US431L

US431L/431AL LOW -VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR PRELIMINARY DATASHEET FEATURES SOT23-5 package 0.5% Voltage Reference Initial Accuracy (US431AL) Low Operational Cathode Current (80 uA max) Unconditionally Stable with only 1uF Adjustable Output from 1.24V to 6V 0.25Ω Typical Output Impedance Pin to Pin Compatible with TLV431 DESCRIPTION The US431L product is a 3 terminal adjustable shunt regulator that can also be used as a precision voltage reference. Its output voltage may be set to any value between Vref(1.24V) and 6V with two external resistors as shown in the typical application circuit. Other applications of this device include the use as a merged amplifier and reference in applications such as Linear regulator or as the secondary side controller in low voltage power supply applications. The US431L only requires 80uA maximum quiescent current before regulating, making it ideal as a voltage reference for battery type applications. APPLICATIONS Precision Voltage Reference Linear Regulator Controller Secondary Side Controller for the Low Voltage Power Supply Applications TYPICAL APPLICATION RB V IN R1 VO US431 R2 Co R1   Vo = Vref ×  1 +   R2  431app1-1.0 Typical application of the US431L as a shunt regulator / voltage reference. PACKAGE ORDER INFORMATION Ta (°C) 0 TO 70 0 TO 70 5 LEAD SOT23-5 US431LCL US431ALCL 3 PIN PLASTIC TO-92 US431LCZ US431ALCZ 8 PIN PLASTIC SOIC US431LCS US431ALCS Rev. 1.2 5/11/98 2-1 US431L/431AL ABSOLUTE MAXIMUM RA...