AP431I

NOT RECOMMENDED FOR NEW DESIGN USE AP431S AP431i LOW CATHODE CURRENT ADJUSTABLE PRECISION SHUNT REGULATOR Description The AP431i 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. Pin Assignments (Top View) ANODE 3 (Top View) ANODE 3 The AP431i 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 AP431i can be set to any value between VREF (2.5V/2.495V) and the corresponding maximum cathode voltage (36V). 1 REF 2 CATHODE SOT-23 (Package Code: N) (Top View) 1 CATHODE 2 REF SOT-23 (Package Code: N1) (Top View) The AP431i 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), SOT-23 and SOT-89. Features  Low Minimum Cathode Current for Regulation: 50μA (Typ.), 100μA (Max.)  Programmable Precise Output Voltage from 2.5V/2.495V to 36V  High Stability Under Capacitive Load  Low Deviation of Reference Voltage Over Full Temperature Range: 11mV Typical (-40C to +125°C)  Sink Current Capacity from 100µA to 100...