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Fairchild Semiconductor Electronic Components Datasheet

7812 Datasheet

3-Terminal 1A Positive Voltage Regulator

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www.fairchildsemi.com
KA78XX/KA78XXA
3-Terminal 1A Positive Voltage Regulator
Features
• Output Current up to 1A
• Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24V
• Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area Protection
Description
The KA78XX/KA78XXA series of three-terminal positive
regulator 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
Internal Block Digram
1
D-PAK
1
1. Input 2. GND 3. Output
©2001 Fairchild Semiconductor Corporation
Rev. 1.0.0


Fairchild Semiconductor Electronic Components Datasheet

7812 Datasheet

3-Terminal 1A Positive Voltage Regulator

No Preview Available !

KA78XX/KA78XXA
Absolute Maximum Ratings
Parameter
Input Voltage (for VO = 5V to 18V)
(for VO = 24V)
Thermal Resistance Junction-Cases (TO-220)
Thermal Resistance Junction-Air (TO-220)
Operating Temperature Range (KA78XX/A/R)
Storage Temperature Range
Symbol
VI
VI
RθJC
RθJA
TOPR
TSTG
Value
35
40
5
65
0 ~ +125
-65 ~ +150
Unit
V
V
°C/W
°C/W
°C
°C
Electrical Characteristics (KA7805/KA7805R)
(Refer to test circuit ,0°C < TJ < 125°C, IO = 500mA, VI =10V, CI= 0.33µF, CO=0.1µF, unless otherwise specified)
Parameter
Output Voltage
Line Regulation (Note1)
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Output Resistance
Short Circuit Current
Peak Current
Symbol
VO
Regline
Regload
IQ
IQ
VO/T
VN
RR
VDrop
rO
ISC
IPK
Conditions
TJ =+25 oC
5.0mA Io 1.0A, PO 15W
VI = 7V to 20V
TJ=+25 oC
VO = 7V to 25V
VI = 8V to 12V
TJ=+25 oC
TJ =+25 oC
IO = 5.0mA to1.5A
IO =250mA to 750mA
IO = 5mA to 1.0A
VI= 7V to 25V
IO= 5mA
f = 10Hz to 100KHz, TA=+25 oC
f = 120Hz
VO = 8V to 18V
IO = 1A, TJ =+25 oC
f = 1KHz
VI = 35V, TA =+25 oC
TJ =+25 oC
KA7805
Min. Typ. Max.
4.8 5.0 5.2
4.75 5.0 5.25
- 4.0 100
- 1.6 50
- 9 100
- 4 50
- 5.0 8.0
- 0.03 0.5
- 0.3 1.3
- -0.8 -
- 42 -
62 73 -
- 2-
- 15 -
- 230 -
- 2.2 -
Unit
V
mV
mV
mA
mA
mV/ oC
µV/VO
dB
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


Part Number 7812
Description 3-Terminal 1A Positive Voltage Regulator
Maker Fairchild Semiconductor
Total Page 28 Pages
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