AP1122E

AP1122 1A LOW DROPOUT POSITIVE REGULATOR Features • • • • • • • • • 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 SOT223-3L and TO252-3L: Available in “Green” Molding Compound (No Br, Sb) (Note 1) Lead Free Finish/RoHS Compliant (Note 2) General 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. Applications • • PC peripheral Communication Ordering Information AP1122XXX Package E : SOT223-3L D : TO252-3L Y : SOT89-3L Lead Free Packing -U : Tube L : Lead Free G : Green (Note 1) -13 : Taping Note: 1. Green is only for SOT223-3L and TO252-3L. 2. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Device (Note 3) AP1122E AP1122D AP1122Y Lead-free Tube/Bulk Package Packaging Quantity Part Number Code (Note 3) Suffix E D Y SOT223-3L TO252-3L SOT89-3L 75 80 NA -U -U NA 13” Tape and Reel Quantity Part Number Suffix 2500/Tape & Reel 2500/Tape & Reel 2500/Tape & Reel -13 -13 -13 Note: 3. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. AP1122 Rev. 2 1 of 9 www.diodes.com FEBRUARY 2007 © Diodes Incorporated AP1122 1A LOW DROPOUT POSITIVE REGULATOR Pin Assignment (1) SOT223-3L (2) TO252-3L ( Top View ) ( Top View ) 3 2 1 Tab is Vout (3) SOT89-3L Vin Vout GND 3 2 1 Tab is Vout Vin Vout GND 3 2 1 Tab is Vout Vin Vout GND Typical Application Circuit 2.5V C1 100uF Vin Vout GND Tab is Vout C2 100uF 1.2V/1A AP1122 Rev. 2 2 of 9 www.diodes.com FEBRUARY 2007 © Diodes Incorporated AP1122 1A LOW DROPOUT POSITIVE REGULATOR Block Diagram Vin 3 2 Vout + + CURRENT LIMIT 1.2V + + Thermal Shutdown 1 GND Pin Descriptions NAME GND Vout Vin I/O I O I PIN # 1 2 3 FUNCTION 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 (0.15Ω ≤ ESR ≤ 20Ω) 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. This pin must always be 1.3V higher than Vout in order for the device to regulate properly. Absolute Maximum Ratings Symbol Vin TST TOP TM Parameter DC Supply Voltage Storage Temperature Operating Junction Temperature Range Maximum Junction Temperature Rating -0.3 to 12 -65 to +150 0 to +125 150 Unit V o C o C oC AP1122 Rev. 2 3 of 9 www.diodes.com FEBRUARY 2007 © Diodes Incorporated AP1122 1A LOW DROPOUT POSITIVE REGULATOR Electrical Characteristics PARAMETER Output Voltage Line Regulation Load Regulation Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current (Note 6) Thermal Regulation Ripple Rejection Temperature Stability (Under Operating Conditions) CONDITIONS 2.5V≦VIN≦12V, TA=25oC IO=10mA, 2.5V