KA7632

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

The KA7632 is a multi-output positive voltage regulator providing fixed precision outputs of 3.3V and 8V at up to 0.5A, plus a 5.1V output capable of 1A with an external PNP transistor. It features a reset circuit for Output 1, TTL disable inputs for Outputs 2 and 3, and protection against overvoltage, short circuits, and thermal shutdown.

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

• Provides three fixed precision output voltages: 3.3V, 8V, and 5.1V (with external component).
• Includes internal reset generation triggered by Output 1 voltage deviation.
• Supports TTL-level disable control for specific outputs.
• Integrates comprehensive protection mechanisms including thermal shutdown and current limiting.

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

• Multi-rail power supply systems requiring stable voltage rails.
• Embedded logic circuits needing precise 3.3V and 8V supplies.
• Systems utilizing external transistors for higher current loads on the 5.1V rail.

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

Verify the manufacturer origin, as the device was originally produced by Fairchild Semiconductor before integration into onsemi. Confirm the package type is 10-SIP H/S and ensure the operating temperature range meets the application requirements of 0°C to +125°C. Cross-reference datasheet revisions to confirm electrical characteristics match the specific batch.

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

Select this component when multiple regulated voltages are required from a single IC footprint. The KA7632 is suitable for designs needing fixed 3.3V and 8V rails without external feedback resistors. Consider the KA7633 if a 9V output is preferred instead of 8V. Ensure the design accommodates the external PNP transistor requirement for the 1A capability on Output 3.

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

This device belongs to the KA7632/KA7633 family of fixed multi-output regulators. Originally manufactured by Fairchild Semiconductor, these parts were integrated into onsemi's portfolio following corporate acquisitions. The KA7632 specifically denotes the variant with an 8V second output, distinguishing it from the KA7633 which provides 9V.

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

The KA7633 is a direct functional substitute within the same family, differing only in the Output 2 voltage specification (9V vs 8V). Verify pin compatibility and voltage tolerances when substituting.