MC7905ACT [FAIRCHILD]
3-Terminal 1A Negative Voltage Regulator; 3端子1A负稳压器
| 型号： | MC7905ACT |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | 3-Terminal 1A Negative Voltage Regulator |
| 文件： | 总18页 (文件大小：119K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
MC79XX/MC79XXA/LM79XX
3-Terminal 1A Negative Voltage Regulator
Features
Description
• Output Current in Excess of 1A
• Output Voltages of -5, -6, -8 , -9, -10, -12, -15, -18 and -
24V
• Internal Thermal Overload Protection
• Short Circuit Protection
The MC79XX / MC79XXA/ LM79XX series of three
terminal negative regulators are available in TO-220
package and with several fixed output voltages, making
them useful in a wide range of applications. Each type
employs internal current limiting, thermal shut down and
safe operating area protection, making it essentially
indestructible.
• Output Transistor Safe Operating Area Compensation
TO-220
Vin
1
1. GND 2. Input 3. Output
Internal Block Digram
GND
R1
VOLTAGE
REFERENCE
R2
Output
+
-
Q1
Q2
PROTECTION
CIRCUITRY
I1
I2
Rsc
Input
Rev. 1.0.1
©2002 Fairchild Semiconductor Corporation
MC79XX/MC79XXA/LM79XX
Absolute Maximum Ratings
Parameter
Symbol
Value
-35
Unit
Input Voltage
V
I
V
Thermal Resistance Junction-Case (Note1)
Thermal Resistance Junction-Air (Note1, 2)
Operating Temperature Range
Storage Temperature Range
Note:
R
R
5
θJC
θJA
°C/W
65
T
OPR
0 ~ +125
-65 ~ +150
°C
°C
T
STG
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 (MC7905/LM7905)
(V = -10V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
Min. Typ. Max.
-4.8 -5.0 -5.2
Unit
T = +25°C
J
Output Voltage
V
V
O
I
= 5mA to 1A, P 15W
O ≤
O
I
-4.75 -5.0
-5.25
V = -7V to -20V
V = -7V to -25V
-
-
35
8
100
50
I
Line Regulation (Note3)
∆V
∆V
T = +25°C
mV
mV
O
J
V = -8V to -12V
I
T = +25°C
J
-
-
10
3
100
50
I
= 5mA to 1.5A
O
Load Regulation (Note3)
O
T =+25°C
J
I
= 250mA to 750mA
O
Quiescent Current
I
T =+25°C
-
-
-
-
3
6
0.5
0.8
-
mA
mA
Q
J
I
= 5mA to 1A
0.05
0.1
O
Quiescent Current Change
∆I
Q
V = -8V to -25V
I
Temperature Coefficient of V
Output Noise Voltage
∆Vo/∆T
I
= 5mA
O
- 0.4
mV/°C
µV
D
f = 10Hz to 100kHz
T =+25°C
A
V
-
54
-
40
60
2
-
-
-
N
f = 120Hz
Ripple Rejection
Dropout Voltage
RR
dB
V
∆V = 10V
I
T = +25°C
J
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T =+25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T =+25°C
J
PK
Note
3. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
2
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7906) (Continued)
(V = -11V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
Min. Typ. Max.
Unit
T = +25°C
J
-5.75
-6
-6.25
Output Voltage
V
V
O
I
= 5mA to 1A, P ≤ 15W
O
O
I
-5.7
-6
-6.3
V = -9V to -21V
V = -8V to -25V
-
-
10
5
120
60
I
Line Regulation (Note1)
Load Regulation (Note1)
∆V
∆V
T = +25°C
mV
mV
O
J
V = -9V to -13V
I
T = +25°C
J
-
-
10
3
120
60
I
= 5mA to 1.5A
O
O
T =+25°C
J
I
= 250mA to 750mA
O
Quiescent Current
I
T =+25°C
-
-
-
-
3
6
0.5
1.3
-
mA
mA
Q
J
I
= 5mA to 1A
0.05
0.1
O
Quiescent Current Change
∆I
Q
V = -8V to -25V
I
Temperature Coefficient of V
Output Noise Voltage
∆Vo/∆T
I
= 5mA
O
-0.5
mV/°C
µV
D
f = 10Hz to 100kHz
T =+25°C
A
V
-
54
-
130
60
2
-
-
-
N
f = 120Hz
Ripple Rejection
Dropout Voltage
RR
dB
V
∆V = 10V
I
T = +25°C
J
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T = +25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T = +25°C
J
PK
Note
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
3
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7908) (Continued)
(V = -14V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
T = +25°C
Min. Typ. Max.
Unit
-7.7
-8
-8.3
J
Output Voltage
V
O
V
I
= 5mA to 1A, P ≤ 15W
O
O
I
-7.6
-8
-8.4
V = -10V to -23V
V = -10.5V to -25V
-
-
10
5
160
80
I
Line Regulation (Note1)
∆V
∆V
T = +25°C
mV
mV
O
O
J
V = -11V to -17V
I
T = +25°C
J
-
-
12
4
160
80
I
= 5mA to 1.5A
O
Load Regulation (Note1)
T =+25°C
J
I
= 250mA to 750mA
O
Quiescent Current
I
T =+25°C
-
-
-
-
3
6
0.5
1
mA
mA
Q
J
I
= 5mA to 1A
0.05
0.1
O
Quiescent Current Change
∆I
Q
V = -10.5V to -25V
I
Temperature Coefficient of V
Output Noise Voltage
∆Vo/∆T
I
= 5mA
O
-0.6
-
mV/°C
µV
D
f = 10Hz to 100kHz
T =+25°C
A
V
-
54
-
175
60
2
-
-
-
N
f = 120Hz
Ripple Rejection
Dropout Voltage
RR
dB
V
∆V = 10V
I
T = +25°C
J
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T = +25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T = +25°C
J
PK
Note
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
4
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7909) (Continued)
(V = -15V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
T = +25°C
J
-8.7
-9.0
-9.3
Output Voltage
V
V
O
I
= 5mA to 1A, P ≤ 15W
O
O
I
-8.6
-9.0
-9.4
V = -1.5V to -23V
V = -11.5V to -26V
-
-
10
5
180
90
I
Line Regulation (Note1)
∆V
∆V
T = +25°C
mV
O
J
V = -12V to -18V
I
T = +25°C
J
-
-
12
4
180
90
I
= 5mA to 1.5A
O
Load Regulation (Note1)
mV
O
T = +25°C
J
I
= 250mA to 750mA
O
Quiescent Current
I
T = +25°C
-
-
-
-
3
6
0.5
1
mA
mA
Q
J
I
= 5mA to 1A
0.05
0.1
O
Quiescent Current Change
∆I
Q
V = -11.5V to -26V
I
Temperature Coefficient of V
Output Noise Voltage
∆Vo/∆T
I
= 5mA
O
-0.6
-
mV/°C
µV
D
f = 10Hz to 100kHz
T = +25°C
A
V
-
54
-
175
60
2
-
-
-
N
f = 120Hz
Ripple Rejection
Dropout Voltage
RR
dB
V
∆V = 10V
I
T = +25°C
J
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T = +25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T = +25°C
J
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
5
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7910) (Continued)
(V = -17V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
T = +25°C
J
-9.6
-10 -10.4
Output Voltage
V
O
V
I
= 5mA to 1A, P ≤ 15W
d
O
I
-9.5
-10 -10.5
V = -12V to -28
V = -12.5V to -28V
-
-
12
6
200
100
I
Line Regulation (Note1)
∆V
∆V
T = +25°C
mV
O
O
J
V = -14V to -20V
I
T = +25°C
J
-
-
12
4
200
100
I
= 5mA to 1.5A
O
Load Regulation (Note1)
mV
T = +25°C
J
I
= 250mA to 750mA
O
Quiescent Current
I
T = +25°C
-
-
-
-
3
0.05
0.1
-1
6
0.5
1
mA
mA
Q
J
I
= 5mA to 1A
O
Quiescent Current Change
∆I
Q
V = -12.5V to -28V
I
Temperature Coefficient of V
Output Noise Voltage
∆Vo/∆T
I
= 5mA
O
-
mV/°C
µV
O
10Hz ≤ f ≤ 100kHz
T =+25°C
A
V
-
54
-
280
60
2
-
-
-
N
f = 120Hz
Ripple Rejection
Dropout Voltage
RR
dB
V
∆V = 10V
I
T = +25°C
J
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T = +25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T = +25°C
J
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
6
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7912) (Continued)
(V = -19V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
Min. Typ. Max.
Unit
T = +25°C
J
-11.5 -12 -12.5
Output Voltage
V
V
O
I
= 5mA to 1A, P ≤ 15W
O
O
I
-11.4 -12 -12.6
V = -15.5V to -27V
V = -14.5V to -30V
-
-
12
6
240
120
I
Line Regulation (Note1)
∆V
∆V
T = +25°C
mV
mV
O
O
J
V = -16V to -22V
I
T = +25°C
J
-
-
12
4
240
120
I
= 5mA to 1.5A
O
Load Regulation (Note1)
T = +25°C
J
I
= 250mA to 750mA
O
Quiescent Current
I
T = +25°C
-
-
-
-
3
6
0.5
1
mA
mA
Q
J
I
= 5mA to 1A
0.05
0.1
O
Quiescent Current Change
∆I
Q
V = -14.5V to -30V
I
Temperature Coefficient of V
Output Noise Voltage
∆Vo/∆T
I
= 5mA
O
-0.8
-
mV/°C
µV
D
f = 10Hz to 100kHz
T = +25°C
A
V
-
54
-
200
60
2
-
-
-
N
f = 120Hz
Ripple Rejection
Dropout Voltage
RR
dB
V
∆V = 10V
I
T = +25°C
J
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T = +25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T = +25°C
J
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
7
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7915) (Continued)
(V = -23V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
-14.4 -15 -15.6
T = +25°C
J
Output Voltage
V
V
O
I
= 5mA to 1A, P ≤ 15W
O
O
I
-14.25 -15 -15.75
V = -18V to -30V
V = -17.5V to -30V
-
-
12
6
300
150
I
Line Regulation (Note1)
∆V
∆V
T = +25°C
mV
O
O
J
V = -20V to -26V
I
T = +25°C
J
-
-
12
4
300
150
I
= 5mA to 1.5A
O
Load Regulation (Note1)
mV
T = +25°C
J
I
= 250mA to 750mA
O
Quiescent Current
I
T = +25°C
-
-
-
-
3
6
0.5
1
mA
mA
Q
J
I
= 5mA to 1A
0.05
0.1
O
Quiescent Current Change
∆I
Q
V = -17.5V to -30V
I
Temperature Coefficient of V
Output Noise Voltage
∆Vo/∆T
I
= 5mA
O
-0.9
-
mV/°C
µV
D
f = 10Hz to 100kHz
T =+25°C
A
V
-
54
-
250
60
2
-
-
-
N
f = 120Hz
Ripple Rejection
Dropout Voltage
RR
dB
V
∆V = 10V
I
T = +25°C
J
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T = +25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T = +25°C
J
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
8
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7918) (Continued)
(V = -27V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
T = +25°C
J
-17.3 -18 -18.7
Output Voltage
V
O
V
I
= 5mA to 1A, P ≤ 15W
O
O
I
-17.1 -18 -18.9
V = -22.5V to -33V
V = -21V to -33V
-
-
15
8
360
180
I
Line Regulation (Note1)
∆V
∆V
T = +25°C
mV
mV
O
O
J
V = -24V to -30V
I
T = +25°C
J
-
-
15
360
I
= 5mA to 1.5A
O
Load Regulation (Note1)
T = +25°C
J
5
3
180
6
I
= 250mA to 750mA
O
Quiescent Current
I
T = +25°C
J
-
-
-
-
mA
mA
Q
I
= 5mA to 1A
0.05 0.5
O
Quiescent Current Change
∆I
Q
V = -21V to -33V
I
0.1
-1
1
-
Temperature Coefficient of V
Output Noise Voltage
∆Vo/∆T
I
= 5mA
O
mV/°C
µV
D
f = 10Hz to 100kHz
V
N
-
54
-
300
60
2
-
-
-
T = +25°C
A
f = 120Hz
Ripple Rejection
Dropout Voltage
RR
dB
V
∆V = 10V
I
T = +25°C
J
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T = +25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T = +25°C
J
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
9
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7924) (Continued)
(V = -33V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
-23 -24 -25
T = +25°C
J
Output Voltage
V
V
O
I
= 5mA to 1A, P ≤ 15W
O
O
I
-22.8 -24 -25.2
V = -27V to -38V
V = -27V to -38V
-
-
15
8
480
180
I
Line Regulation (Note1)
∆V
∆V
T = +25°C
mV
O
O
J
V = -30V to -36V
I
T = +25°C
J
-
-
15
5
480
240
I
= 5mA to 1.5A
O
Load Regulation (Note1)
mV
T = +25°C
J
I
= 250mA to 750mA
O
Quiescent Current
I
T = +25°C
-
-
-
-
3
0.05
0.1
-1
6
0.5
1
mA
mA
Q
J
I
= 5mA to 1A
O
Quiescent Current Change
∆I
Q
V = -27V to -38V
I
Temperature Coefficient of V
Output Noise Voltage
∆Vo/∆T
I
= 5mA
O
-
mV/°C
µV
D
f = 10Hz to 100kHz
T = +25°C
A
V
-
54
-
400
60
2
-
-
-
N
f = 120Hz
Ripple Rejection
Dropout Voltage
RR
dB
V
∆V = 10V
I
T = +25°C
J
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T = +25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T = +25°C
J
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
10
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7905A) (Continued)
(V = -10V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
T = +25°C
J
-4.9 -5.0 -5.1
Output Voltage
V
V
O
I
= 5mA to 1A, P ≤ 15W
O
O
I
- 4.8 -5.0 -5.2
V = -7V to -20V
V = -7V to -20V I =1A
-
-
-
-
-
5
2
50
25
I
O
T = +25°C
J
V = -8V to -12V I =1A
I
O
Line Regulation (Note1)
Load Regulation (Note1)
∆V
∆V
mV
mV
O
O
V = -7.5V to -25V
I
7
50
V = -8V to -12V , I =1A
7
50
I
O
T =+25°C, I = 5mA to 1.5A
10
100
J
O
T = +25°C
J
-
3
50
I
= 250mA to 750mA
O
Quiescent Current
I
T = +25°C
-
-
-
3
6
mA
mA
Q
J
I
= 5mA to 1A
0.05 0.5
O
Quiescent Current Change
Temperature Coefficient of
∆I
Q
V = -8V to -25V
I
0.1
0.8
∆Vo/∆T
I
= 5mA
-
-
- 0.4
-
mV/°C
µV
O
V
D
f = 10Hz to 100kHz
T = +25°C
A
Output Noise Voltage
Ripple Rejection
Dropout Voltage
V
40
60
2
-
-
-
N
f = 120Hz
RR
54
-
dB
∆V = 10V
I
T = +25°C
J
V
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T = +25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T = +25°C
J
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
11
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7912A) (Continued)
(V = -19V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
T = +25°C
-11.75 -12 -12.25
V
J
Output Voltage
V
O
I
= 5mA to 1A, P ≤ 15W
O
O
-11.5
-12
12
6
-12.5
120
60
V = -15.5V to -27V
I
V = -14.5V to -27V
Io = 1A
I
-
-
T = +25°C
J
V = -16V to -22V
I
Io = 1A
Line Regulation (Note1)
∆V
∆V
mV
O
O
V = -14.8V to -30V
-
-
12
12
120
120
I
V = -16V to -22V, Io = 1A
I
T = +25°C
J
-
-
12
4
150
75
I
= 5mA to 1.5A
O
Load Regulation (Note1)
mV
T = +25°C
J
I
= 250mA to 750mA
O
Quiescent Current
I
T = +25°C
-
-
-
-
3
6
0.5
1
mA
mA
Q
J
I
= 5mA to 1A
0.05
0.1
O
Quiescent Current Change
∆I
Q
V = -15V to -30V
I
Temperature Coefficient of V
Output Noise Voltage
∆Vo/∆T
I
= 5mA
O
-0.8
-
mV/°C
µV
D
f = 10Hz to 100kHz
T = +25°C
A
V
-
54
-
200
60
2
-
-
-
N
f = 120Hz
Ripple Rejection
Dropout Voltage
RR
dB
V
∆V = 10V
I
T = +25°C
J
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T = +25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T = +25°C
J
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
12
MC79XX/MC79XXA/LM79XX
Electrical Characteristics (MC7915A) (Continued)
(V = -23V, I = 500mA, 0°C ≤T ≤ +125°C, C =2.2µF, C =1µF, unless otherwise specified.)
I
O
J
I
O
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
T = +25°C
J
-14.7
-15
-15.3
Output Voltage
V
V
O
I
= 5mA to 1A, P ≤ 15W
O
O
I
-14.4
-15
-15.6
V = -18V to -30V
V = -17.5V to -30V
I
Io = 1A
-
-
12
6
150
75
T = +25°C
J
V = -20V to -26V
I
Io = 1A
Line Regulation (Note1)
∆V
mV
O
O
V = -17.9V to -30V
-
-
12
6
150
150
I
V = -20V to -26V, Io = 1A
I
T = +25°C
J
-
-
12
4
150
75
I
= 5mA to 1.5A
O
Load Regulation (Note1)
∆V
mV
T = +25°C
J
I
= 250mA to 750mA
O
Quiescent Current
I
T = +25°C
-
-
-
-
3
6
0.5
1
mA
mA
Q
J
I
= 5mA to 1A
0.05
0.1
O
Quiescent Current Change
∆I
Q
V = -18.5V to -30V
I
Temperature Coefficient of V
Output Noise Voltage
∆Vo/∆T
I
= 5mA
O
-0.9
-
mV/°C
µV
D
f = 10Hz to 100kHz
T = +25°C
A
V
-
54
-
250
60
2
-
-
-
N
f = 120Hz
Ripple Rejection
Dropout Voltage
RR
dB
V
∆V = 10V
I
T = +25°C
J
V
D
I
= 1A
O
Short Circuit Current
Peak Current
I
T = +25°C, V = -35V
-
-
300
2.2
-
-
mA
A
SC
J
I
I
T = +25°C
J
PK
Note:
1. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken
O
into account separately. Pulse testing with low duty is used.
13
MC79XX/MC79XXA/LM79XX
Typical Perfomance Characteristics
5. 1
15
Vin=10V
13
11
9
Io=1.5A
Io=40mA
5. 05
5
7
4. 95
4. 9
5
3
Vin=25V
1
- 1
- 3
- 5
Io=100mA
Io=0.75A
4. 85
4. 8
- 40
- 25
0
25
50
75
100
125
- 40
- 25
0
25
50
75
100
125
TA, Ambient Temperature [ oC]
TA, Ambient Temperature [oC]
Figure 1. Output Voltage
Figure 2. Load Regulation
4
5
4. 5
4
3. 5
3
3. 5
3
2. 5
2
2. 5
2
1. 5
1
0. 5
0
1. 5
1
Io=1A
0. 5
0
- 40
- 25
0
25
50
75
100
125
- 40 - 25
0
25
50
75
100 125
TA, Ambient Temperature [oC]
TA, Ambient Temperature [oC]
Figure 3. Quiescent Current
Figure 4. Dropout Voltage
0. 6
0. 55
0. 5
0. 45
0. 4
0. 35
0. 3
0. 25
0. 2
0. 15
0. 1
0. 05
S
c
t
r
[
0
- 0. 05
- 0. 1
- 40
- 25
0
25
50
75
100
125
o
A
T , Ambient Temperature [ C]
Figure 5. Short Circuit Current
14
MC79XX/MC79XXA/LM79XX
Typical Applications
2.2µF
1µF
+
+
1
CO
CI
2
3
MC79XX
Input
-
Output
LM79XX
Figure 6. Negative Fixed output regulator
3
1
MC7812
2
+ 15V
+12V
+
+
+
Co
1µF
1N4001
C1
C1
0.33µF
*
GND
-12V
2.2µF
1µF
Co
+
1N4001
1
*
2
3
MC7912
- 15V
Figure 7. Split power supply ( ± 12V/1A)
Notes:
(1) To specify an output voltage, substitute voltage value for "XX "
(2) Required for stability. For value given, capacitor must be solid tantalum. If aluminium electronics are used, at least ten times
value shown should be selected. C is required if regulator is located an appreciable distance from power supply filter.
I
(3) To improve transient response. If large capacitors are used, a high current diode from input to output (1N400l or similar)
should be introduced to protect the device from momentary input short circuit.
15
MC79XX/MC79XXA/LM79XX
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
(45
°
)
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
16
MC79XX/MC79XXA/LM79XX
Ordering Information
Product Number Output Voltage Tolerance Package
Operating Temperature
LM7905CT
±4%
TO-220
0 ~ +125°C
Product Number Output Voltage Tolerance Package
Operating Temperature
MC7905CT
MC7906CT
MC7908CT
MC7909CT
MC7910CT
MC7912CT
MC7915CT
MC7918CT
MC7924CT
MC7905ACT
MC7912ACT
MC7915ACT
±4%
±2%
TO-220
0 ~ +125°C
17
MC79XX/MC79XXA/LM79XX
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.
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11/12/02 0.0m 001
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