AZ431BR-ATRE1 Diodes Incorporated

Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431-B General Description Features The AZ431-B is a three-terminal adjustable shunt regu- Programmable Precise Output Voltage from 2.5V lator with guaranteed thermal stability over a full oper- to 18V ation range. It features sharp turn-on characteristics, High Stability under Capacitive Load low temperature coefficient and low output impedance, Low Temperature Deviation: 4.5mV Typical which make it ideal substitute for Zener diode in appli- Low Equivalent Full-range Temperature Coeffi- cations such as switching power supply, charger and o cient with 20PPM/ C Typical other adjustable regulators. Sink Current Capacity from 1mA to 100mA Low Output Noise The output voltage of AZ431-B can be set to any value o between V (2.5V) and the corresponding maximum Wide Operating Range of -40 to 125 C REF cathode voltage. Applications The AZ431-B precision reference is offered in two voltage tolerance: 0.4% and 0.8%. Charger Voltage Adapter This IC is available in 4 packages: TO-92 (bulk or Switching Power Supply ammo packing), SOT-23, SOT-23-5 and SOT-89. Graphic Card Precision Voltage Reference SOT-89 TO-92(Bulk Packing) TO-92(Ammo Packing) SOT-23-5 SOT-23 Figure 1. Package Types of AZ431-B Dec. 2012 Rev. 3.3 BCD Semiconductor Manufacturing Limited 1 Data Sheet ADJUSTABLE PRECISION SHUNT REGULATORS AZ431-B Pin Configuration K Package R Package N Package (SOT-23-5) (SOT-89) (SOT-23) ANODE 3 NC 1 5 ANODE 2 * (Note 1) 1 23 REF CATHODE 34 1 2 REF ANODE CATHODE CATHODE REF Note 1: Pin 2 is attached to substrate and * must be connected to ANODE or open Z Package Z Package (TO-92(Bulk Packing)) (TO-92(Ammo Packing)) 3 CATHODE CATHODE 3 2 ANODE 2 ANODE 1 REF 1 REF Figure 2. Pin Configuration of AZ431-B (Top View) Functional Block Diagram CATHODE + REF - V REF ANODE Figure 3. Functional Block Diagram of AZ431-B Dec. 2012 Rev. 3.3 BCD Semiconductor Manufacturing Limited 2