AQ120

AQ120 LDO Regulator Controller SOT23-5 Package Preliminary Specification Revision 1.2 April 1, 2006 General Description The AQ120 is a low cost LDO controller. The AQ120 flexibility allows the setting of the output voltage and controls up to 2 Amps of output current with a minimum number of external components. The open collector output is capable of driving an external PNP transistor. A temperature stable bandgap reference (1.25 V) controls the output voltage and is programmable through two external resistors. The AQ120 if offered in the very small SOT23-5 package. Applications • Graphic cards • PC motherboards • Switching power supply post-regulation • Telecom equipment • DVD video player Features • 1.25V reference with 1.5% accuracy • Low current consumption • Offered in small SOT23-5 package • Wide Vin range: 2.5V to 18V • 20mA drive current sink • RoHS compliant available Pin Configuration Block Diagram www.acutechnology.com AQ120 Acutechnology Semiconductor Inc. AQ120 Typical Application Note: The values of R1and R2 set the output voltage. The typical Vref is 1.25V Pin Descriptions Pin 1 2 3 4 5 Pin Name DRIVE GND GND BIAS VCC VREF Function Output of error amplifier. 20 mA sink capability to drive PNP pass element Ground Must connect to GND for proper operation as an LDO Controller Positive supply Voltage programming pin; has a threshold of 1.25V. Ordering Information Device AQ120 AQ120 Note: The Operating Tj -40C˚ ≤ 85C˚ -40C˚ ≤ 85C˚ %Tol 1.5 1.5 Pkg Type SOT-23-5 SOT-23-5 VOUT 1.25V 1.25V Wrap T&R T&R Order Number AQ120EX-M5-AJ-TR AQ120EX-M5-AJ-TRL TRL parts are Lead Free and RoHS compliant. 2 Rev. 1.2 April 1, 2006 www.acutechnology.com Acutechnology Semiconductor Inc. AQ120 Absolute Maximum Ratings Parameter VCC Voltage DRIVE Voltage REF Voltage VCC, DRIVE, REF Current Operating Junction Temperature Lead Temperature (soldering 10 seconds) Storage Temperature Range Value 18 18 18 50 150 300 -80 to +150 Units V V V mA ºC ºC ºC Electrical Specifications Electrical characteristics are guaranteed over the full temperature range –40ºC