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www.fairchildsemi.com
MC78MXX/LM78MXX
3-Terminal 0.5A Positive Voltage Regulator
Features
•
•
•
•
•
Output Current up to 0.5A
Output Voltages of 5, 6, 8, 12, 15, 18, 24V
Thermal Overload Protection
Short Circuit Protection
Output Transistor Safe Operating Area (SOA)Protection
Description
The MC78MXX/LM78MXX series of three-terminal
positive regulators are available in the TO-220/D-PAK
package with several fixed output voltages making it useful
in a wide range of applications.
TO-220
GND
1
D-PAK
GND
1
1. Input 2. GND 3. Output
Internal Block Digram
INPUT
1
SERIES
PASS
ELEMENT
OUTPUT
3
CURRENT
GENERATOR
SOA
PROTECTION
R1
STARTING
CIRCUIT
REFERENCE
VOLTAGE
ERROR
AMPLIFIER
R2
THERMAL
PROTECTION
GND
2
Rev. 1.0.6
©2009 Fairchild Semiconductor Corporation
MC78MXX/LM78MXX
Absolute Maximum Ratings
Parameter
Input Voltage (for V
O
= 5V to 18V)
(for V
O
= 24V)
Thermal Resistance Junction-Case (Note1)
TO-220 (Tc = +25°C)
Thermal Resistance Junction-Air (Note1, 2)
TO-220 (Ta = +25°C)
D-PAK (Ta = +25°C)
Operating Junction Temperature Range
Storage Temperature Range
Note:
1. Thermal resistance test board
Size: 76.2mm * 114.3mm * 1.6mm(1S0P)
JEDEC standard: JESD51-3, JESD51-7
2. Assume no ambient airflow
Symbol
V
I
V
I
R
θJC
R
θJA
T
OPR
T
STG
Value
35
40
2.5
66
92
0 ~ +150
-65 ~ +150
Unit
V
V
°C/W
°C/W
°C
°C
Electrical Characteristics (MC78M05/LM78M05)
(Refer to the test circuits, 0
<
T
J
<
+125°C, I
O
=350mA, V
I
=10V, unless otherwise specified, C
I
= 0.33μF, C
O
=0.1μF)
Parameter
Output Voltage
Symbol
V
O
Conditions
T
J
= +25°C
I
O
= 5mA to 350mA
V
I
= 7V to 20V
I
O
= 200mA
T
J
=+25°C
V
I
= 7V to 25V
V
I
= 8V to 25V
Min.
4.8
4.75
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ.
5
5
-
-
-
-
4.0
-
-
-0.5
40
80
2
300
700
Max.
5.2
5.25
100
50
100
50
6.0
0.5
0.8
-
-
-
-
-
-
mA
V
Unit
Line Regulation (Note3)
Load Regulation (Note3)
Quiescent Current
Quiescent Current Change
ΔV
O
ΔV
O
I
Q
ΔI
Q
ΔV/ΔT
V
N
RR
V
D
I
SC
I
PK
mV
mV
mA
I
O
= 5mA to 0.5A, T
J
=+25°C
I
O
= 5mA to 200mA, T
J
=+25
°C
T
J
=+25°C
I
O
= 5mA to 350mA
I
O
= 200mA
V
I
= 8V to 25V
I
O
= 5mA
T
J
= 0 to +125°C
f = 10Hz to 100kHz
f = 120Hz, I
O
= 300mA
V
I
= 8V to 18V, T
J
=+25
°C
T
J
=+25°C, I
O
= 500mA
T
J
=+25°C, V
I
= 35V
T
J
=+25°C
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Short Circuit Current
Peak Current
mV/°C
μ
V/Vo
dB
V
mA
mA
Note:
3. Load and line regulation are specified at constant junction temperature. Change in V
o
due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
2
MC78MXX/LM78MXX
Electrical Characteristics (MC78M06)
(Continued)
(Refer to the test circuits, 0
<
T
J
<
+125°C, I
O
=350mA, V
I
=11V, unless otherwise specified, C
I
=0.33μF, C
O
=0.1μF)
Parameter
Output Voltage
Symbol
V
O
Conditions
T
J
= +25°C
I
O
= 5mA to 350mA
V
I
= 8V to 21V
I
O
= 200mA
T
J
= +25°C
V
I
= 8V to 25V
V
I
= 9V to 25V
Min.
5.75
5.7
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ.
6
6
-
-
-
-
4.0
-
-
-0.5
45
80
2
300
700
Max.
6.25
6.3
100
50
120
60
6.0
0.5
0.8
-
-
-
-
-
-
mA
V
Unit
Line Regulation (Note1)
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
ΔV
O
ΔV
O
I
Q
ΔI
Q
ΔV/ΔT
V
N
RR
V
D
I
SC
I
PK
mV
mV
mA
I
O
= 5mA to 0.5A, T
J
= +25°C
I
O
= 5mA to 200mA, T
J
= +25°C
T
J
= +25°C
I
O
= 5mA to 350mA
I
O
= 200mA
V
I
= 9V to 25V
I
O
= 5mA
T
J
= 0 to +125°C
f = 10Hz to 100kHz
f = 120Hz, I
O
= 300mA
V
I
= 9V to 19V, T
J
=+25
°C
T
J
=+25°C, I
O
= 500mA
T
J
= +25°C, V
I
= 35V
T
J
=+25°C
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Short Circuit Current
Peak Current
mV/°C
μ
V/Vo
dB
V
mA
mA
Note:
1. Load and line regulation are specified at constant junction temperature. Change in V
o
due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
3
MC78MXX/LM78MXX
Electrical Characteristics (MC78M08)
(Continued)
(Refer to the test circuits, 0
<
T
J
<
+125°C, I
O
=350mA, V
I
=14V, unless otherwise specified, C
I
= 0.33μF, C
O
=0.1μF)
Parameter
Output Voltage
Symbol
T
J
=+25°C
V
O
I
O
= 5mA to 350mA
V
I
= 10.5V to 23V
I
O
= 200mA
T
J
=+25°C
V
I
= 10.5V to 25V
V
I
= 11V to 25V
Conditions
Min.
7.7
7.6
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ.
8
8
-
-
-
-
4.0
-
-
−0.5
52
80
2
300
700
Max.
8.3
8.4
100
50
160
80
6.0
0.5
0.8
-
-
-
-
-
-
mA
V
Unit
Line Regulation (Note1)
Load Regulation (Note1)
Quiescent Current
Quiescent Current Change
ΔV
O
ΔV
O
I
Q
ΔI
Q
mV
mV
mA
I
O
= 5mA to 0.5A, T
J
=+25°C
I
O
= 5mA to 200mA, T
J
=+25°C
T
J
= +25°C
I
O
= 5mA to 350mA
I
O
= 200mA
V
I
= 10.5V to 25V
I
O
= 5mA
T
J
= 0 to +125°C
f = 10Hz to 100kHz
f = 120Hz, I
O
= 300mA
V
I
= 11.5V to 21.5V, T
J
=+25
°C
T
J
= +25°C, I
O
= 500mA
T
J
= +25°C, V
I
= 35V
T
J
= +25°C
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Short Circuit Current
Peak Current
RR
V
N
RR
V
D
I
SC
I
PK
mV/°C
μ
V/Vo
dB
V
mA
mA
Note:
1. Load and line regulation are specified at constant junction temperature. Change in V
O
due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
4
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