KA78M05 / LM78M05 / MC78M05 — 3-Terminal 0.5 A Positive Voltage Regulator
January 2015
KA78M05 / LM78M05 / MC78M05
3-Terminal 0.5 A Positive Voltage Regulator
Features
•
•
•
•
•
Output Current up to 0.5 A
Output Voltages of 5 V
Thermal Overload Protection
Short-Circuit Protection
Output Transistor Safe Operating Area (SOA) Protection
Description
The KA78M05 / LM78M05 / MC78M05 series of three-
terminal positive regulators is available in the TO-220 / D-
PAK packages, making it useful in a wide range of appli-
cations.
TO-220
GND
1
D-PAK
GND
1
1. Input 2. GND 3. Output
Ordering Information
(1)
Product Number
KA78M05TU
KA78M05RTM
MC78M05CDTX
LM78M05CT
Package
TO-220 (Dual Gauge)
D-PAK
TO-220 (Single Gauge)
Packing Method
Rail
Tape and Reel
Rail
Operating Temperature
-40 to +125°C
Note:
1. Refer to below figure for TM / TF suffix of DPAK packing option.
© 2001 Fairchild Semiconductor Corporation
KA78M05 / LM78M05 / MC78M05 Rev. 2.5
www.fairchildsemi.com
KA78M05 / LM78M05 / MC78M05 — 3-Terminal 0.5 A Positive Voltage Regulator
Block Diagram
INPUT
1
SERIES
PASS
ELEMENT
OUTPUT
3
CURRENT
GENERATOR
SOA
PROTECTION
R1
STARTING
CIRCUIT
REFERENCE
VOLTAGE
ERROR
AMPLIFIER
R2
THERMAL
PROTECTION
GND
2
Figure 1. Block Diagram
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-
ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi-
tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only.
Symbol
V
I
R
θJC
R
θJA
T
OPR
T
J(MAX)
T
STG
Parameter
Input Voltage (for V
O
= 5 V)
Thermal Resistance, Junction-Case
(2)
Thermal Resistance, Junction-Air
(2), (3)
Operating Junction Temperature Range
Maximum Junction Temperature Range
Storage Temperature Range
TO-220 (T
C
= +25°C)
TO-220 (T
A
= +25°C)
D-PAK (T
A
= +25°C)
Value
35
2.5
66
92
-40 to +125
150
-65 to +150
Unit
V
°C/W
°C/W
°C
°C
°C
Notes:
2. Thermal resistance test board.
Size: 76.2 mm x 114.3 mm x 1.6 mm (1S0P)
JEDEC standard: JESD51-3, JESD51-7
3. Assume no ambient airflow.
© 2001 Fairchild Semiconductor Corporation
KA78M05 / LM78M05 / MC78M05 Rev. 2.5
www.fairchildsemi.com
2
KA78M05 / LM78M05 / MC78M05 — 3-Terminal 0.5 A Positive Voltage Regulator
Electrical Characteristics
Refer to the test circuits, -40 < T
J
< +125°C, I
O
= 350 mA, V
I
= 10 V, C
I
= 0.33
μF,
C
O
= 0.1
μF
unless otherwise speci-
fied.
(4)
Symbol
V
O
Parameter
Output Voltage
Conditions
T
J
= +25°C
I
O
= 5 mA to 350 mA,
V
I
= 7 V to 20 V
I
O
= 200 mA
T
J
= +25°C
V
I
= 7 V to 25 V
V
I
= 8 V to 25 V
Min.
4.8
4.75
Typ.
5.0
5.00
Max.
5.2
5.25
100
50
100
50
Unit
V
ΔV
O
ΔV
O
I
Q
ΔI
Q
ΔV/ΔT
V
N
RR
V
D
I
SC
I
PK
Line Regulation
(5)
Load Regulation
(5)
Quiescent Current
Quiescent Current Change
mV
mV
mA
mA
I
O
= 5 mA to 0.5 A, T
J
= +25°C
I
O
= 5 mA to 200 mA, T
J
= +25
°C
T
J
= +25°C
I
O
= 5 mA to 350 mA
I
O
= 200 mA,
V
I
= 8 V to 25 V
I
O
= 5 mA
T
J
= -40 to +125°C
f = 10 Hz to 100 kHz
f = 120 Hz, I
O
= 300 mA
V
I
= 8 V to 18 V, T
J
= +25
°C
T
J
= +25°C, I
O
= 500 mA
T
J
= +25°C, V
I
= 35 V
T
J
= +25°C
-0.5
40
80
2
300
700
4.0
6.0
0.5
0.8
Output Voltage Drift
Output Noise Voltage
Ripple Rejection
Dropout Voltage
Short-Circuit Current
Peak Current
mV/°C
μV/Vo
dB
V
mA
mA
Notes:
4. The parameters are guaranteed across the temperature range by characterization.
5. 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.
© 2001 Fairchild Semiconductor Corporation
KA78M05 / LM78M05 / MC78M05 Rev. 2.5
www.fairchildsemi.com
3
KA78M05 / LM78M05 / MC78M05 — 3-Terminal 0.5 A Positive Voltage Regulator
Typical Applications
(6), (7)
V
I
C
I
1
KA78M05
LM78M05
MC78M05
2
3
V
O
0.1
μF
0.3
μF
C
O
Figure 2. Fixed-Output Regulator
V
I
C
I
1
KA78M05
LM78M05
MC78M05
2
3
0.33
μF
C
O
0.1
μF
I
O
V
XX
I
O
R
1
Vxx
I
O
= R +I
O
1
Figure 3. Constant-Current Regulator
Notes:
6. C
I
is required if the regulator is located an appreciable distance from the power supply filter.
7. Although no output capacitor is needed for stability, it does improve transient response.
© 2001 Fairchild Semiconductor Corporation
KA78M05 / LM78M05 / MC78M05 Rev. 2.5
www.fairchildsemi.com
4
KA78M05 / LM78M05 / MC78M05 — 3-Terminal 0.5 A Positive Voltage Regulator
Typical Applications
(Continued)
1
V
I
C
I
KA78M05
LM78M05
MC78M05
2
3
V
O
V
XX
R
1
0.33
μF
C
O
0.1
μF
I
O
I
R1
≥
5I
O
V
O
= V
XX
(1+R
2
/R
1
) +I
O
R
2
R
2
Figure 4. Circuit for Increasing Output Voltage
V
I
C
I
1
KA78M05
LM78M05
MC78M05
2
3
V
O
C
O
7
2
3
4
0.1
μF
0.33
μF
6
LM741
10 kΩ
Figure 5. Adjustable Output Regulator (7 to 30 V)
13 V < V
I
< 25 V
V
I
C1
1
KA78M05
LM78M05
MC78M05
2
3
V
O
V
XX
R4
910
Ω
R5
9.1 kΩ
6
7
_
2
0.33
μF
C2
0.1μF
10 kΩ
-7 V < -V
I
< 17 V
LM741
+
3
R3
R1
4
V
O
= V
XX
R
4
R
1
Figure 6. 0.5 to 10 V Regulator
© 2001 Fairchild Semiconductor Corporation
KA78M05 / LM78M05 / MC78M05 Rev. 2.5
www.fairchildsemi.com
5