LM431AM/TR

The LM431A 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 LM431A can be set to any value between Vref (2.5V) and the corresponding maximum cathode voltage (40V). The LM431A is offered in two grade initial voltage tolerance at 25%, 0.5% and 1.0%. This IC is available in 4 packages: SOP-8, TO-92 (bulk or ammo), SOT-23 and SOT-89. LM431A 是三端可调的，全温度范围稳定的并联调整器。具有快速启动、低温漂和低输出阻抗的特性，在开关电源、充电和其他可调调整器应用中是齐纳二极管的理想替代器件。 输出电压范围为 Vref (2.5V)到最大阴极电压(36V)。0.5% 和 1.0% 两种精度（25°C）。5 种封装：TO-92 (bulk 或 ammo)，SOT-23，SOP8 和 SOT-89。

• 可编程精确的输出电压：2.5V - 36V Programmable Precise Output Voltage from 2.5V to 36V
• 低阴极电流 : 150uA(典型) Low Minimum Cathode Current for Regulation: 150µA(Typ.)
• 低温漂: 5mV (典型) Low Temperature Deviation: 4mV Typical
• 电流能力: 150µA - 100mA Sink Current Capacity from 150µA to 100mA
• 低输出噪声 Low Output Noise
• 宽工作温度范围 Wide Operating Range: -25°C to 125°C
• 任意容性负载下都能保证稳定工作 Tolerates Capacitive Loads

• 充电 Charger
• 电压适配器 Voltage Adapter
• 开关电源 Switching Power supply
• 图形卡 Graphic Card
• 精确电压基准 Precision Voltage Reference