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MC7809CTG

Name: MC7809CTG
Rating: 4.7 (12 reviews)

IC REG LINEAR 9V 1A TO220AB

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製造商。部分 #MC7809CTG
包 TO-220-3
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規格

Package	Tube
ProductStatus	Active
OutputConfiguration	Positive
OutputType	Fixed
NumberofRegulators	1
Voltage-Input(Max)	35V
Voltage-Output(Min/Fixed)	9V
VoltageDropout(Max)	2V @ 1A (Typ)
Current-Output	1A
Current-Quiescent(Iq)	8 mA
PSRR	61dB (120Hz)
ProtectionFeatures	Over Temperature, Short Circuit
OperatingTemperature	0°C ~ 125°C
MountingType	Through Hole
Package/Case	TO-220-3

概述

Description

The MC7809CTG is a fixed 9-volt, positive linear voltage regulator in a TO-220 style package (CTG suffix denotes the package/lead finish). It’s part of the 78xx family and delivers a regulated 9V output with up to about 1 A load current, depending on device and heat sinking.
Key points:
- Input range: up to about 35 V; dropout ≈ 2 V, so ensure input is ≥ around 11 V for stable regulation.
- Protection: thermal shutdown and current limiting for short-circuit/overload protection.
- Pinout (TO-220, facing front): Input, Ground, Output.
- Stability: requires input and output capacitors for proper operation (typical examples: ~0.33 μF input and ~0.1 μF output; larger caps may be used for improved transient response).
- Applications: general-purpose 9V power rails for microcontrollers, analog/digital circuits, lab benches.
Note: exact ratings (max current, allowable input, capacitor values) can vary by manufacturer; consult the specific datasheet for MC7809CTG.

Features

MC7809CTG is a fixed 9V positive voltage regulator (78xx family) in a TO-220 package. Key features:
- Fixed output: 9 V
- Output current: up to about 1 A
- Input range: up to ~35 V
- Dropout voltage: typically ~2 V
- Protection: internal current limit, thermal/shutdown protection, safe-area protection
- Regulation: good line and load regulation
- Stability: requires input/output capacitors for stability (typical inputs around 0.33 µF, output around 0.1 µF)
- Pinout: three-terminal (Input, Ground, Output); tab usually tied to Output
- Suitable for general-purpose low-noise, fixed-voltage applications with modest efficiency needs
(Packaging: commonly TO-220 CTG variant.)

Package

The MC7809CTG comes in a TO-220 package (TO-220AB), through-hole, Pb-free variant (the “G” denotes the Green/Lead-free version).

Pinout

Pin count: 3.
Function/pinout (TO-220 front view):
- Pin 1: Input (Vin)
- Pin 2: Ground (GND)
- Pin 3: Output (Vout, +9V)
MC7809CTG is a fixed +9V voltage regulator.

Manufacturer

Manufacturer: ON Semiconductor (ON Semiconductor Corp).
What kind of company: An American multinational semiconductor manufacturer and supplier of energy-efficient electronics, designing and producing analog, power, and mixed-signal ICs for automotive, industrial, consumer, and computing markets (public company, NYSE: ON).

Application

MC7809CTG is a fixed 9 V positive linear regulator (≈1 A with proper heatsinking). Applications: linear power supplies and post-regulation stages; provide a stable 9 V rail for microcontrollers, op-amps, ADC/DAC and analog front ends; consumer electronics, audio/video gear, instrumentation; embedded/industrial controllers; automotive or battery-powered systems (with adequate cooling).

Equivalent

MC7809CTG is a 9V fixed regulator. Equivalents include: LM7809 (and LM7809CV/LM7809CT variants), L7809CV (ST), KA7809 (Fairchild), MC7809 (Motorola – same family), and NTE7809 (NTE cross-reference). All are 9V fixed regulators in similar packages; check packaging and lead-free requirements for your board.