描述 Description

The AS431I is a three-terminal adjustable shunt regulator with guaranteed thermal stability over a full operation range. It features sharp turn-on characteristics, low temperature coefficient and low output impedance, which make it ideal substitute for Zener diode in applications such as switching power supply, charger and other adjustable regulators. The output voltage of AS431I can be set to any value between VREF (2.5V) and the corresponding maximum cathode voltage (36V). The AS431I is offered in two grade initial voltage tolerance at 25°C, 0.5%, and 1%. This IC is available in 3 packages: TO-92 (bulk or ammo packing), SOT-23 and SOT-89.

特性 Features

Programmable Precise Output Voltage from 2.5V to 36V
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\t\tHigh Stability Under Capacitive Load
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\t\tLow Minimum Cathode Current for Regulation: 10μA (Typ), 50μA (Max.)
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\t\tLow Temperature Deviation: 4.5mV Typical
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\t\tSink Current Capacity from 50Ω A to 100mA
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\t\tLow Output Noise
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\t\tWide Operating Range: -40°C to 125°C

應(yīng)用 Application

Charger
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\t\tVoltage Adapter
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\t\tSwitching Power Supply
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\t\tGraphic Card
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\t\tPrecision Voltage Reference