Low Knee Current 2.5/2.495V Adjustable Shunt Regulator
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The AP431S/AP431SH is a 3-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 makes it ideal substitute for Zener diode in applications such as switching power supply, charger and other adjustable regulators.
The AP431S/AP431SH has the same electrical specifications as the industry standard 431 except that it features a low minimum cathode current for regulation. The typical value of 50μA makes the parts ideal for very low power dissipation applications.
The output voltage of the AP431S/AP431SH can be set to any value between VREF (2.5V/2.495V) and the corresponding maximum cathode voltage (36V).
The AP431S/AP431SH is offered in two grade initial voltage tolerance at +25°C, 0.5% and 1%.
This IC is available in 3 packages: TO-92 (Ammo Packing), SOT23 and SOT89.
| Type | Shunt regulator |
|---|---|
| Compliance (Only Automotive supports PPAP) | Standard |
| AEC Qualified | No |
| ReferenceVoltage (V) | 2.5, 2.495 V |
| Tolerance (%) | 0.5, 1 % |
| Maximum Input Voltage (V) | 40 V |
| Sink Current (mA) | 100 mA |
| Minimum Cathode Current for Regulation Typ (µA) | 50 µA |
| Typical Temperature Coefficient (ppm/°C) | 27 ppm/°C |
| Maximum Slope Resistance (Ω) | 0.3 Ω |
| Operating Ambient Temperature Range (°C) | -40 to 125 °C |
