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PDF MC78M18CT Data sheet ( Hoja de datos )
| Número de pieza | MC78M18CT | |
| Descripción | 3-Terminal 0.5A Positive Voltage Regulator | |
| Fabricantes | Fairchild | |
| Logotipo |  |
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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
1 page  
MC78MXX/LM78MXX
Electrical Characteristics (MC78M12) (Continued)
(Refer to the test circuits, 0 < TJ < +125°C, IO=350mA, VI=19V, unless otherwise specified, CI =0.33µF, CO=0.1µF)
Parameter
Output Voltage
Line Regulation (Note1)
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Short Circuit Current
Peak Current
Symbol
VO
∆VO
∆VO
IQ
∆IQ
∆V/∆T
VN
RR
VD
ISC
IPK
Conditions
TJ = +25°C
IO = 5mA to 350mA
VI = 14.5V to 27V
IO = 200mA
TJ = +25°C
VI = 14.5V to 30V
VI = 16V to 30V
IO = 5mA to 0.5A, TJ = +25°C
IO = 5mA to 200mA, TJ = +25°C
TJ =+25°C
IO = 5mA to 350mA
IO = 200mA
VI = 14.5V to 30V
IO = 5mA
TJ = 0 to +125°C
f = 10Hz to 100kHz
f = 120Hz, IO = 300mA
VI = 15V to 25V, TJ =+25 °C
TJ =+25°C, IO = 500mA
TJ = +25°C, VI = 35V
TJ = +25°C
Min. Typ. Max. Unit
11.5 12 12.5
11.4 12 12.6
V
- - 100
mV
- - 50
- - 240
mV
- - 120
- 4.1 6.0 mA
- - 0.5
mA
- - 0.8
- -0.5 - mV/°C
- 75 - µV/Vo
- 80 - dB
-2-
- 300 -
- 700 -
V
mA
mA
Note:
1. Load and line regulation are specified at constant junction temperature. Change in Vo due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
5
5 Page 
Mechanical Dimensions
Package
9.90 ±0.20
(8.70)
ø3.60 ±0.10
TO-220
MC78MXX/LM78MXX
Dimensions in millimeters
4.50 ±0.20
1.30
+0.10
–0.05
1.27 ±0.10
2.54TYP
[2.54 ±0.20]
1.52 ±0.10
0.80 ±0.10
2.54TYP
[2.54 ±0.20]
0.50
+0.10
–0.05
2.40 ±0.20
10.00 ±0.20
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MC78M18CT.PDF ] | |
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