V Connect ADJ to GND for Fixed Output Mode Adjustable Output Using External Resistors Over Current and Over Temperature Protection Output Current 2A SOP-8 (FD) Package Applications Battery Powered Systems Motherboards Peripheral Cards Network Cards Set Top Boxes Notebook Computers The G954 is available with 1.8V, 2.5V when ADJ pin connected to GND and adjustable outputs using external resistors in SOP-8 (FD) package. Ordering Information ORDER NUMBER MARKING VOLTAGE TEMP. RANGE PACKAGE (Green) G954-18ADJF11U G954-18 1.8V -40°C ~ +85°C SOP-8 (FD) G954-25ADJF11U G954-25 2.5V -40°C ~ +85°C SOP-8 (FD) Note: F1: SOP-8 (FD) 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit G954 G954 NC 8 1 VEN 2 VIN 3 NC 4 Thermal Pad GND 7 ADJ 6 VO 5 NC VEN VEN VIN VIN VO VO R1 C1 10µF GND ADJ C2 10µF R2 SOP-8 (FD) Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. 1.2 (R1+R2) Volts R2 R2=12kΩ is recommended VO = R2=0Ω sets VO to fixed output mode. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.91 Apr 26, 2010 1