TLV431数据手册集成电路（IC）的电压基准规格书PDF

描述 Description

The TLV431 series of parts are precision low voltage shunt regulators that are programmable over a wide voltage range of 1.24V to 16V.The TLV431A series features a guaranteed reference accuracy of 1.0% at 25 °C and 2.0% over the entire industrial temperature range of -40 °C to 85 °C.For TLV431B series, the accuracy is 0.5% and 1.0%, respectively.For the TLV431C series, the accuracy is 0.2% and 0.5%, respectively.These devices exhibit a sharp low current turn-on characteristic with a low dynamic impedance of 0.20 W over an operating current range of 100mA to 20mA.This combination of features makes this series an excellent replacement for zener diodes in numerous applications circuits that require a precise refrence voltage.When combined with an optocoupler, the TLV431 can be used as an error amplifier for controlling the feedback loop in isolated low output voltage (3.0V to 3.3V) switching power supplies.These devices are available in economical TO-92 and micro sizeTSOP-5 and SOT23-3 packages.

特性 Features

• Voltage Reference Tolerance +/-1.0%
• Sharp Low Current Turn-On Characteristic
• Low Dynamic Output Impedance of 0.20 W from 100 mA to 20 mA
• Programmable Output Voltage Range of 1.24 V to 16 V
• Micro Miniature TSOP-5 and TO-92 Packages
• Pb-Free Package is Available
• A = 1.0% tolerance Vref
• B = 0.5% tolerance Vref
• C = 0.2% tolerance Vref

应用 Application

• Low Output Voltage (3.0 V to 3.3 V) Switching Power Supply Error Amplifier
• Adjustable Voltage or Current Linear and Switching Power Supplies
• Voltage Monitoring
• Current Source and Sink Circuits
• Analog and Digital Circuits Requiring Precision References
• Low Voltage Zener Diode Replacements
• Power Supplies
• Smart Phone Charger / Adapters

简介

TLV431属于集成电路（IC）的电压基准。由制造生产的TLV431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。