ZR431L Datasheet | Diodes Incorporated

Description Pin Assignments The ZR431L is a three terminal adjustable shunt regulator offering excellent temperature stability and output current handling capability up to 25m A. The output voltage may be set to any chosen voltage between 1.24 and 10 volts by selection of two external divider resistors. The devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. The ZR431L is particularly used in the feedback control loop of switch mode power supplies. In this application the device 1.24 volt reference enables the generation of low voltage supplies, typically 3.3 volts or 3 volts. (Top View) VREF 1 VZ 2 3 GND SOT23 Features - 2.5% and 1% Tolerance - Max. Temperature Coefficient 50ppm/°C - Temperature pensated for Operation over The Full Temperature Range - Programmable Output Voltage - 100μA to 100m A Current Sink Capability - Surface Mount SOT23 Package - Totally Lead-Free & Fully Ro HS pliant (Notes 1 & 2) - Halogen and Antimony Free. “Green” Device (Note 3) Applications - Shunt Regulator - Series Regulator - Voltage Monitor - Over Voltage/ Under Voltage Protection - Switch Mode Power Supplies Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (Ro HS) & 2011/65/EU (Ro HS 2) pliant. 2. See http://.diodes./quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony pounds. Typical Applications Circuit V+ VREF R1 R2 VOUT V+ VREF R1 R2 VOUT VOUT...