G961 Global Mixed-mode Technology Inc. 1A Low Dropout Regulator with Enable Features General Description The G961 is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage at up to 1 Amps. Since it has superior dropout characteristics compared to regular LDOs, it can be used to supply 2.5V on motherboards or 1.5V, 1.8V on peripheral cards from the 3.3V supply thus allowing the elimination of costly heatsinks. An enable pin further reduces power dissipation while shut down. The G961 provides excellent regulation over variations in line, load and temperature. Adjustable Output from 1.2V to 4.8V Using External Resistors 1.5V, 1.8V and 2.5V Options by Setting ADJ Pin Below 0.2V Over current and over temperature protection 400mV dropout @1A Enable pin 10µA quiescent current in shutdown SOT-89-5 Package Applications The SOT-89-5 is available with 1.5V, 1.8V and 2.5V internally preset outputs that are also adjustable using external resistors. Battery powered systems Motherboards Peripheral cards Network cards Set Top Boxes Medical Equipment Notebook Computers Ordering Information ORDER NUMBER (Pb free/Green) MARKING TEMP. RANGE PACKAGE G961-15ADJTEUf 961-15 -40°C ~ +85°C SOT-89-5 G961-18ADJTEUf 961-18 -40°C ~ +85°C SOT-89-5 G961-25ADJTEUf 961-25 -40°C ~ +85°C SOT-89-5 Note: TE: SOT-89-5 U : Tape & Reel e.g. 18 denotes the 1.8V output voltage. Pin Configuration Typical Application Circuit IENH R3 5 VEN VEN G961 VIN G961 VEN VIN VIN 4 VO VO R1 C1 22µF GND ADJ C2 47µF R2 1 ADJ 2 3 GND VO SOT-89-5 1.2 (R1+R2) Volts R2 R2=12kΩ is recommended VO = R3 should be connected for current IENH restriction as VEN > VIN+0.3V TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.5 Mar 15, 2011 1