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KA78M05 / LM78M05 / MC78M05
3-Terminal 0.5 A Positive Voltage Regulator
Features
Description
•
•
•
•
•
The KA78M05 / LM78M05 / MC78M05 series of threeterminal positive regulators is available in the TO-220 / DPAK packages, making it useful in a wide range of applications.
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
TO-220
GND
1
D-PAK
GND
1
1. Input 2. GND 3. Output
Ordering Information(1)
Product Number
Package
Packing Method
KA78M05TU
TO-220 (Dual Gauge)
Rail
D-PAK
Tape and Reel
TO-220 (Single Gauge)
Rail
KA78M05RTM
MC78M05CDTX
LM78M05CT
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
January 2015
INPUT
OUTPUT
SERIES
PASS
ELEMENT
1
SOA
PROTECTION
CURRENT
GENERATOR
STARTING
CIRCUIT
3
REFERENCE
VOLTAGE
R1
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 operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only.
Symbol
VI
RθJC
Parameter
Value
Unit
35
V
TO-220 (TC = +25°C)
2.5
°C/W
TO-220 (TA = +25°C)
66
D-PAK (TA = +25°C)
92
Input Voltage (for VO = 5 V)
(2)
Thermal Resistance, Junction-Case
RθJA
Thermal Resistance, Junction-Air(2), (3)
TOPR
Operating Junction Temperature Range
-40 to +125
°C
TJ(MAX)
Maximum Junction Temperature Range
150
°C
-65 to +150
°C
TSTG
Storage Temperature Range
°C/W
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
Block Diagram
Refer to the test circuits, -40 < TJ < +125°C, IO = 350 mA, VI = 10 V, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified.(4)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
TJ = +25°C
4.8
5.0
5.2
Output Voltage
IO = 5 mA to 350 mA,
VI = 7 V to 20 V
4.75
5.00
5.25
ΔVO
Line Regulation(5)
IO = 200 mA
TJ = +25°C
ΔVO
Load Regulation(5)
IQ
Quiescent Current
VO
ΔIQ
Quiescent Current Change
VI = 7 V to 25 V
100
VI = 8 V to 25 V
50
IO = 5 mA to 0.5 A, TJ = +25°C
100
IO = 5 mA to 200 mA, TJ = +25 °C
50
TJ = +25°C
4.0
0.5
IO = 200 mA,
VI = 8 V to 25 V
0.8
Output Voltage Drift
IO = 5 mA
TJ = -40 to +125°C
VN
Output Noise Voltage
RR
ΔV/ΔT
6.0
IO = 5 mA to 350 mA
Unit
V
mV
mV
mA
mA
-0.5
mV/°C
f = 10 Hz to 100 kHz
40
μV/Vo
Ripple Rejection
f = 120 Hz, IO = 300 mA
VI = 8 V to 18 V, TJ = +25 °C
80
dB
VD
Dropout Voltage
TJ = +25°C, IO = 500 mA
2
V
ISC
Short-Circuit Current
TJ = +25°C, VI = 35 V
300
mA
IPK
Peak Current
TJ = +25°C
700
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 Vo 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
Electrical Characteristics
KA78M05 / LM78M05 / MC78M05 — 3-Terminal 0.5 A Positive Voltage Regulator
Typical Applications(6), (7)
KA78M05
LM78M05
MC78M05
1
VI
VO
CO
2
CI
3
0.3 μF
0.1 μF
Figure 2. Fixed-Output Regulator
1
VI
CI
KA78M05
LM78M05
MC78M05
2
0.33 μF
IO
3
CO
0.1 μF
VXX
IO
R1
Vxx
IO = R +IO
1
Figure 3. Constant-Current Regulator
Notes:
6. CI 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)
KA78M05
LM78M05
MC78M05
1
VI
3
0.33 μF
VXX
CO
2
CI
VO
0.1 μF
IO
R1
IR1 ≥ 5IO
VO = VXX (1+R2/R1) +IOR2
R2
Figure 4. Circuit for Increasing Output Voltage
1
VI
CI
KA78M05
LM78M05
MC78M05
3
VO
2
CO
0.33 μF
2
7
6
0.1 μF
LM741
3
10 kΩ
4
Figure 5. Adjustable Output Regulator (7 to 30 V)
13 V < VI < 25 V
1
VI
C1
0.33 μF
KA78M05
LM78M05
MC78M05
2
3
VO
VXX
R4
910 Ω
R5
9.1 kΩ
6
-7 V < -VI < 17 V
C2
7 _ 2
LM741
+ 3 R3
R1
4
0.1μF
10 kΩ
VO = VXX
R4
R1
Figure 6. 0.5 to 10 V Regulator
© 2001 Fairchild Semiconductor Corporation
KA78M05 / LM78M05 / MC78M05 Rev. 2.5
www.fairchildsemi.com
5
KA78M05 / LM78M05 / MC78M05 — 3-Terminal 0.5 A Positive Voltage Regulator
Physical Dimensions
Figure 7. TO-220, MOLDED, 3LEAD, JEDEC VARIATION AB
© 2001 Fairchild Semiconductor Corporation
KA78M05 / LM78M05 / MC78M05 Rev. 2.5
www.fairchildsemi.com
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