KA7631

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

The KA7631 is a fixed multi-output positive voltage regulator designed to provide precision outputs of 5.1V, 9V, and 12V. It delivers up to 0.5A on the first two outputs and up to 1A on the third output when used with an external PNP transistor. The device includes an internal reset circuit for Output 1, TTL-controlled disable for Outputs 2 and 3, and protection features such as over-voltage, short-circuit, and thermal shutdown.

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

• Provides three fixed precision output voltages: 5.1V, 9V, and 12V
• Includes an internal reset pulse generator for the primary output
• Features TTL input control to independently disable secondary outputs
• Integrates comprehensive protection against over-voltage, short circuits, and thermal overload

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

• Multi-rail power supply systems requiring fixed voltage rails
• Embedded electronics needing integrated reset signaling
• Industrial equipment requiring protected multi-voltage distribution

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

Verify the manufacturer origin, as Fairchild Semiconductor's semiconductor division was acquired by ON Semiconductor. Confirm that the specific part number KA7631 corresponds to the legacy Fairchild specification or the current ON Semiconductor equivalent. Ensure the package type matches the required 10-pin configuration and check for any suffix variations indicating temperature range or tape/reel packaging.

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

Select this component when a compact solution for three fixed voltage rails is required without discrete regulation components. It is suitable for applications where a reset signal for the main rail is necessary. Consider the 0.5A limit for the first two outputs and the need for an external transistor if the third output requires higher current capacity than the internal regulator provides.

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

The KA7631 belongs to the KA7630 series of fixed multi-output regulators manufactured by Fairchild Semiconductor. It is functionally similar to the KA7630 but differs in the second output voltage, providing 9V instead of 8V. This family is designed for simple, cost-effective power management in systems requiring multiple stable voltage levels from a single source.

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

GM7630 is a documented alternative offering identical functionality as a fixed multi-output regulator.