View ap432 datasheet:

AP432/AP432A Adjustable Precision Shunt Regulator Features General Description - Precision reference voltage The AP432/432A are 3-terminal adjustable AP432 : 1.24V ± 1% precision shunt regulators with guaranteed stable temperature over the applicable extended AP432A : 1.24V ± 0.5% commercial temperature range. The output voltage - Sink current capability: 200mA. may be set at any level greater than 1.24\/ (VREF) up - Minimum cathode current for regulation: 150µA to 20V merely by selecting two external resistors - Equivalent full-range temp coefficient: 30 ppm/oC that act as a voltage divider network. These devices - Fast turn-on Response. have a typical output impedance of 0.2Ω. Active - Low dynamic output impedance: 0.2Ω output circuitry prov