Voltage Regulators. MC7809CT Datasheet

MC7809CT Regulators. Datasheet pdf. Equivalent

Part MC7809CT
Description (MC78xxCT) 3-Terminal Fixed Positive Voltage Regulators
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Datasheet
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MC7809CT
( 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
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MC7809CT
MC78xxCT Series
Vishay Semiconductor
Maximum Ratings Ratings at 25°C ambient temperature unless otherwise specified.
Parameter
Symbol
Input Voltage(1)
Input Voltage(2)
Thermal Resistance(3)
Vin
Vin
RθJC
Operating Junction Temperature Range
TJ
Storage Junction Temperature Range
Tstg
Notes: (1) MC7805 to MC7818
(2) MC7824
(3) Follow the derating curve (fig. 1)
Value
30
40
5
20 to +150
65 to +150
Unit
V
V
°C/W
°C
°C
Electrical Characteristics – MC7805
Vin = 10V, 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
4.90
Vout
7V Vin 20V,
5mA Iout 1.0A, PD 15W
4.85
Line Regulation
(TJ = 25°C)
REGline
7V Vin < 25V
8V Vin < 13V
Load Regulation
(TJ = 25°C)
REGload
10mA Iout < 1.5A
250mA Iout < 750mA
Quiescent Current
Iq
Iout = 0, TJ = 25°C
Quiescent Current Change
7V Vin 25V
Iq
5mA Iout 1.0A
Output Noise Voltage
Vn 10Hz f 100KHz,TJ= 25°C
Ripple Rejection Ratio
RR
f = 120Hz
62
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.
5
3
1
15
5
4.2
40
78
2
17
750
1.5
1.1
Max.
5.10
5.15
Unit
V
100
mV
50
100
mV
50
8 mA
1.3
mA
0.5
µV
dB
V
m
mA
A
mV/°C
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Document Number 74813
29-Nov-01





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