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KA78T05TU

P1-P3P4-P6P7-P8
©2002 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
Features
• Output Current in Excess of 3.0A
• Output Transistor Safe Operating Area Compensation
• Power Dissipation: 25W
• Internal Short Circuit Current Limiting
• Internal Thermal Overload Protection
• Output Voltage Offered in 4% Tolerance
• No External Components Required
• Output Voltage of 5, 12 and 15V
Description
This family of fixed voltage regulators are monolithic
integrated circuit capable of driving loads in excess of 3.0A.
TO-220
1.Input 2. GND 3. Output
1
GND
Internal Block Diagram
SERIES
PASS
ELEMENT
SOA
PROTECTION
ERROR
AMPLIFIER
THERMAL
PROTECTION
CURRENT
GENERATOR
REFERENCE
VOLTAGE
STARTING
CIRCUIT
OUTPUT
3
GND
2
INPUT
1
KA78TXX
3-Terminal 3A Positive Voltage Regulator
KA78TXX
2
Absolute Maximum Ratings
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.
Electrical Characteristics(KA78T05)
(V
I
= 10V, I
O
= 3.0 A, 0°C ≤ T
J
≤ +125°C, Po ≤ P
MAX
(Note3), unless otherwise specified.)
Note:
3. Although power dissipation is internally limited, specifications apply only for P
O
≤ Pmax, Pmax = 25W
4. Load and line regulation are specified at constant junction temperature. Change in Vo due heating effects must be taken into
account separately. Pulse testing with low duty is used.
Parameter Symbol Value Unit
Input Voltage (for V
O
= 5V to 12V)
(for V
O
= 15V)
V
I
35
40
V
V
Power Dissipation PD Internally limited -
Thermal Resistance, Junction to Air (Note1, 2)
Ta = +25°C
RθJA 65 °C/W
Thermal Resistance, Junction to Case (Note1)
Tc = +25°C
RθJC 2.5 °C/W
Operating Junction Temperature Range T
J
0 ~ +125 °C
Storage Temperature Range T
STG
-65 ~ +150 °C
Parameter Symbol Conditions Min. Typ. Max. Unit
Output Voltage Vo
5mA ≤
≤≤
≤ Io ≤
≤≤
≤ 3.0A, T
J
= +25°C
7.3V ≤
≤≤
≤ VI ≤
≤≤
≤ 20V, 5mA ≤
≤≤
≤ Io ≤
≤≤
≤ 2.0A
4.8
4.75
5.0
5.0
5.2
5.25
V
Line Regulation (Note4) ∆V
O
7.2V ≤
≤≤
≤ VI ≤
≤≤
≤ 35V, Io=5mA, T
J
= +25°C
7.2V ≤
≤≤
≤ VI ≤
≤≤
≤ 35V, Io=1.0A, T
J
= +25°C
7.5V ≤
≤≤
≤ VI ≤
≤≤
≤ 20V, Io =2.0A, T
J
= +25°C
8.0V ≤
≤≤
≤ VI ≤
≤≤
≤ 12V, Io =3.0A, T
J
= +25°C
-3.025mV
Load Regulation (Note4) ∆V
O
5mA ≤ Io ≤ 3.0A, T
J
= +25°C
5mA ≤ Io ≤ 3.0A
-
10
15
30
80
mV
mV
Thermal Regulation
REG
T
Pulse =10ms, P = 20W
TA = +25°C
- 0.002 0.03 %Vo/W
Quiescent Current I
Q
5mA ≤ Io ≤ 3.0A, T
J
= +25°C
5mA ≤ Io ≤ 3.0A
-
3.5
4.0
5.0
6.0
mA
mA
Quiescent Current Change
∆I
Q
7.2V ≤ VI ≤ 35V, Io = 5mA
T
J
= +25°C ;
7.5V ≤ VI ≤ 20V, Io =2.0A ;
5mA ≤ Io ≤ 3.0A, T
J
= +25°C
-0.10.8mA
Ripple Rejection RR
f = 120Hz, 8V ≤ V
I
≤ 18V, I
o
= 2.0A
T
J
= +25°C
-75- dB
Dropout Voltage V
D
Io = 3A ,T
J
= +25°C-2.22.5V
Output Noise Voltage V
N
T
A
= +25°C, 10Hz ≤ f ≤ 100kHz - 10 - µV/Vo
Peak Output Current I
PK
T
A
= +25°C-5.0-A
Output Resistance Ro f = 1.0kHz - 2.0 - mΩ
Short Circuit Current Limit Isc VI = 35V, T
J
=+25°C-1.52.5A
Average Temperature
Coefficient of Output Voltage
∆V
O
/∆T Io = 5.0mA - 0.2 - mV/°C
KA78TXX
3
Electrical Characteristics(KA78T12)
(Continued)
(V
I
= 19V, I
O
= 3.0 A, 0°C ≤ T
J
≤ +125°C, Po ≤ P
MAX
(Note1), unless otherwise specified.)
Note:
1. Although power dissipation is internally limited, specifications apply only for P
O
≤ Pmax, Pmax = 25W
2. Load and line regulation are specified at constant junction temperature. Change in Vo due heating effects must be taken into
account separately. Pulse testing with low duty is used. ( P
MAX
= 25W)
Parameter Symbol Conditions Min. Typ. Max. Unit
Output Voltage Vo
5mA ≤ Io ≤ 3.0A, T
J
=+25°C
14.5V ≤ VI ≤ 27V, 5mA ≤ Io ≤ 2.0A
11.5
11.4
12
12
12.5
12.8
V
Line Regulation (Note2) ∆V
O
14.5V ≤ VI ≤ 35V, Io=5mA, T
J
=+25°C
14.5V ≤ VI ≤ 35V, Io=1.0A, T
J
=+25°C
14.9V ≤ VI ≤ 28V, Io =2.0A, T
J
=+25°C
16V ≤ VI ≤ 22V, Io =3.0A, T
J
=+25°C
-6.045mV
Load Regulation (Note2) ∆V
O
5mA ≤ Io ≤ 3.0A, T
J
=+25°C
5mA ≤ Io ≤ 3.0A
-
10
15
30
80
mV
mV
Thermal Regulation
REG
T
Pulse =10ms, P = 20W
TA = +25°C
- 0.002 0.03 %Vo/W
Quiescent Current I
Q
5mA ≤ Io ≤ 3.0A, T
J
=+25°C
5mA ≤ Io ≤ 3.0A
-
3.5
4.0
5.0
6.0
mA
mA
Quiescent Current Change ∆I
Q
14.5V ≤ VI ≤ 35V, Io = 5mA
T
J
=+25°C ;
14.9V ≤ VI ≤ 27V, Io =2.0A
5mA ≤ Io ≤ 3.0A, T
J
=+25°C
-0.10.8mA
Ripple Rejection RR
f = 120Hz, 15V ≤ V
I
≤ 25V, Io = 2.0A
T
J
=+25°C
-67- dB
Dropout Voltage V
D
Io = 3A ,T
J
=+25°C-2.22.5V
Output Noise Voltage V
N
T
A
=+25°C, 10Hz ≤ f ≤ 100kHz - 10 - µV/Vo
Peak Output Current I
PK
T
A
=+25°C-5.0-A
Output Resistance Ro f = 1.0kHz - 2.0 - mΩ
Short Circuit Current Limit Isc VI = 35V, T
J
=+25°C-1.52.5A
Average Temperature
Coefficient of Output Voltage
∆V
O
/∆T Io = 5.0mA - 0.5 - mV/°C
P1-P3P4-P6P7-P8

KA78T05TU

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Manufacturer:
ON Semiconductor / Fairchild
Description:
Linear Voltage Regulators Positive Voltage Reg 3Terminal 3a
Lifecycle:
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