Lm7805
MC78XX/LM78XX/MC78XXA
3-Terminal 1A Positive Voltage Regulator
Features
Description
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The MC78XX/LM78XX/MC78XXA 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,
thermalshut 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.
Output Current up to 1A
Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24VThermal Overload Protection
Short Circuit Protection
Output Transistor Safe Operating Area Protection
TO-220
1
D-PAK
1
1. Input 2. GND 3. Output
Internal Block Digram
Rev. 1.0.1
©2001 Fairchild Semiconductor Corporation
MC78XX/LM78XX/MC78XXA
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
VI
VI
35
40
V
V
RθJC
5
Input Voltage (for VO =5V to 18V)
(for VO = 24V)
Thermal Resistance Junction-Cases (TO-220)
o
C/W
oC/W
Thermal Resistance Junction-Air (TO-220)
RθJA
65
Operating Temperature Range
TOPR
0 ~ +125
o
-65 ~ +150
o
Storage Temperature Range
TSTG
C
C
Electrical Characteristics (MC7805/LM7805)
(Refer to test circuit ,0°C < TJ < 125°C, IO = 500mA, VI = 10V, CI= 0.33µF, CO=0.1µF, unless otherwise specified)
Parameter
Symbol
Conditions
MC7805/LM7805
VO
Typ.
Max.
TJ =+25 oC
Output Voltage
Min.
4.8
5.0
5.2
5.0mA ≤ Io ≤ 1.0A, PO ≤ 15W
VI = 7V to 20V
4.75
5.0
5.25
Unit
VO = 7V to 25V
-
4.0
100
VI = 8V to 12V
-
1.6
50
IO = 5.0mA to1.5A
-
9
100
IO =250mA to
750mA
-
4
50
VLine Regulation (Note1)
Regline
TJ=+25 oC
Load Regulation (Note1)
Regload
TJ=+25 oC
IQ
TJ =+25 oC
-
5.0
8.0
IO = 5mA to 1.0A
-
0.03
0.5
VI= 7V to 25V
-
0.3
1.3
IO= 5mA
-
-0.8
-
mV/ oC
-
42
-
µV/Vo
62
73
-
dB
IO = 1A, TJ =+25 oC
-
2
-
V
f = 1KHz
-
15
-
mΩ
-
230
-
mA-
2.2
-
A
Quiescent Current
Quiescent Current Change
Output Voltage Drift
∆ IQ
∆VO/∆T
Output Noise Voltage
VN
f = 10Hz to 100KHz, TA=+25 oC
Ripple Rejection
RR
f = 120Hz
VO = 8V to 18V
Dropout Voltage
VDrop
Output Resistance
Short Circuit Current
Peak Current
rO
ISC
VI = 35V, TA =+25
IPK
o
TJ =+25 C
oC
mV
mV
mA
mA
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
MC78XX/LM78XX/MC78XXA
Electrical Characteristics (MC7806)
(Refer to test circuit ,0°C < TJ < 125°C, IO = 500mA, VI =11V, CI= 0.33µF, CO= 0.1µF, unless otherwise specified)
Parameter
SymbolConditions
MC7806
VO
Typ.
Max.
TJ =+25 oC
Output Voltage
Min.
5.75
6.0
6.25
5.0mA ≤ IO ≤ 1.0A, PO ≤ 15W
VI = 8.0V to 21V
5.7
6.0
6.3
VI = 8V to 25V
-
5
120
VI = 9V to 13V
-
1.5
60
IO =5mA to 1.5A
-
9
120
IO =250mA to750A
-
3
60
Unit
V
Line Regulation (Note1)
Regline
TJ =+25 oC
Load Regulation(Note1)
Regload
TJ =+25 oC
IQ
TJ =+25 oC
-
5.0
8.0
IO = 5mA to 1A
-
-
0.5
VI = 8V to 25V
-
-
1.3
IO = 5mA
-
-0.8
-
mV/ oC
VN
f = 10Hz to 100KHz, TA =+25 oC
-
45
-
µV/Vo
Ripple Rejection
RR
f = 120Hz
VI = 9V to 19V
59
75
-
dB
Dropout Voltage
VDrop
IO = 1A, TJ =+25 oC
-
2
-
V...
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