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MC7805BTG

ONMC7805BTG

onsemi
Linear Voltage Regulator IC Positive Fixed 1 Output 1A TO-220
Active13,264 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The MC7805BTG is a monolithic positive voltage regulator designed to provide a fixed 5V output at currents up to 1A. This linear regulator employs internal current limiting, thermal shutdown, and safe-area compensation, making it essentially indestructible under normal operating conditions. It is a through-hole component in a TO-220 package, suitable for a wide range of local on-card regulation tasks.

Why Choose This Part

The device features a high Power Supply Rejection Ratio (PSRR) of 68dB at 120Hz, ensuring low output ripple. It is highly robust with built-in thermal overload and short-circuit protection, requiring only two external capacitors for stable operation. The TO-220 package allows for easy heat sinking to manage thermal dissipation in high-dropout scenarios.

Applications

On-Card Regulation
Used to provide localized 5V power on individual system boards to eliminate noise and distribution problems associated with single-point regulation.
Logic Power Supplies
Ideal for powering 5V digital logic circuits, microcontrollers, and interface ICs from higher voltage DC rails up to 35V.
Power Supply Sub-regulators
Acts as a secondary stage regulator to provide a clean, stable 5V output from a loosely regulated primary DC bus.

Key Specifications

PSRR 68dB (120Hz)
Output Type Fixed
Mounting Type Through Hole
Package / Case TO-220-3
Current - Output 1A
Protection Features Over Temperature, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 35V
Voltage Dropout (Max) 2V @ 1A (Typ)
Supplier Device Package TO-220
Current - Quiescent (Iq) 8 mA
Voltage - Output (Min/Fixed) 5V

Getting Started

When integrating this regulator, place a 0.33uF tantalum or ceramic capacitor on the input and a 0.1uF capacitor on the output as close to the device pins as possible to ensure stability. Ensure the input voltage is at least 7V to maintain regulation, and calculate the required heat sink area based on the power dissipation (Vin - Vout) * Iout.

Part of 78xx Linear Regulators family » MC7805

MC7805 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number PSRR Temp Range Current - Quiescent (Iq) Stock
MC7805BTG (this part) 120Hz -40degC ~ 125degC 8 mA 13,264
MC7805CTG (ON Semiconductor) 120Hz 0degC ~ 125degC 6.5 mA 64,088

Also Consider

L7805CV STMicroelectronics - A widely available 5V 1.5A alternative with very similar electrical characteristics in a TO-220 package.
LM7805CT TITexas Instruments - An industry-standard 5V regulator providing reliable 1A performance with thermal and short-circuit protection.

Categories

Power Management > LDO Voltage Regulators