MC78M18CT Fairchild Semiconductor, MC78M18CT Datasheet

IC REGULATOR 18V 0.5A TO-220

MC78M18CT

Manufacturer Part Number
MC78M18CT
Description
IC REGULATOR 18V 0.5A TO-220
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of MC78M18CT

Regulator Topology
Positive Fixed
Voltage - Output
18V
Voltage - Input
Up to 35V
Voltage - Dropout (typical)
2V @ 500mA
Number Of Regulators
1
Current - Output
500mA
Operating Temperature
0°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-3 (Straight Leads)
Polarity
Positive
Number Of Outputs
1
Output Type
Fixed
Output Voltage
18 V
Output Current
0.5 A
Line Regulation
100 mV
Load Regulation
360 mV
Dropout Voltage (max)
2 V
Input Voltage Max
40 V
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
0 C
Mounting Style
Through Hole
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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Internal Block Digram
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
©2002 Fairchild Semiconductor Corporation
MC78MXX/LM78MXX
3-Terminal 0.5A Positive Voltage Regulator
INPUT
1
STARTING
CIRCUIT
CURRENT
GENERATOR
REFERENCE
VOLTAGE
ERROR
AMPLIFIER
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.
1. Input 2. GND 3. Output
THERMAL
PROTECTION
SOA
PROTECTION
D-PAK
TO-220
1
1
GND
GND
SERIES
PASS
ELEMENT
www.fairchildsemi.com
OUTPUT
R1
R2
3
Rev. 1.0.5
2
GND

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MC78M18CT Summary of contents

Page 1

... Output Transistor Safe Operating Area (SOA)Protection Internal Block Digram INPUT 1 CURRENT GENERATOR REFERENCE STARTING VOLTAGE CIRCUIT ©2002 Fairchild Semiconductor Corporation www.fairchildsemi.com 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 ...

Page 2

MC78MXX/LM78MXX Absolute Maximum Ratings Parameter Input Voltage (for 18V) O (for V = 24V) O Thermal Resistance Junction-Case (Note1) TO-220 (Tc = +25 C) Thermal Resistance Junction-Air (Note1, 2) TO-220 (Ta = +25 C) D-PAK (Ta ...

Page 3

Electrical Characteristics (MC78M06) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout ...

Page 4

MC78MXX/LM78MXX Electrical Characteristics (MC78M08) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection ...

Page 5

Electrical Characteristics (MC78M12) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage V Line Regulation (Note1) V Load Regulation (Note1) V Quiescent Current I Quiescent Current Change Output Voltage Drift V/ T ...

Page 6

Electrical Characteristics (MC78M15) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout ...

Page 7

MC78MXX/LM78MXX Electrical Characteristics (MC78M18) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage V Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Output Voltage Drift V/ T Output Noise ...

Page 8

Electrical Characteristics (MC78M24) (Refer to the test circuits, 0 < T < +125 Parameter Symbol Output Voltage V Line Regulation (Note1) Load Regulation (Note1) Quiescent Current I Quiescent Current Change Output Voltage Drift V/ T Output Noise ...

Page 9

Typical Applications Notes specify an output voltage, substitute voltage value for "XX" 2. Although no output capacitor is needed for stability, it does improve transient response required if regulator ...

Page 10

MC78MXX/LM78MXX 13V < V < 25V I 1 MC78M05 V I LM78M05 C1 0. < -VI < 17V MC78M05 LM78M05 0. LM741 3 4 Figure 4. ...

Page 11

Mechanical Dimensions Package 9.90 0.20 (8.70) ø3.60 0.10 1.27 0.10 2.54TYP [2.54 ] 0.20 10.00 0.20 Dimensions in millimeters TO-220 1.52 0.10 0.80 0.10 +0.10 0.50 –0.05 2.54TYP [2.54 ] 0.20 MC78MXX/LM78MXX 4.50 0.20 +0.10 1.30 –0.05 2.40 0.20 11 ...

Page 12

MC78MXX/LM78MXX Mechanical Dimensions Package 6.60 0.20 5.34 0.30 (0.50) (4.34) MAX0.96 2.30TYP [2.30 0.20] 12 (Continued) Dimensions in millimeters D-PAK (0.50) 0.76 0.10 2.30TYP [2.30 0.20] 6.60 0.20 (5.34) (5.04) (1.50) (2XR0.25) 2.30 0.10 0.50 0.10 0.50 0.10 1.02 0.20 ...

Page 13

... Ordering Information Product Number LM78M05CT Product Number MC78M05CT MC78M06CT MC78M08CT MC78M12CT MC78M15CT MC78M18CT MC78M24CT MC78M05CDT MC78M06CDT MC78M08CDT MC78M12CDT Package Operating Temperature TO-220 0 ~ +125 C Package Operating Temperature TO-220 0 ~ +125 C D-PAK MC78MXX/LM78MXX 13 ...

Page 14

... MC78MXX/LM78MXX DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ...

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