Linear Adjustable Voltage Regulator IC 1.2–37V 1.5A in TO-220AB package

This adjustable linear voltage regulator IC delivers a stable DC output adjustable from 1.2 V to 37 V with a maximum output current of 1.5 A, supplied in a TO-220AB package. The device is intended for use in power supplies, laboratory bench equipment and embedded systems that require a regulated and adjustable voltage source. It provides straightforward implementation using two external resistors to set the output voltage and a metal-backed TO-220AB package for mounting to a heatsink to manage thermal dissipation.

Advantages

The regulator provides a wide output voltage range and moderate current capability in a single compact package, enabling substitution or design of adjustable power rails without complex circuitry. Its linear regulation topology produces low output noise and fast response to load changes compared with switching alternatives for many bench and low-frequency applications. The TO-220AB package simplifies thermal management: the device can be mounted to a heatsink for sustained operation near the specified current. Implementation requires only a pair of external resistors and minimal additional components for basic filtering and protection.

Suitable for

• Variable bench power supplies and laboratory equipment
• Embedded systems requiring an adjustable DC rail
• Prototyping and repair of consumer and industrial electronics
• Low-noise analog circuits and sensor excitation

Key specifications

• Adjustable output voltage range: 1.2 V to 37 V
• Maximum output current: 1.5 A
• Package type: TO-220AB with metal mounting tab for heatsink attachment
• Regulation type: linear adjustable regulator
• Voltage setting method: external resistor divider between output and adjust pin
• Typical use: requires input voltage higher than desired output by the regulator’s dropout margin

How to use

Connect the input pin to an unregulated DC source that exceeds the desired output by the regulator’s dropout voltage plus any margin for stability. Use two external resistors as a divider between output and adjust pin to set the required output voltage according to the standard regulator formula. Include input and output capacitors close to the device terminals to maintain stability and reduce output noise; follow capacitor value recommendations from common linear regulator design practice. Mount the TO-220AB package to an appropriate heatsink if operation approaches the rated current or if the power dissipation is significant.

Usage recommendations

For reliable performance, ensure the input source can supply sufficient headroom and current, place decoupling capacitors near the regulator, and use proper thermal mounting to keep junction temperature within safe limits. Add transient protection or current limiting components in designs where output short circuits or inductive loads are possible.