AP1122EG-13

AP1122 1A LOW DROPOUT POSITIVE REGULATOR Description Pin Assignments AP1122 is a low dropout positive fixed-mode regulator with 1A output current capability. The product is specifically (Top View) designed to provide well-regulated supply for low voltage IC 3 VIN 2 VOUT 1 GND applications such as high-speed bus termination and low current 1.2V logic supply. AP1122 is also well suited for other applications such as VGA cards. AP1122 is guaranteed to have lower than 1.3V dropout at full load current making it ideal to provide well-regulated outputs of 1.2 output voltage Tab is VOUT with 2.5V input voltage supply. SOT223-3L Applications • • (Top View) VIN 3 PC peripheral Communication 2 VOUT Features GND 1 • • • • • • • • • 1.3V maximum dropout at full load current Fixed 1.2V± 2% output voltage Fast transient response Output current limiting Built-in thermal shutdown Good noise rejection Packages: SOT223-3L, TO252-3L, SOT89-3L, TO263-3L and TO220-3L SOT89-3L, SOT223-3L and TO252-3L: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1) Tab is VOUT TO252-3L/ TO263-3L (Top View) 3 VIN 2 VOUT 1 GND Tab is VOUT SOT89-3L ( Top View) 3 VIN 2 VOUT 1 GND Tab is VOUT TO220-3L Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. AP1122 Document number: DS31012 Rev. 9 - 2 1 of 11 www.diodes.com May 2010 © Diodes Incorporated AP1122 1A LOW DROPOUT POSITIVE REGULATOR Typical Application Circuit 2.5V C1 100uF VIN VOUT 1.2V/1A C2 100uF GND Tab is VOUT Pin Descriptions Pin Name I/O Pin # Description GND I 1 Ground Pin VOUT O 2 The output of the regulator. A minimum of 10uF capacitor (0.15Ω ≤ ESR ≤ 20Ω) must be connected from this pin to ground to insure stability. VIN I 3 The input pin of regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response. Functional Block Diagram V IN 3 2 V OUT 1 GND + + 1.2V + CURRENT LIMIT + Thermal Shutdown AP1122 Document number: DS31012 Rev. 9 - 2 2 of 11 www.diodes.com May 2010 © Diodes Incorporated AP1122 1A LOW DROPOUT POSITIVE REGULATOR Absolute Maximum Ratings Symbol VIN TST TMJ Parameter DC Supply Voltage Storage Temperature Maximum Junction Temperature Rating -0.3 to 12 -65 to +150 150 Unit V o C o C Recommended Operating Conditions Symbol IOUT TOP Parameter Min 0 Output Current Operating Junction Temperature Range Max 1.0 125 Unit A o C Electrical Characteristics (Under Operating Conditions) Parameter Test Conditions o Output Voltage 2.5V≦VIN≦12V, IO=10mA, TA=25 C Line Regulation 2.5V≦VIN≦12V, IO=10mA, TA=25oC Load Regulation Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current (Note 4) Thermal Regulation Ripple Rejection Temperature Stability VIN=2.5V~12V, 10mA