AP1122EG-13

AP1122 1A LOW DROPOUT POSITIVE REGULATOR Description AP1122 is a low dropout positive fixed-mode regulator with 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC 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 with 2.5V input voltage supply. Pin Assignments (Top View) 3 2 1 Tab is VOUT SOT223-3L VIN VOUT GND Applications • • PC peripheral Communication (Top View) 3 2 VIN VOUT GND Features 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 2 1 Tab is VOUT SOT89-3L ( Top View) VIN VOUT GND 3 2 1 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. 1 of 11 www.diodes.com VIN VOUT GND AP1122 Document number: DS31012 Rev. 9 - 2 May 2010 © Diodes Incorporated AP1122 1A LOW DROPOUT POSITIVE REGULATOR Typical Application Circuit 2.5V C1 100uF VIN VOUT GND Tab is VOUT C2 100uF 1.2V/1A Pin Descriptions Pin Name GND VOUT I/O I O Pin # 1 2 Ground Pin 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. 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. Description VIN I 3 Functional Block Diagram V IN 3 2 V OUT + + CURRENT LIMIT 1.2V + + Thermal Shutdown 1 GND 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 Max 1.0 125 Unit A o C Output Current Operating Junction Temperature Range Electrical Characteristics (Under Operating Conditions) Parameter Output Voltage Line Regulation Load Regulation Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current (Note 4) Thermal Regulation Ripple Rejection Temperature Stability Test Conditions 2.5V≦VIN≦12V, IO=10mA, TA=25 C 2.5V≦VIN≦12V, IO=10mA, TA=25oC VIN=2.5V~12V, 10mA