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PDF MC7818CT Data sheet ( Hoja de datos )

Número de pieza MC7818CT
Descripción (MC78xxCT) 3-Terminal Fixed Positive Voltage Regulators
Fabricantes Vishay 
Logotipo Vishay Logotipo



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New Product
MC78xxCT Series
Vishay Semiconductor
3-Terminal Fixed Positive Voltage Regulators
MC78xxCT
TO-220AB
3
2
1
Pin Definition
1. Input
2. Ground
3. Output
(Heatsink/ tab
connected to pin 2)
Input
Cin
0.33µF
Standard Application
MC78xx
Output
Co
0.1µF
Notes:
A common ground is required between the input and the output voltages.
The input voltage must remain typically 2.0V above the output voltage
even during the low point on the input ripple voltage.
xx = these two digits of the part number indicate output voltage.
Cin is required if regulator is located an appreciable distance from power
supply filter.
Co is not needed for stability, however, it does improve transient response.
Description
These voltage regulators are monolithic integrated circuits
designed as fixed-voltage regulators for a wide variety of
applications including local, on-card regulation. These
regulators employ internal current limiting, thermal shut-
down, and safe-area compensation. With adequate
heatsinking the MC78xxCT can deliver output currents in
excess of 1.5 ampere.
Although designed primarily as a fixed voltage regulator,
these devices can be used with external components to
obtain adjustable voltages with currents.
Features
• Output current in excess of 1.0 ampere
• No external components required
• Internal thermal overload protection
• Internal short-circuit current limiting
• Output transistor safe-area compensation
• Output voltage offered in 2% tolerance
Mechanical Data
Case: TO-220 Package
Case outline is on the back page.
Internal Block Diagram
Input
1
Starting
Circuit
Current
Generator
Series
Pass
Element
SOA
Protection
Reference
Voltage
Error
Amplifier
Thermal
Protection
Output
3
GND
2
Document Number 74813
ww2w9-.NDoavta-0S1heet4U.com
www.DataSheet4U.com
www.vishay.com
1

1 page




MC7818CT pdf
MC78xxCT Series
Vishay Semiconductor
Electrical Characteristics – MC7812
Vin = 19V, Iout = 500mA, 0°C TJ 125°C, Cin = 0.33µF, Cout = 0.1µF; unless otherwise noted.
Parameter
Symbol
Conditions
Min.
Output Voltage
TJ = 25°C
11.76
Vout
14.5V Vin 27V,
5mA Iout 1.0A, PD 15W
11.66
Line Regulation
(TJ = 25°C)
REGline
14V Vin < 30V
15V Vin < 19V
Load Regulation
(TJ = 25°C)
REGload
10mA Iout < 1.5A
250mA Iout < 750mA
Quiescent Current
Iq
Iout = 0, TJ = 25°C
Quiescent Current Change
14.5V Vin 30V
Iq
5mA Iout 1.0A
Output Noise Voltage
Vn 10Hz f 100KHz,TJ= 25°C
Ripple Rejection Ratio
RR f = 120Hz,15V Vin 25V 55
Dropout Voltage
Vdrop
Iout = 1.0A, TJ = 25°C
Output Resistance
Rout
f = 1KHz
Output Short Circuit Current
Ios
TJ = 25°C
Peak Output Current
Io peak
TJ = 25°C
Temperature Coefficient of Output Voltage
Vout/TJ Iout = 5mA,0°C TJ 125°C
Typ.
12.0
10
3
12
4
4.3
75
71
2
18
350
1.5
1
Max.
12.24
12.34
Unit
V
240
mV
120
240
mV
120
8 mA
1
mA
0.5
µV
dB
V
m
mA
A
mV/°C
Electrical Characteristics – MC7815
Vin = 23V, Iout = 500mA, 0°C TJ 125°C, Cin = 0.33µF, Cout = 0.1µF; unless otherwise noted.
Parameter
Symbol
Conditions
Min.
Output Voltage
TJ = 25°C
14.7
Vout
17.5V Vin 30V,
5mA Iout 1.0A, PD 15W
14.55
Line Regulation
(TJ = 25°C)
REGline
17.5V Vin < 30V
13V Vin < 17V
Load Regulation
(TJ = 25°C)
REGload
10mA Iout < 1.5A
250mA Iout < 750mA
Quiescent Current
Iq
Iout = 0, TJ = 25°C
Quiescent Current Change
17.5V Vin 30V
Iq
5mA Iout 1.0A
Output Noise Voltage
Vn 10Hz f 100KHz,TJ= 25°C
Ripple Rejection Ratio
RR f = 120Hz, 18V Vin 28V 54
Dropout Voltage
Vdrop
Iout = 1.0A, TJ = 25°C
Output Resistance
Rout
f = 1KHz
Output Short Circuit Current
Ios
TJ = 25°C
Peak Output Current
Io peak
TJ = 25°C
Temperature Coefficient of Output Voltage
Vout/TJ Iout = 5mA,0°C TJ 125°C
Typ.
15.0
11
3
12
4
4.4
90
70
2
19
230
1.5
1
Max.
15.3
15.45
Unit
V
300
mV
150
300
mV
150
8 mA
1
mA
0.5
µV
dB
V
m
mA
A
mV/°C
Document Number 74813
29-Nov-01
www.vishay.com
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