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MC7808AE Schematic ( PDF Datasheet ) - Fairchild Semiconductor

Teilenummer MC7808AE
Beschreibung 3-Terminal 1A Positive Voltage Regulator
Hersteller Fairchild Semiconductor
Logo Fairchild Semiconductor Logo 




Gesamt 26 Seiten
MC7808AE Datasheet, Funktion
www.fairchildsemi.com
MC78XXE/LM78XXE/MC78XXAE
3-Terminal 1A Positive Voltage Regulator
Features
• Output Current up to 1A
• Output Voltages of 5, 6, 8, 9, 12, 15, 18, 24V
• Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area Protection
Description
The MC78XXE/LM78XXE/MC78XXAE series of three
terminal positive regulators are available in the
TO-220/D-PAK package and with several fixed output
voltages, making them useful in a wide range of
applications. Each type employs internal current limiting,
thermal shut down and safe operating area protection,
making it essentially indestructible. If adequate heat sinking
is provided, they can deliver over 1A output current.
Although designed primarily as fixed voltage regulators,
these devices can be used with external components to
obtain adjustable voltages and currents.
TO-220
GND
Internal Block Digram
1
D-PAK
GND
1
1. Input 2. GND 3. Output
INPUT
1
CURRENT
GENERATOR
STARTING
CIRCUIT
REFERENCE
VOLTAGE
SERIES
PASS
ELEMENT
SOA
PROTECTION
ERROR
AMPLIFIER
OUTPUT
3
©2003 Fairchild Semiconductor Corporation
THERMAL
PROTECTION
GND
2
Rev. 1.0.0






MC7808AE Datasheet, Funktion
MC78XXE/LM78XXE/MC78XXAE
Electrical Characteristics (MC7812E) (Continued)
(Refer to test circuit ,0°C < TJ < 125°C, IO = 500mA, VI =19V, CI= 0.33µF, CO=0.1µF, unless otherwise specified)
Parameter
Symbol
Conditions
Output Voltage
Line Regulation (Note1)
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
Output Voltage Drift (Note2)
Output Noise Voltage
Ripple Rejection (Note2)
Dropout Voltage
Output Resistance (Note2)
Short Circuit Current
Peak Current (Note2)
VO
Regline
Regload
IQ
IQ
VO/T
VN
RR
VDrop
rO
ISC
IPK
TJ = +25°C
5.0mA IO 1.0A, PO 15W
VI = 14.5V to 27V
TJ = +25°C
VI = 14.5V to 30V
VI = 16V to 22V
TJ = +25°C
IO = 5mA to 1.5A
IO = 250mA to 750mA
TJ = +25°C
IO = 5mA to 1.0A
VI = 14.5V to 30V
IO = 5mA
f = 10Hz to 100kHz, TA = +25°C
f = 120Hz
VI = 15V to 25V
IO = 1A, TJ = +25°C
f = 1kHz
VI = 35V, TA= +25°C
TJ = +25°C
MC7812E
Min. Typ. Max.
11.5 12 12.5
11.4 12 12.6
Unit
V
- 10 240
mV
- 3.0 120
- 11 240
mV
- 5.0 120
- 5.1 8.0 mA
- 0.1 0.5
mA
- 0.5 1.0
- -1 - mV/°C
- 76 - µV/Vo
55 71 -
dB
- 2-
- 18 -
- 230 -
- 2.2 -
V
m
mA
A
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
2. These parameters, although guaranteed, are not 100% tested in production.
6

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MC7808AE pdf, datenblatt
MC78XXE/LM78XXE/MC78XXAE
Electrical Characteristics (MC7808AE) (Continued)
(Refer to the test circuits. 0°C < TJ < 125°C, Io =1A, V I = 14V, C I=0.33µF, C O=0.1µF, unless otherwise specified)
Parameter
Output Voltage
Line Regulation (Note1)
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
Output Voltage Drift (Note2)
Output Noise Voltage
Ripple Rejection (Note2)
Dropout Voltage
Output Resistance (Note2)
Short Circuit Current
Peak Current (Note2)
Symbol
VO
Regline
Regload
IQ
IQ
V/T
VN
RR
VDrop
rO
ISC
IPK
Conditions
TJ =+25°C
IO = 5mA to 1A, PO 15W
VI = 10.6V to 23V
VI= 10.6V to 25V, IO = 500mA
VI= 11V to 17V
TJ =+25°C
VI= 10.4V to 23V
VI= 11V to 17V
TJ =+25°C, IO = 5mA to 1.5A
IO = 5mA to 1A
IO = 250mA to 750mA
TJ =+25°C
IO = 5mA to 1A
VI = 11V to 25V, IO = 500mA
VI= 10.6V to 23V, TJ =+25°C
IO = 5mA
f = 10Hz to 100kHz
TA =+25°C
f = 120Hz, IO = 500mA
VI = 11.5V to 21.5V
IO = 1A, TJ =+25°C
f = 1kHz
VI = 35V, TA =+25°C
TJ = +25°C
Min. Typ. Max.
7.84 8 8.16
7.7 8 8.3
Unit
V
- 6 80
- 3 80
mV
- 6 80
- 2 40
- 12 100
- 12 100 mV
- 5 50
- 5.0 6
mA
- - 0.5
- - 0.8 mA
- - 0.8
- -0.8 - mV/°C
- 10 - µV/Vo
- 62 -
-2 -
- 18 -
- 250 -
- 2.2 -
dB
V
m
mA
A
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.
2. These parameters, although guaranteed, are not 100% tested in production.
12

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