KA7631TS

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

The KA7631TS is a fixed multi-output positive voltage regulator manufactured by onsemi (formerly Fairchild Semiconductor). It provides three regulated outputs: Output 1 at 5.1V ±2% with up to 0.5A current, Output 2 at 9V ±2% with up to 0.5A current, and Output 3 at 12V ±2% capable of delivering up to 1A when used with an external PNP transistor. The device operates within a junction temperature range of 0°C to +125°C and features integrated protection mechanisms including thermal shutdown, overvoltage protection, and short-circuit protection for each output.

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

• Provides three fixed precision output voltages (5.1V, 9V, and 12V) in a single package
• Includes internal reset circuitry that generates a pulse when Output 1 drops below the regulated value
• Features TTL-compatible disable inputs for controlling Output 2 and Output 3
• Integrates comprehensive protection against overvoltage, short circuits, and thermal overload

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

• Multi-rail power supply systems requiring simultaneous 5V, 9V, and 12V rails
• Industrial control units needing integrated voltage regulation and reset generation
• Embedded systems utilizing TTL logic for output enable/disable functions

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

Verify the manufacturer origin as this component was originally produced by Fairchild Semiconductor before its acquisition by onsemi. Confirm the specific suffix indicates the correct 10-SIP-H/S package type. Ensure the application environment remains within the specified 0°C to +125°C operating temperature range to maintain guaranteed electrical characteristics.

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

Select the KA7631TS when a design requires three distinct fixed voltage rails without the complexity of discrete regulator components. Choose this part if the system necessitates a hardware reset signal derived from the primary 5.1V rail. Consider the external transistor requirement for achieving the maximum 1A current on the third output channel.

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

This component belongs to the KA7630/KA7631 family of fixed multi-output regulators. The KA7631 variant is distinguished by its 9V second output, whereas the KA7630 provides an 8V output. Both share identical pinouts, protection features, and package dimensions, allowing for functional substitution where voltage levels permit.

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

The KA7630 serves as a direct substitute if the secondary 8V output is acceptable instead of 9V. Verify that any replacement maintains the 10-SIP-H/S package form factor and matches the required current capabilities for all three channels.