BA178M09T

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

The BA178M09T is a three-terminal linear voltage regulator manufactured by ROHM Semiconductor. It provides a fixed positive output voltage of 9V with a maximum continuous output current of 500mA. The device operates within an input voltage range up to 24V and features internal protection circuits for overcurrent and thermal shutdown. It is housed in a TO-220FP package with an insulated tab, suitable for through-hole mounting. The component supports an operating temperature range from -40°C to +85°C.

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

• Fixed positive output voltage regulation
• Internal overcurrent and thermal shutdown protection
• Insulated tab package design

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

• General purpose power supply circuits
• Embedded system voltage regulation
• Industrial control equipment power stages

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

Verify the specific suffix 'T' indicates the correct tape-and-reel or bulk packaging configuration as defined by ROHM. Confirm the TO-220FP package variant matches the thermal and mechanical requirements of the target PCB layout. Ensure the fixed 9V output aligns with the load specifications before procurement.

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

Select this component when a stable 9V DC source is required at currents up to 500mA. The TO-220FP package offers electrical isolation for the mounting tab, simplifying heatsink installation without additional insulators. Verify that the input voltage does not exceed the maximum rating to prevent device failure under all operating conditions.

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

This part belongs to the BA178 series of three-terminal positive regulators. It serves as a direct functional equivalent to standard 78L09 devices but utilizes ROHM's specific manufacturing process. The series is designed for applications requiring reliable linear regulation with built-in safety features against overload conditions.

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

Check for compatible substitutes such as the BA78M09FP if different packaging is needed. Verify pinout compatibility with existing designs when considering alternative manufacturers. Ensure replacement parts maintain the same 500mA current capability and 9V fixed output specification.