KA78R12CTU [FAIRCHILD]
1A Output Low Dropout Voltage Regulators; 1A输出低压差稳压器
| 型号： | KA78R12CTU |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | 1A Output Low Dropout Voltage Regulators |
| 文件： | 总20页 (文件大小：191K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
KA78RXXC-Series
1A Output Low Dropout Voltage Regulators
Features
Description
• 1A/3.3V, 5V, 8V, 9V, 12V, 15V output low dropout
voltage regulator
The KA78RXXC is a low-dropout voltage regulator suitable
for various electronic equipments.
• TO-220 full-mold package (4pin)
• Overcurrent protection, thermal shutdown
• Overvoltage protection, short circuit protection
• With output disable function
It provides constant voltage power source with TO-220-4
lead full mold package. Dropout voltage of KA78RXXC is
below 0.5V in full rated current(1A).
This regulator has various functions such as peak current
protection, thermal shut down, overvoltage protection and
output disable function.
TO-220F-4L
1
1. Vin 2. V 3. GND 4. Vdis
O
Internal Block Diagram
Q1
2
Vin
1
Vo
OVERVOLTAGE
PROTECTION
THERMAL SHUTDOWN
BANDGAP REFERENCE
-
+
R1
SOA PROTECTION
HIGH / LOW
OUTPUT
ON / OFF
4
Vdis
-
+
R2
SHORT-CIRCUIT
PROTECTION
1.4V
3
GND
Rev. 1.0.0
©2003 Fairchild Semiconductor Corporation
KA78RXXC-SERIES
Absolute Maximum Ratings
KA78RXXC
Parameter
Symbol
Vin
Value
35
Unit
V
Remark
Input voltage
-
Disable voltage
Vdis
Io
35
V
-
Output current
1.0
A
-
Power dissipation 1
Pd1
Pd2
Tj
1.5
W
No heatsink
Power dissipation 2
Junction temperature
Operating temperature
Thermal resistance, junction-to case (Note2)
Thermal resistance, junction-to-air (Note2)
15
W
With heatsink
+150
-20 ~ +80
4.31
48.83
°C
-
-
-
-
Topr
Rθjc
Rθja
°C
°C/W
°C/W
2
KA78RXXC-SERIES
Electrical Characteristics
(Vin = Note3, Io = 0.5A, Ta = 25°C, unless otherwise specified)
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
KA78R33C
KA78R05C
KA78R08C
KA78R09C
KA78R12C
KA78R15C
-
-
-
-
-
-
3.22
3.3
5
3.38
5.12
8.2
9.22
12.3
15.4
2.0
2.5
-
4.88
7.8
8
Output voltage
Vo
V
8.78
9
11.7
12
15
0.1
0.5
55
-
14.6
Load regulation
Rload
Rline
RR
5mA < Io < 1A
-
%
%
Line regulation
Note4
-
45
-
Ripple rejection ratio
Dropout voltage
Note1
dB
V
Vdrop
VdisH
VdisL
IdisH
IdisL
Iq
Io = 1A
0.5
-
Disable voltage high
Disable voltage low
Disable bias current high
Disable bias current low
Quiescent current
Output active
Output disabled
Vdis = 2.7V
Vdis = 0.4V
Io = 0A
2.0
-
-
V
-
0.8
20
V
-
-
µA
mA
mA
-
-
-0.4
10
-
-
Note:
1.These parameters, although guaranteed, are not 100% tested in production.
2. Junction -to -case thermal resistance test environments.
-. Pneumatic heat sink fixture.
-. Clamping pressure 60psi through 12mm diameter cylinder.
-. Thermal grease applied between PKG and heat sink fixture.
3. KA78R33C :Vin = 5V
KA78R05C : Vin = 7V
KA78R08C : Vin = 10V
KA78R09C : Vin = 11V
KA78R12C : Vin = 15V
KA78R15C : Vin = 20V
4. KA78R33C :Vin = 4V to 10V
KA78R05C : Vin = 6V to 12V
KA78R08C : Vin = 9V to 25V
KA78R09C : Vin = 10V to 25V
KA78R12C : Vin = 13V to 29V
KA78R15C : Vin = 16V to 30V
3
KA78RXXC-SERIES
Typical Performance Characteristics
KA78R33
5.25
80
60
40
20
0
4.50
3.75
RL=
3.00
2.25
RL=3.3Ω
1.50
RL=
∞
0.75
0
0
5
10
Input voltage Vin(V)
15
20
0
2
4
6
8
10
Input voltage Vin (V)
Figure 1. Output Voltage vs. Input Voltage
Figure 2. Quiescent Current vs. Input Voltage
3.36
5.25
3.34
3.32
4.50
3.75
3.00
2.25
1.50
3.30
3.28
3.26
3.24
0.75
0
3.22
0
0.5
3
1
1.5
2
2.5
75
TEMPERATURE Tj(oC)
-25
0
25
50
100
125
Disable voltage Vdis (V)
Figure 3. Output Voltage vs. Disable Voltage
Figure 4. Output Voltage vs. Temperature(Tj)
10
8
0.55
0.50
0.45
0.40
6
4
2
0
1.0A
0.35
0.30
0.25
0.20
-25
0
25
50
75
100
125
75
-25
0
25
50
100
125
Junction Temp Tj [
℃
]
Junction temperature Tj(oC)
Figure 5. Quiescent Current vs. Temperature(Tj)
Figure 6. Dropout Voltage vs.Junction Temperature
4
KA78RXXC-SERIES
Typical Performance Characteristics (Continued)
20
15
100
80
60
10
5
40
20
0
0
-25
1.5
0
0.5
1.0
2.0
2.5
3.0
75
0
25
50
100
125
Output Current(A)
TEMPERATURE TJ
(oC)
Figure 7. Power Dissipation vs. Temperature(Tj)
Figure 8. Overcurrent Protection Characteristics
(Typical Value)
2.75
2.50
2.25
2.00
1.75
1.50
0
1
2
3
4
5
6
Input-output differential voltage Vin-Vo (V)
Figure 9. Output Peak Currenrt vs.
Input-Output Differential Voltage
5
KA78RXXC-SERIES
Typical Performance Characteristics
KA78R05C
7
6
80
60
40
20
0
5
RL=
4
3
RL=5Ω
2
RL=
∞
1
0
0
5
10
Input voltage Vin(V)
15
20
0
5
10
15
Input voltage Vin (V)
Figure 1. Output Voltage vs. Input Voltage
Figure 2. Quiescent Current vs. Input Voltage
7
6
5
4
3
5.06
5.04
5.02
5.00
4.98
2
1
0
4.96
4.94
4.92
0
0.5
3
1
1.5
2
2.5
75
TEMPERATURE Tj(oC )
-25
0
25
50
100
125
Disable voltage Vdis (V)
Figure 3. Output Voltage vs. Disable Voltage
Figure 4. Output Voltage vs. Temperature(Tj)
10
8
0.55
0.50
0.45
0.40
6
4
2
0
1.0A
0.35
0.30
0.25
0.20
-25
0
25
50
75
100
125
75
-25
0
25
50
100
125
Junction Temp Tj [
℃
]
Junction temperature Tj(oC)
Figure 5. Quiescent Current vs. Temperature(Tj)
Figure 6. Dropout Voltage vs. Junction Temperature
6
KA78RXXC-SERIES
Typical Performance Characteristics (Continued)
20
15
100
80
60
10
5
40
20
0
0
-25
1.5
0
0.5
1.0
2.0
2.5
3.0
75
0
25
50
100
125
Output Current(A)
o
j
TEMPERATURE TJ( C)
Figure 8. Overcurrent Protection Characteristics
(Typical Value)
Figure 7. Power Dissipation vs. Temperature(Tj)
2.75
2.50
2.25
2.00
1.75
1.50
0
1
2
3
4
5
6
Input-output differential voltage Vin-Vo (V)
Figure 9. Output Peak Currenrt vs.
Input-Output Differential Voltage
7
KA78RXXC-SERIES
Typical Performance Characteristics (Continued)
KA78R08C
10
9
80
60
40
20
0
RL=
8
7
6
5
RL=8Ω
4
3
2
1
0
RL=
∞
0
5
10
Input voltage Vin(V)
15
20
5
10
15
20
25
0
Input voltage Vin (V)
Figure 2. Quiescent Current vs. Input Voltage
Figure 1. Output Voltage vs. Input Voltage
10
9
8
7
6
5
4
3
2
1
0
8.06
8.04
8.02
8.00
7.98
7.96
7.94
7.92
0.5
3
1
1.5
2
2.5
75
TEMPERATURE Tj(oC)
-25
0
25
50
100
125
Disable voltage Vdis (V)
Figure 3. Output Voltage vs. Disable Voltage
Figure 4. Output Voltage vs. Temperature(Tj)
10
8
0.55
0.50
0.45
0.40
6
4
2
0
1.0A
0.35
0.30
0.25
0.20
-25
0
25
50
75
100
125
75
-25
0
25
50
100
125
Junction Temp Tj [
℃
]
Junction temperature Tj(oC )
Figure 6. Dropout Voltage vs.Junction Temperature
Figure 5. Quiescent Current vs. Temperature(Tj)
8
KA78RXXC-SERIES
Typical Performance Characteristics (Continued)
100
20
15
80
60
10
5
40
20
0
0
-25
1.5
0
0.5
1.0
2.0
2.5
75
0
25
50
100
125
Output Current(A)
TEMPERATURE TJ
(oC)
Figure 8. Overcurrent Protection Characteristics
(Typical Value)
Figure 7. Power Dissipation vs. Temperature(Tj)
2.75
2.50
2.25
2.00
1.75
1.50
0
1
2
3
4
5
6
Input-output differential voltage Vin-Vo (V)
Figure 9. Output Peak Currenrt vs.
Input-Output Differential Voltage
9
KA78RXXC-SERIES
Typical Performance Characteristics (Continued)
KA78R09C
10
9
80
60
40
20
0
RL=
8
7
6
5
RL=9Ω
4
3
2
1
0
RL=
∞
0
5
10
Input voltage Vin(V)
15
20
5
10
15
20
25
0
Input voltage Vin (V)
Figure 2. Quiescent Current vs. Input Voltage
Figure 1. Output Voltage vs. Input Voltage
10
9
8
7
6
5
4
3
2
1
0
9.06
9.04
9.02
9.00
8.98
8.96
8.94
8.92
0
0.5
3
1
1.5
2
2.5
75
TEMPERATURE Tj(oC )
-25
0
25
50
100
125
Disable voltage Vdis (V)
Figure 4. Output Voltage vs. Temperature(Tj)
Figure 3. Output Voltage vs. Disable Voltage
10
8
0.55
0.50
0.45
0.40
6
4
2
0
1.0A
0.35
0.30
0.25
0.20
-25
0
25
50
75
100
125
75
-25
0
25
50
100
125
Junction Temp Tj [
℃
]
Junction temperature Tj(oC)
Figure 6. Dropout Voltage vs.Junction Temperature
Figure 5. Quiescent Current vs. Temperature(Tj)
10
KA78RXXC-SERIES
Typical Performance Characteristics (Continued)
100
20
15
80
60
10
5
40
20
0
1.5
0
0.5
1.0
2.0
2.5
0
-25
75
TEMPERATURE TJ(oC)
0
25
50
100
125
Output Current(A)
Figure 8. Overcurrent Protection Characteristics
(Typical Value)
Figure 7. Power Dissipation vs. Temperature(Tj)
2.75
2.50
2.25
2.00
1.75
1.50
0
1
2
3
4
5
6
Input-output differential voltage Vin-Vo (V)
Figure 9. Output Peak Currenrt vs.
Input-Output Differential Voltage
11
KA78RXXC-SERIES
Typical Performance Characteristics (Continued)
KA78R12C
17.5
15.0
80
60
40
20
0
12.5
RL=
10.0
7.5
RL=12Ω
5.0
RL=
∞
2.5
0
0
5
10
15
20
Input voltage Vin(V)
5
10
15
20
25
0
Input voltage Vin (V)
Figure 2. Quiescent Current vs. Input Voltage
Figure 1. Output Voltage vs. Input Voltage
12.06
17.5
15.0
12.5
12.04
12.02
10.0
7.5
12.00
11.98
5.0
11.96
11.94
2.5
0
11.92
0
0.5
3
1
1.5
2
2.5
75
TEMPERATURE Tj(oC)
-25
0
25
50
100
125
Disable voltage Vdis (V)
Figure 4. Output Voltage vs. Temperature(Tj)
Figure 3. Output Voltage vs. Disable Voltage
10
8
0.55
0.50
0.45
0.40
6
4
2
0
1.0A
0.35
0.30
0.25
0.20
-25
0
25
50
75
100
125
75
-25
0
25
50
100
125
Junction Temp Tj [
℃
]
Junction temperature Tj(oC)
Figure 5. Quiescent Current vs. Temperature(Tj)
Figure 6. Dropout Voltage vs.Junction Temperature
12
KA78RXXC-SERIES
Typical Performance Characteristics (Continued)
20
15
100
80
60
10
5
40
20
0
0
-25
1.5
0
0.5
1.0
2.0
2.5
3.0
75
TEMPERATURE TJ(oC)
0
25
50
100
125
Output Current(A)
Figure 8. Overcurrent Protection Characteristics
(Typical Value)
Figure 7. Power Dissipation vs. Temperature(Tj)
2.75
2.50
2.25
2.00
1.75
1.50
0
1
2
3
4
5
6
Input-output differential voltage Vin-Vo (V)
Figure 9. Output Peak Currenrt vs.
Input-Output Differential Voltage
13
KA78RXXC-SERIES
Typical Performance Characteristics (Continued)
KA78R15C
17.5
15.0
80
60
40
20
0
12.5
RL=
10.0
7.5
RL=15Ω
5.0
RL=
∞
2.5
0
0
5
10
15
20
5
10
15
20
0
25
Input voltage Vin(V)
Input voltage Vin (V)
Figure 1. Output Voltage vs. Input Voltage
Figure 2. Quiescent Current vs. Input Voltage
15.15
17.5
15.0
12.5
10.0
7.5
15.10
15.05
15.00
14.95
5.0
2.5
0
14.90
14.85
14.80
0
0.5
3
1
1.5
2
2.5
75
TEMPERATURE Tj(oC)
-25
0
25
50
100
125
Disable voltage Vdis (V)
Figure 4. Output Voltage vs. Temperature(Tj)
Figure 3. Output Voltage vs. Disable Voltage
10
8
0.55
0.50
0.45
0.40
6
4
2
0
1.0A
0.35
0.30
0.25
0.20
-25
0
25
50
75
100
125
75
-25
0
25
50
100
125
Junction Temp Tj [
℃
]
Junction temperature Tj(oC)
Figure 5. Quiescent Current vs. Temperature(Tj)
Figure 6. Dropout Voltage vs.Junction Temperature
14
KA78RXXC-SERIES
Typical Performance Characteristics (Continued)
20
80
15
60
40
10
5
20
0
1.5
0
-25
0
0.5
1.0
2.0
2.5
3.0
75
TEMPERATURE Tj(oC)
0
25
50
100
125
Output Current(A)
Figure 7. Power Dissipation vs. Temperature(Tj)
Figure 8. Overcurrent Protection Characteristics
(Typical Value)
2.75
2.50
2.25
2.00
1.75
1.50
0
1
2
3
4
5
6
Input-output differential voltage Vin-Vo (V)
Figure 9. Output Peak Currenrt vs.
Input-Output Differential Voltage
15
KA78RXXC-SERIES
Typical Application
Vo
Vin
1
2
3
GND
4
Vdis
Disable Signal
Figure 1. Application Circuit
• Ci is required if regulator is located at an appreciable distance from power supply filter.
• Co improves stability and transient response.(Co > 47µF)
16
KA78RXXC-SERIES
Mechanical Dimensions
Package
Dimensions in millimeters
TO-220F-4L
17
KA78RXXC-SERIES
Mechanical Dimensions (Continued)
Package
Dimensions in millimeters
(Forming)
TO-220F-4L
18
KA78RXXC-SERIES
Mechanical Dimensions (Continued)
Package
Dimensions in millimeters
(Short Lead)
TO-220F-4L
D
19
KA78RXXC-SERIES
Ordering Information
Product Number
KA78R33CTU
KA78R05CTU
KA78R08CTU
KA78R09CTU
KA78R12CTU
KA78R15CTU
KA78R33CYDTU
Package
Operating Temperature
TO-220F-4L
-20°C to +80°C
KA78R05CYDTU
KA78R09CYDTU
KA78R33CTSTU
KA78R05CTSTU
KA78R08CTSTU
KA78R09CTSTU
KA78R12CTSTU
TO-220F-4L(Forming)
TO-220F-4L(Short Lead)
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
8/26/03 0.0m 001
Stock#DSxxxxxxxx
2003 Fairchild Semiconductor Corporation
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