Description

The SC431 is a three terminal adjustable shunt regulator with thermal stability guaranteed over temperature. The output voltage can be adjusted to any value from 2.5V (VREF) to 30V with two external resistors. The SC431 has a typical dynamic output impedance of 0.25Ω. Active output circuitry provides a very sharp turn on characteristic, making the SC431 an excellent replacement for zener diodes.

Features

◆ Wide operating current range 130µA to 150mA

◆ Low dynamic output impedance 0.25 Ω typ.

◆ Trimmed bandgap design + 0.5

◆ Alternate for TL1431, TL431, LM431 & AS431

◆ Industrial temperature range

◆ Available in SOT-23-3 and SO-8 packages. Also available in Lead-free, fully WEEE and RoHS compliant.

Applications

◆ Linear Regulators

◆ Adjustable Supplies

◆ Switching Power Supplies

◆ Battery Operated Computers

◆ Instrumentation

◆ Computer Disk Drives

SC431属于集成电路（IC） > 电压基准。Semtech Corporation制造生产的SC431电压基准产品属于基准电压源系列，可通过相对较不稳定的电源提供稳定的电势，电压值始终保持恒定，以便在测量、控制和类似应用中用作比较的标准。其功能行为可能与用于大功率调节的线性稳压器相似，但基准电压源器件却不适合用于此类用途。用作比较标准时，若输出电流容量或实际负载电流增大，其性能通常会降低。