MC7805ACTG

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

The MC7805ACTG is a monolithic integrated circuit fixed-voltage linear regulator from the MC7800A series by onsemi. It provides a nominal 5 V output with a maximum current capability exceeding 1.0 A when adequately heatsinked. The device operates within an input voltage range of 7.5 V to 25 V and features internal thermal overload protection, short-circuit current limiting, and output transistor safe-area compensation. Packaged in TO-220 (T suffix), it supports surface mount or through-hole installation and includes ESD protection exceeding 2000 V per MIL_STD_883.

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

• Internal thermal overload protection shuts down the circuit during excessive power conditions
• Internal short-circuit current limiting protects against output faults
• Output transistor safe-area compensation reduces short-circuit current as voltage across the pass transistor increases
• No external components required for standard fixed-voltage regulation applications

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

• Local on-card voltage regulation
• Pre-regulator stages for switching regulators
• Power supply sections requiring stable DC voltage conversion

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

Verify the specific suffix 'A' indicates the AC tolerance grade (4%) distinct from the standard C or B grades. Confirm the T suffix corresponds to the TO-220 package variant. Ensure the ordering part number matches the exact datasheet revision and manufacturer specifications before finalizing procurement to avoid functional mismatches.

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

Select this component for applications requiring a robust 5 V rail with over 1 A current capacity. The MC7805ACTG offers tighter voltage tolerance compared to standard variants. Consider thermal management requirements carefully, as power dissipation limits depend on ambient temperature and heatsinking capabilities inherent to the TO-220 package.

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

This device belongs to the broader MC7800 family of positive voltage regulators. The MC7805ACTG specifically denotes the 5 V output version with AC tolerance specifications. It shares architectural similarities with other members like the MC7805BTG but differs in voltage accuracy and potentially sourcing availability within the onsemi portfolio.

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

MC7805CTG

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

What is the purpose of the input bypass capacitor?

An input bypass capacitor, typically 0.33 µF or larger, is recommended if the regulator is located at a distance from the power supply filter or if long wire lengths are used, ensuring high-frequency stability.

How does the device handle short circuits?

The regulator incorporates internal short-circuit current limiting that restricts the maximum current passed during a fault condition, protecting both the device and the load.