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MC78MXX/LM78MXX
3-Terminal 0.5A Positive Voltage Regulator
Features
• Output Current up to 0.5A •...
www.fairchildsemi.com
MC78MXX/LM78MXX
3-Terminal 0.5A Positive Voltage
Regulator
Features
Output Current up to 0.5A Output Voltages of 5, 6, 8, 12, 15, 18, 24V Thermal Overload Protection Short Circuit Protection Output
Transistor Safe Operating Area (SOA)Protection
Description
The MC78MXX/LM78MXX series of three-terminal positive
regulators are available in the TO-220/D-PAK package with several fixed output voltages making it useful in a wide range of applications.
TO-220
GND
1
D-PAK GND
1 1. Input 2. GND 3. Output
Internal Block Digram
INPUT 1
CURRENT GENERATOR
STARTING CIRCUIT
REFERENCE VOLTAGE
SERIES PASS ELEMENT
SOA PROTECTION
ERROR AMPLIFIER
THERMAL PROTECTION
©2002 Fairchild Semiconductor Corporation
OUTPUT 3
R1
R2
GND 2
Rev. 1.0.5
MC78MXX/LM78MXX
Absolute Maximum Ratings
Parameter
Input Voltage (for VO = 5V to 18V) (for VO = 24V)
Thermal Resistance Junction-Case (Note1) TO-220 (Tc = +25°C) Thermal Resistance Junction-Air (Note1, 2) TO-220 (Ta = +25°C) D-PAK (Ta = +25°C)
Operating Junction Temperature Range
Storage Temperature Range
Note: 1. Thermal resistance test board
Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume no ambient airflow
Symbol VI VI
RθJC
RθJA
TOPR TSTG
Value 35 40
2.5
66 92 0 ~ +150 -65 ~ +150
Unit V V
°C/W
°C/W
°C °C
Electrical Characteristics (MC78M05/LM78M05)
(Refer to the test circuits, 0 < TJ < +125°C, IO=350mA, VI=10V, unless otherwise specified, CI = 0.33µF, CO=0.1µF)
Parameter Out...