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MC7808CT 데이터시트 PDF




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부품번호 MC7808CT 기능
기능 (MC78xxCT) 3-Terminal Fixed Positive Voltage Regulators
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MC7808CT 데이터시트, 핀배열, 회로
( DataSheet : www.DataSheet4U.com )
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




MC7808CT pdf, 반도체, 판매, 대치품
MC78xxCT Series
Vishay Semiconductor
Electrical Characteristics – MC7809
Vin = 15V, 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
8.82
Vout
11.5V Vin 24V,
5mA Iout 1.0A, PD 15W
8.77
Line Regulation
(TJ = 25°C)
REGline
11.5V Vin < 27V
12V Vin < 16V
Load Regulation
(TJ = 25°C)
REGload
5mA Iout < 1.5A
250mA Iout < 750mA
Quiescent Current
Iq
Iout = 0, TJ = 25°C
Quiescent Current Change
11.5V Vin 27V
Iq
5mA Iout 1.0A
Output Noise Voltage
Vn 10Hz f 100KHz,TJ= 25°C
Ripple Rejection Ratio
RR f = 120Hz,12V Vin 22V 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.
9
6
2
12
4
4.3
52
72
2
16
450
1.5
1
Max.
9.18
9.23
Unit
V
160
mV
80
160
mV
80
8 mA
1
mA
0.5
µV
dB
V
m
mA
A
mV/°C
Electrical Characteristics – MC7810
Vin = 16V, 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
9.8
Vout
12.5V Vin 25V,
5mA Iout 1.0A, PD 15W
9.75
Line Regulation
(TJ = 25°C)
REGline
12.5V Vin < 28V
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
12.5V Vin 28V
Iq
5mA Iout 1.0A
Output Noise Voltage
Vn 10Hz f 100KHz,TJ= 25°C
Ripple Rejection Ratio
RR f = 120Hz, 13V Vin 23V 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.
10
10
3
12
4
4.3
52
72
2
16
450
1.5
1
Max.
10.2
10.25
Unit
V
240
mV
120
240
mV
120
8 mA
1
mA
0.5
µV
dB
V
m
mA
A
mV/°C
www.vishay.com
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Document Number 74813
29-Nov-01

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MC7808CT 전자부품, 판매, 대치품
MC78xxCT Series
Vishay Semiconductor
Ratings and
Characteristic Curves (TA = 25°C unless otherwise noted)
Fig. 1 Power Dissipation vs.
Ambient Temperature (MC78xxCT)
20
θJC = 5°C/W
θJA = 65°C/W
16 TJ (max) = 150°C
θHS = 5°C/W
12
8.0
θHS = 15°C/W
4.0 No Heatsink
Fig. 2 Dropout Voltage
vs. Junction Temperature
2.5
Io = 1.0A
2.0
Io = 500mA
1.5
Io = 200mA
Io = 20mA
1.0
Io = 0mA
0
0 25 50 75 100 125 150
Ambient Temperatue (°C)
Fig. 3 Peak Output Current
3.00
2.25 TJ = --40°C
1.50
TJ = 0°C
TJ = 25°C
TJ = 125°C
0.75
0
0
1000
6.0 12
18 24
Input -- Output Voltage Differential (V)
30
Fig. 5 Output Impedance (m)
vs. Output Voltage
f = 120Hz
Io = 500mA
CL = OuF
0.5
0
25 50 75 100 125
Fig. 4 Ripple Rejection Ratio
vs. Output Voltage
80
f = 120Hz
Io = 20mA
˘Vin = 1.0V (RMS)
70
60
Part # / Vin
7805 / 10V
7806 / 11V
50 7808 / 14V
7812 / 19V
7815 / 23V
7818 / 27V
7824 / 33V
40
4.0 6.0 8.0 10 12 14 16 18 20 22 24
Vo -- Output Voltage (V)
Fig. 6 Output Voltage
vs. Junction Temperature
6.20
Vin = 10V
Vo = 6.0V
Io = 20mA
6.10
100 6.00
5.90
10
4.0
8.0 12 16 20
Vo -- Output Voltage (V)
Document Number 74813
29-Nov-01
24
5.80
--75 --50 --25 0 25 50 100 125 150 175 200
TJ -- Junction Temperature (°C)
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