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

應(yīng)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

簡(jiǎn)介

TLV431屬于集成電路（IC）的電壓基準(zhǔn)。由制造生產(chǎn)的TLV431電壓基準(zhǔn)產(chǎn)品屬于基準(zhǔn)電壓源系列，可通過(guò)相對(duì)較不穩(wěn)定的電源提供穩(wěn)定的電勢(shì)，電壓值始終保持恒定，以便在測(cè)量、控制和類(lèi)似應(yīng)用中用作比較的標(biāo)準(zhǔn)。其功能行為可能與用于大功率調(diào)節(jié)的線性穩(wěn)壓器相似，但基準(zhǔn)電壓源器件卻不適合用于此類(lèi)用途。用作比較標(biāo)準(zhǔn)時(shí)，若輸出電流容量或?qū)嶋H負(fù)載電流增大，其性能通常會(huì)降低。