KA7630

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The KA7630 is a multi-output positive voltage regulator providing fixed precision outputs of 5.1V at up to 0.5A, 8V at up to 0.5A, and 12V at up to 1A with an external PNP transistor. It features an internal reset circuit for Output 1, TTL input disable for Outputs 2 and 3, and protection against overvoltage, short circuits, and thermal shutdown. The device operates within a junction temperature range of 0°C to +125°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Provides three fixed precision output voltages with integrated current limiting and thermal shutdown protection.
• Includes an internal reset circuit that generates a pulse when Output 1 drops below the regulated value.
• Allows independent disabling of Output 2 and Output 3 via TTL-compatible input signals.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Systems requiring multiple stable DC voltage rails from a single source
• Digital logic circuits needing precise power sequencing and reset generation
• Industrial control modules requiring protected multi-voltage supply architectures

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific manufacturer origin, as the component was originally produced by Fairchild Semiconductor. Confirm package compatibility with the 10-SIP-H/S footprint. Ensure design requirements align with the specified operating temperature range and absolute maximum ratings before integration into final assemblies.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this regulator when a compact solution for three distinct voltage levels is required without discrete regulation components. Consider the external transistor requirement for the 12V rail if load currents exceed 0.5A. Evaluate the reset timing characteristics and disable logic levels against the target system's interface specifications.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This component belongs to the family of fixed multi-output regulators designed for space-constrained applications. It consolidates multiple linear regulation functions into a single SIP package, reducing board area compared to using separate discrete regulators for each voltage rail.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

The KA7631 serves as a direct functional substitute, differing only in the Output 2 voltage specification (9V instead of 8V). Verify pinout and electrical parameters match the existing design constraints before substitution.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

How is the reset signal generated?

An internal reset circuit monitors Output 1 and generates a reset pulse when the voltage decreases below the regulated threshold.

What is the maximum current capability for Output 3?

Output 3 can deliver up to 1A when used with an external PNP transistor.