1N5290-1

Overview

The Microchip Technology 1N5290-1 is a high source impedance current regulator diode designed for stable current control across varying voltage conditions. It operates within a maximum anode-to-cathode voltage of 100V and dissipates up to 500mW of power. The device regulates a nominal current of 517µA with a maximum voltage drop of 1.05V. Constructed using silicon technology, it supports junction temperatures ranging from -65°C to 175°C. The component is available in the DO-204AA (DO-7) axial leaded package, suitable for through-hole mounting in commercial and military-grade applications.

Feature Summary

• Provides constant current regulation over a broad voltage range, serving as a functional counterpart to Zener diodes which regulate voltage.
• Features high source impedance characteristics to maintain stable current output despite fluctuations in supply voltage or load.
• Utilizes a double-plug internal bond connection within the larger DO-7 packaging to support its unique current limiting function.

Applications

• Constant current sources for LED driving and biasing circuits
• Current limiting protection in sensitive electronic loads
• Biasing elements for transistor amplifier stages

Procurement Notes

Verify the specific suffix designation when ordering, as the base part number may correspond to different qualification levels such as JAN, JANTX, or JANS. Confirm that the required version meets the necessary environmental and reliability standards for the intended deployment environment before finalizing procurement.

Selection Notes

Select this component when a stable current reference is required independent of voltage variations. Ensure the circuit design accommodates the 500mW power dissipation limit and the 100V maximum voltage rating. Verify that the DO-7 package dimensions fit the available PCB space and that the operating temperature range aligns with the system's thermal constraints.

Part Context

This device belongs to the 1N5283-1 through 1N5314-1 series of 0.5-watt current regulators produced by Microchip Technology. The series offers a selection of regulated currents ranging from 0.22 mA to 4.7 mA in standard 10% tolerances. These devices are commonly used in axial-leaded packages to provide current regulation similar to how Zener diodes provide voltage regulation.

Replacement Considerations

Direct substitutes include other parts from the 1N5283-1 to 1N5314-1 series if the current value matches. For equivalent performance from other manufacturers, verify that the replacement diode shares the 517µA regulation current, 500mW power rating, and 100V breakdown voltage specifications.