MC78T15 [FAIRCHILD]
3-Terminal 3A Positive Voltage Regulator; 三端3A正电压稳压器
| 型号： | MC78T15 |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | 3-Terminal 3A Positive Voltage Regulator |
| 文件： | 总8页 (文件大小：47K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
MC78TXX
3-Terminal 3A Positive Voltage Regulator
Features
Description
• Output Current in Excess of 3.0A
• Output Transistor Safe Operating Area Compensation
• Power Dissipation :25W
This family of fixed voltage regulators are monolithic
integrated circuit capable of driving loads in excess of 3.0 A.
• 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
TO-220
GND
1
1.Input 2. GND 3. Output
Internal Block Diagram
OUTPUT
3
INPUT
1
SERIES
PASS
ELEMENT
CURRENT
GENERATOR
SOA
PROTECTION
REFERENCE
VOLTAGE
ERROR
AMPLIFIER
STARTING
CIRCUIT
THERMAL
PROTECTION
GND
2
Rev. 1.0.1
©2002 Fairchild Semiconductor Corporation
MC78TXX
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
Input Voltage (for V = 5V to 12V)
(for V = 15V)
O
35
40
V
V
O
V
I
Power Dissipation
PD
Internally limited
Thermal Resistance, Junction to Air (Note1, 2)
Ta = +25°C
RθJA
65
°C/W
°C/W
Thermal Resistance, Junction to Case (Note1)
Tc = +25°C
RθJC
2.5
Operating Junction Temperature Range
Storage Temperature Range
T
0 ~ +125
°C
°C
J
T
-65 ~ +150
STG
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(MC78T05)
(V = 10V, I = 3.0 A, 0°C ≤ T ≤ +125°C, Po ≤ P (Note3), unless otherwise specified. )
MAX
I
O
J
Parameter
Symbol
Conditions
Min. Typ. Max.
Unit
5mA ≤ Io ≤ 3.0A , T = +25°C
7.3V ≤ VI ≤ 20V, 5mA ≤ Io ≤ 2.0A
4.8
4.75
5.0
5.0
5.2
5.25
J
Output Voltage
Vo
V
7.2V ≤ VI ≤ 35V , Io=5mA, T =+25°C
J
7.2V ≤ VI ≤ 35V , Io=1.0A, T = +25°C
J
Line Regulation (Note4)
∆V
∆V
-
3.0
25
mV
O
O
7.5V ≤ VI ≤ 20V, Io =2.0A, T = +25°C
J
8.0V ≤ VI ≤ 12V, Io =3.0A, T = +25°C
J
5mA ≤ Io ≤ 3.0A , T = +25°C
10
15
30
80
mV
mV
J
Load Regulation (Note4)
Thermal Regulation
-
-
-
5mA ≤ Io ≤ 3.0A
Pulse =10ms, P = 20W
T = +25°C
A
REG
0.002 0.03 %Vo/W
T
5mA ≤ Io ≤ 3.0A , T = +25°C
3.5
4.0
5.0
6.0
mA
mA
J
Quiescent Current
I
Q
5mA ≤ Io ≤ 3.0A
7.2V ≤ VI ≤ 35V, Io = 5mA
T = +25°C ;
7.5V ≤ VI ≤ 20V, Io =2.0A ;
5mA ≤ Io ≤ 3.0A, T = +25°C
J
Quiescent Current Change
Ripple Rejection
∆I
-
0.1
0.8
-
mA
Q
J
f = 120Hz, 8V ≤ V ≤ 18V, I = 2.0A
T = +25°C
J
I
o
RR
-
75
dB
Dropout Voltage
V
V
Io = 3A ,T = +25°C
-
-
-
-
-
2.2
10
2.5
V
µV/Vo
A
D
N
J
Output Noise Voltage
Peak Output Current
Output Resistance
T = +25°C, 10Hz ≤ f ≤ 100kHz
A
-
-
I
T = +25°C
A
5.0
2.0
1.5
PK
Ro
Isc
f = 1.0kHz
-
mΩ
A
Short Circuit Current Limit
VI = 35V, T =+25°C
2.5
J
Average Temperature
∆V /∆T Io = 5.0mA
-
0.2
-
mV/°C
O
Coefficient of Output Voltage
Note:
3. Although power dissipation is internally limited, specifications apply only for P ≤ Pmax, Pmax = 25W
O
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.
2
MC78TXX
Electrical Characteristics(MC78T12) (Continued)
(V = 19V, I = 3.0 A, 0°C ≤ T ≤ +125°C, Po ≤ P (Note1), unless otherwise specified. )
MAX
I
O
J
Parameter
Symbol
Conditions
Min. Typ. Max.
Unit
5mA ≤ Io ≤ 3.0A , T =+25°C
14.5V ≤ VI ≤ 27V, 5mA ≤ Io ≤ 2.0A
11.5
11.4
12
12
12.5
12.8
J
Output Voltage
Vo
V
14.5V ≤ VI ≤ 35V, Io=5mA, T =+25°C
J
14.5V ≤ VI ≤ 35V, Io=1.0A, T =+25°C
J
Line Regulation (Note2)
∆V
∆V
-
6.0
45
mV
O
O
14.9V ≤ VI ≤ 28V, Io =2.0A, T =+25°C
J
16V ≤ VI ≤ 22V, Io =3.0A, T =+25°C
J
5mA ≤ Io ≤ 3.0A, T =+25°C
10
15
30
80
mV
mV
J
Load Regulation (Note2)
Thermal Regulation
-
-
-
5mA ≤ Io ≤ 3.0A
Pulse =10ms, P = 20W
TA = +25°C
REG
0.002 0.03 %Vo/W
T
5mA ≤ Io ≤ 3.0A, T =+25°C
3.5
4.0
5.0
6.0
mA
mA
J
Quiescent Current
I
Q
5mA ≤ Io ≤ 3.0A
14.5V ≤ VI ≤ 35V, Io = 5mA
∆I
T =+25°C ;
14.9V ≤ VI ≤ 27V, Io =2.0A ;
5mA ≤ Io ≤ 3.0A, T =+25°C
Q
J
Quiescent Current Change
Ripple Rejection
-
-
0.1
0.8
-
mA
J
f = 120Hz, 15V ≤ V ≤ 25V, Io = 2.0A
T =+25°C
J
I
RR
67
dB
Dropout Voltage
V
V
Io = 3A,T =+25°C
-
-
-
-
-
2.2
10
2.5
V
µV/Vo
A
D
N
J
Output Noise Voltage
Peak Output Current
Output Resistance
T =+25°C, 10Hz ≤ f ≤ 100kHz
A
-
-
I
T =+25°C
A
5.0
2.0
1.5
PK
Ro
Isc
f = 1.0kHz
-
mΩ
A
Short Circuit Current Limit
Average Temperature
Coefficient of Output Voltage
VI = 35V, T =+25°C
2.5
J
∆V /∆T Io = 5.0mA
-
0.5
-
mV/°C
O
Note:
1. Although power dissipation is internally limited, specifications apply only for P ≤ Pmax, Pmax = 25W
O
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 = 25W)
MAX
3
MC78TXX
Electrical Characteristics(MC78T15) (Continued)
(V = 23V, I = 3.0 A, 0°C ≤ T ≤ +125°C, Po ≤ P (Note1), unless otherwise specified. )
MAX
I
O
J
Parameter
Symbol
Conditions
Min. Typ. Max.
Unit
5mA ≤ Io ≤ 3.0A, T =+25°C
17.5V ≤ VI ≤ 30V, 5mA ≤ Io ≤ 2.0A
14.4
14.25
15
15
15.6
15.75
J
Output Voltage
Vo
V
17.6V ≤ VI ≤ 40V, Io=5mA, T =+25°C
J
17.6V ≤ VI ≤ 40V, Io=1.0A, T =+25°C
J
Line Regulation (Note2)
∆V
∆V
-
7.5
55
mV
O
O
18V ≤ VI ≤ 30V, Io =2.0A, T =+25°C
J
20V ≤ VI ≤ 26V, Io =3.0A, T =+25°C
J
5mA ≤ Io ≤ 3.0A, T =+25°C
10
15
30
80
mV
mV
J
Load Regulation (Note2)
Thermal Regulation
-
-
-
5mA ≤ Io ≤ 3.0A
Pulse =10ms, P = 20W
TA = +25°C
REG
0.002 0.03 %Vo/W
T
5mA ≤ Io ≤ 3.0A, T =+25°C
3.5
4.0
5.0
6.0
mA
mA
J
Quiescent Current
I
Q
5mA ≤ Io ≤ 3.0A
17.6V ≤ VI ≤ 40V, Io = 5mA
T =+25°C ;
J
∆I
Q
Quiescent Current Change
Ripple Rejection
-
-
0.1
0.8
-
mA
18V ≤ VI ≤ 30V, Io =2.0A ;
5mA ≤ Io ≤ 3.0A, T =+25°C
J
f = 120Hz, 18.5V ≤ V ≤ 28.5V, Io = 2.0A
I
RR
65
dB
T =+25°C
J
Dropout Voltage
V
V
Io = 3A ,T = +25°C
-
-
-
-
-
2.2
10
2.5
V
µV/Vo
A
D
N
J
Output Noise Voltage
Peak Output Current
Output Resistance
T = +25°C, 10Hz ≤ f ≤ 100kHz
A
-
-
I
T = +25°C
A
5.0
2.0
1.0
PK
Ro
Isc
f = 1.0kHz
-
mΩ
A
Short Circuit Current Limit
Average Temperature
Coefficient of Output Voltage
VI = 40V, T = +25°C
2.0
J
∆V /∆T Io = 5.0mA
-
0.5
-
mV/°C
O
Note:
1. Although power dissipation is internally limited, specifications apply only for P ≤ Pmax, Pmax = 25W
O
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
= 25W)
MAX
4
MC78TXX
Typical Application
1
3
KA78TXX
INPUT
MC78TXX
OUTPUT
2
µF
0.33
0. 1
µ
F
Note:
1. To specify an output voltage, substitute voltage value for “XX”.
2. Bypass Capacitors are recommend for optimum stability and transient response and should be located as close as possible
to the regulator
5
MC78TXX
Mechanical Dimensions
Package
Dimensions in millimeters
TO-220
4.50 ±0.20
9.90 ±0.20
(8.70)
+0.10
–0.05
1.30
ø3.60 ±0.10
1.27 ±0.10
1.52 ±0.10
0.80 ±0.10
+0.10
–0.05
0.50
2.40 ±0.20
2.54TYP
2.54TYP
[2.54 ±0.20
]
[2.54 ±0.20]
10.00 ±0.20
6
MC78TXX
Ordering Information
Product Number
MC78T05CT
MC78T12CT
MC78T15CT
Package
Operating Temperature
TO-220
0 ~ +125°C
7
MC78TXX
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
11/12/02 0.0m 001
Stock#DSxxxxxxxx
2002 Fairchild Semiconductor Corporation
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