AP1122EG-13 Diodes Incorporated

AP1122 1A LOW DROPOUT POSITIVE REGULATOR Description Pin Assignments AP1122 is a low dropout positive fixed-mode regulator with (Top View) 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC 3 V IN applications such as high-speed bus termination and low current 1.2V logic supply. AP1122 is also well suited for other 2 V OUT applications such as VGA cards. AP1122 is guaranteed to 1 have lower than 1.3V dropout at full load current making it GND ideal to provide well-regulated outputs of 1.2 output voltage Tab is V OUT with 2.5V input voltage supply. SOT223-3L Applications (Top View) V 3 IN PC peripheral Communication 2 V OUT Features 1 GND 1.3V maximum dropout at full load current Fixed 1.2V 2% output voltage Tab is V OUT Fast transient response TO252-3L/ TO263-3L Output current limiting Built-in thermal shutdown (Top View) Good noise rejection Packages: SOT223-3L, TO252-3L, SOT89-3L, TO263-3L and TO220-3L 3 V IN SOT89-3L, SOT223-3L and TO252-3L: Available in 2 Green Molding Compound (No Br, Sb) V OUT Lead Free Finish/ RoHS Compliant (Note 1) 1 GND Tab is V OUT SOT89-3L ( Top View) 3 V IN 2 V OUT 1 GND Tab is V OUT TO220-3L Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at AP1122 1A LOW DROPOUT POSITIVE REGULATOR Typical Application Circuit 2.5V C1 100uF V IN V OUT 1.2V/1A C2 GND 100uF Tab is V OUT Pin Descriptions Pin Name I/O Pin Description GND I 1 Ground Pin The output of the regulator. A minimum of 10uF capacitor (0.15 ESR 20 ) V O 2 OUT must be connected from this pin to ground to insure stability. The input pin of regulator. Typically a large storage capacitor is connected from V I 3 this pin to ground to insure that the input voltage does not sag below the IN minimum dropout voltage during the load transient response. Functional Block Diagram V 3 2 V IN OUT + + + 1.2V CURRENT LIMIT + Thermal Shutdown 1 GND 2 of 11 May 2010 AP1122 Diodes Incorporated www.diodes.com Document number: DS31012 Rev. 9 - 2