AQ431R

AQ431R 2.5V Shunt Ref/Amplifier TO-92 and SOT23 Package Preliminary Specification Revision 1.6 June 15, 2007 General Description The AQ431R is a three-terminal adjustable shunt regulator based on a highly stable bandgap reference and is an excellent replacement for standard TL431 references when used as a secondary feedback element in Switch Mode Power Supplies. The AQ431R meets all of the requirements of the standard 431 specifications that are needed to monitor the secondary output voltage and provide the feedback signal to the primary through an opto-coupler. It is offered in both the very popular SOT23-3 and TO-92 packages. Applications • Power supply control loop • Low TC voltage reference • Power management applications Features • Programmable precise output voltage • • • • • 2.5V to 15V Wide temp range: -40º to 85ºC standard Improved stability with capacitive loads Low TC voltage reference Wide range of package options RoHS compliant Pin Configuration Pin Descriptions Pin Name CATH REF ANODE Function Output and supply terminal, must be greater than 2.5V for normal operation Input, nominally 2.495V in normal operation. Ground and Substrate www.acutechnology.com AQ431R Acutechnology Semiconductor Inc. AQ431R Ordering Information Device AQ431R AQ431R Operating Tj -40C˚ ≤ 85C˚ -40C˚ ≤ 85C˚ %Tol 1.5 1.5 PKG Type TO-92-3 TO-92-3 VOUT 2.5V 2.5V 2.5V Wrap BULK T&R T&R Ordering Number AQ431REX-N3-25-BUL AQ431REX-N3-25-TRL AQ431REX-M3-25-TRL AQ431R -40C˚ ≤ 85C˚ 1.5 SOT-23-3 Note: All parts are Lead Free and RoHS compliant. Absolute Maximum Ratings Stress greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These stress ratings only, and functional operation of the device at these or any conditions beyond those indicated under recommended Operating Conditions is not implied. Exposure to “Absolute Maximum Rating” for extended periods may affect device reliability. Use of standard ESD handling precautions is required. Parameter CATH Voltage REF Current CATH, ANODE Currents Operating Junction Temperature Lead Temperature (soldering 10 seconds) Storage Temperature Range ESD Rating (HBM) Value 18 10 100 150 260 -65 to +150 3 Units V mA mA ºC ºC ºC KV Electrical Specifications Electrical characteristics are guaranteed over the full temperature range –40ºC