DESCRIPTION

The A431L is a three-terminal Adjustable Shunt Voltage Reference. Output can be set to any value between VREF (1.24V) and 18V with two external resistors (see Figure 2).

The A431L operate from a lower voltage (1.24V) than the widely use A431, A431A and A432A shunt-regulator reference.

The A431L has a typical output impedance of 0.5Ω. Active output circuitry provides a very sharp turn-on characteristic, making A431L excellent replacements for Zener diodes in many applications, including on-board regulation and adjustable power supplies.

The A431L is available in SOT-23 package.

FEATURES

⚫ Low Voltage Operation: VREF=1.24V

⚫ Adjustable Output Voltage: VREF to 18V

⚫ Reference Voltage Tolerances

-0.5 for A431L-A

-1 for A431L-B

-1.5 for A431L-C

⚫ Low dynamic output impedance: 0.5Ω

⚫ Low output noise voltage

⚫ Fast on -state response

⚫ Sink current capability of 0.1mA to100mA

⚫ Available in SOT 23 package

APPLICATION

⚫ Shunt Regulator

⚫ High-Current Shunt Regulator

⚫ Precision Current Limiter