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KA79XX / KA79XXA / LM79XX
3-Terminal 1 A Negative Voltage Regulator
Features
Description
• Output Current in Excess of 1 A
• Output Voltages of: -5 V, -6 V, -8 V, -9 V, -12 V, -15 V,
-18 V, -24 V
• Internal Thermal Overload Protection
• Short-Circuit Protection
• Output Transistor Safe Operating Area Compensation
The KA79XX / KA79XXA / LM79XX series of three-terminal negative regulators are available in a TO-220 package with several fixed output voltages, making them
useful in a wide range of applications. Each type employs
internal current limiting, thermal shutdown, and safe
operating area protection.
TO-220
Input
1
1. GND 2. Input 3. Output
Ordering Information
Product Number
Output Voltage
Tolerance
Package
Packing Method
Operating
Temperature
Rail
0 to +125°C
KA7905TU
KA7906TU
KA7908TU
KA7909TU
KA7912TU
±4%
TO-220
(Dual Gauge)
KA7915TU
KA7918TU
KA7924TU
KA7912ATU
KA7915ATU
±2%
LM7905CT
LM7908CT
LM7909CT
LM7910CT
±4%
TO-220
(Single Gauge)
LM7912CT
LM7915CT
LM7918CT
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
September 2014
GND
R1
VOLTAGE
REFERENCE
R2
Out
Output
+
Q1
Q2
I1
PROTECTION
CIRCUITRY
I2
Rsc
In
Input
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. Values are at TA = 25°C unless otherwise noted.
Symbol
VI
Parameter
Value
Input Voltage
Unit
-35
V
RθJC
Thermal Resistance, Junction-Case(1)
5
°C/W
RθJA
Thermal Resistance, Junction-Air(1, 2)
65
°C/W
TOPR
Operating Temperature Range
0 to +125
°C
TSTG
Storage Temperature Range
- 65 to +150
°C
Notes:
1. Thermal resistance test board, size: 76.2 mm x 114.3 mm x 1.6 mm(1S0P), JEDEC standard:
JESD51-3, JESD51-7.
2. Assume no ambient airflow.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
2
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Block Diagram
(VI = -10 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO = 1 μF; unless otherwise specified.)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
TJ = +25°C
-4.80
-5.00
-5.20
Output Voltage
IO = 5 mA to 1 A, PO ≤ 15 W,
VI = -7 V to -20 V
-4.75
-5.00
-5.25
ΔVO
Line Regulation(3)
TJ = +25°C
VI = -7 V to -25 V
35
100
VI = -8 V to -12 V
8
50
ΔVO
Load Regulation(3)
TJ = +25°C, IO = 5 mA to 1.5 A
10
100
TJ = +25°C, IO = 250 mA to 750 mA
3
50
IQ
Quiescent Current
TJ = +25°C
3
6
ΔIQ
Quiescent Current
Change
IO = 5 mA to 1 A
0.05
0.50
VI = -8 V to -25 V
0.10
0.80
IO = 5 mA
-0.4
mV/°C
40
μV
60
dB
2
V
VO
ΔVo/ΔT
Temperature Coefficient
of VD
V
mV
mV
mA
mA
VN
Output Noise Voltage
f = 10 Hz to 100 kHz, TA = +25°C
RR
Ripple Rejection
f = 120 Hz, ΔVI = 10 V
VD
Dropout Voltage
TJ = +25°C, IO = 1 A
ISC
Short-Circuit Current
TJ = +25°C, VI = -35 V
300
mA
IPK
Peak Current
TJ = +25°C
2.2
A
54
Note:
3. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
3
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7905 / LM7905)
(VI = -11 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO = 1 μF; unless otherwise specified.)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
TJ = +25°C
-5.75
-6.00
-6.25
Output Voltage
IO = 5 mA to 1 A, PO ≤ 15 W,
VI = -9 V to -21 V
-5.70
-6.00
-6.30
ΔVO
Line Regulation(4)
TJ = +25°C
VI = -8 V to -25 V
10
120
VI = -9 V to -13 V
5
60
ΔVO
Load Regulation(4)
TJ = +25°C, IO = 5 mA to 1.5 A
10
120
TJ = +25°C, IO = 250 mA to 750 mA
3
60
IQ
Quiescent Current
TJ = +25°C
3
6
ΔIQ
Quiescent Current
Change
IO = 5 mA to 1 A
0.05
0.50
VI = -8 V to -25 V
0.10
1.30
IO = 5 mA
-0.5
mV/°C
130
μV
60
dB
2
V
VO
ΔVo/ΔT
Temperature Coefficient
of VD
V
mV
mV
mA
mA
VN
Output Noise Voltage
f = 10 Hz to 100 kHz, TA =+25°C
RR
Ripple Rejection
f = 120 Hz, ΔVI = 10 V
VD
Dropout Voltage
TJ = +25°C, IO = 1 A
ISC
Short-Circuit Current
TJ = +25°C, VI = -35 V
300
mA
IPK
Peak Current
TJ = +25°C
2.2
A
54
Note:
4. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
4
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7906)
(VI = -14 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO =1 μF; unless otherwise specified.)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
TJ = +25°C
-7.7
-8.0
-8.3
Output Voltage
IO = 5 mA to 1 A, PO ≤ 15 W,
VI = -10 V to -23 V
-7.6
-8.0
-8.4
ΔVO
Line Regulation(5)
TJ = +25°C
VI = -10.5 V to -25 V
10
160
VI = -11 V to -17 V
5
80
ΔVO
Load Regulation(5)
TJ = +25°C, IO = 5 mA to 1.5 A
12
160
TJ = +25°C, IO = 250 mA to 750 mA
4
80
IQ
Quiescent Current
TJ = +25°C
3
6
ΔIQ
Quiescent Current
Change
IO = 5 mA to 1 A
0.05
0.50
VI = -10.5 V to -25 V
0.10
1.00
IO = 5 mA
-0.6
mV/°C
175
μV
60
dB
2
V
VO
ΔVo/ΔT
Temperature Coefficient
of VD
V
mV
mV
mA
mA
VN
Output Noise Voltage
f = 10 Hz to 100 kHz, TA = +25°C
RR
Ripple Rejection
f = 120 Hz, ΔVI = 10 V
VD
Dropout Voltage
TJ = +25°C, IO = 1 A
ISC
Short-Circuit Current
TJ = +25°C, VI = -35 V
300
mA
IPK
Peak Current
TJ = +25°C
2.2
A
54
Note:
5. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
5
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7908 / LM7908)
(VI = -15 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO =1 μF; unless otherwise specified.)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
TJ = +25°C
-8.7
-9.0
-9.3
Output Voltage
IO = 5 mA to 1 A, PO ≤ 15 W,
VI = -1.5 V to -23 V
-8.6
-9.0
-9.4
ΔVO
Line Regulation(6)
TJ = +25°C
VI = -11.5 V to -26 V
10
180
VI = -12 V to -18 V
5
90
ΔVO
Load Regulation(6)
TJ = +25°C, IO = 5 mA to 1.5 A
12
180
TJ = +25°C, IO = 250 mA to 750 mA
4
90
IQ
Quiescent Current
TJ = +25°C
3
6
ΔIQ
Quiescent Current
Change
IO = 5 mA to 1 A
0.05
0.50
VI = -11.5 V to -26 V
0.10
1.00
Temperature Coefficient
of VD
IO = 5 mA
-0.6
mV/°C
175
μV
60
dB
2
V
VO
ΔVo/ΔT
V
mV
mV
mA
mA
VN
Output Noise Voltage
f = 10 Hz to 100 kHz, TA = +25°C
RR
Ripple Rejection
f = 120 Hz, ΔVI = 10 V
VD
Dropout Voltage
TJ = +25°C, IO = 1 A
ISC
Short-Circuit Current
TJ = +25°C, VI = -35 V
300
mA
IPK
Peak Current
TJ = +25°C
2.2
A
54
Note:
6. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
6
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7909 / LM7909)
(VI = -17 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO =1 μF; unless otherwise specified.)
Symbol
VO
ΔVO
ΔVO
IQ
ΔIQ
ΔVo/ΔT
VN
Parameter
Conditions
Min.
Typ.
Max.
TJ = +25°C
-9.6
-10.0
-10.4
Output Voltage
IO = 5 mA to 1A, Pd ≤ 15 W,
VI = -12 V to -28 V
-9.5
-10.0
-10.5
Line Regulation(7)
TJ = +25°C
VI = -12.5 V to -28 V
12
200
VI = -14 V to -20 V
6
100
TJ = +25°C,
IO = 5 mA to 1.5 A
12
200
TJ = +25°C,
IO = 250 mA to 750 mA
4
Load Regulation(7)
TJ = +25°C
3
6
Quiescent Current
Change
0.05
0.50
VI = -12.5 V to -28 V
0.10
1.00
Output Noise Voltage
10 Hz ≤ f ≤ 100 kHz, TA = +25°C
mV
100
IO = 5 mA to 1 A
IO = 5 mA
V
mV
Quiescent Current
Temperature Coefficient
of VO
Unit
mA
mA
-1
mV/°C
280
μV
60
dB
2
V
RR
Ripple Rejection
f = 120 Hz, ΔVI = 10 V
VD
Dropout Voltage
TJ = +25°C, IO = 1 A
ISC
Short-Circuit Current
TJ = +25°C, VI = -35 V
300
mA
IPK
Peak Current
TJ = +25°C
2.2
A
54
Note:
7. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
7
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (LM7910)
(VI = -19 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO = 1 μF; unless otherwise specified.)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
TJ = +25°C
-11.5
-12.0
-12.5
Output Voltage
IO = 5 mA to 1 A, PO ≤ 15 W
VI = -15.5 V to -27 V
-11.4
-12.0
-12.6
ΔVO
Line Regulation(8)
TJ = +25°C
ΔVO
Load Regulation(8)
IQ
ΔIQ
VO
ΔVo/ΔT
Unit
V
VI = -14.5 V to -30 V
12
240
VI = -16 V to -22 V
6
120
TJ = +25°C, IO = 5 mA to 1.5 A
12
240
TJ = +25°C, IO = 250 mA to 750 mA
4
120
Quiescent Current
TJ = +25°C
3
6
Quiescent Current
Change
IO = 5 mA to 1 A
0.05
0.50
VI = -14.5 V to -30 V
0.10
1.00
IO = 5 mA
-0.8
mV/°C
200
μV
60
dB
2
V
Temperature Coefficient
of VD
mV
mV
mA
mA
VN
Output Noise Voltage
f = 10 Hz to 100 kHz, TA = +25°C
RR
Ripple Rejection
f = 120 Hz, ΔVI = 10 V
VD
Dropout Voltage
TJ = +25°C, IO = 1 A
ISC
Short-Circuit Current
TJ = +25°C, VI = -35 V
300
mA
IPK
Peak Current
TJ = +25°C
2.2
A
54
Note:
8. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
8
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7912 / LM7912)
(VI = -23 V, IO = 500 mA, 0°C ≤TJ ≤ +125°C, CI = 2.2 μF, CO = 1 μF; unless otherwise specified.)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
TJ = +25°C
-14.40
-15.00
-15.60
Output Voltage
IO = 5 mA to 1 A, PO ≤ 15 W
VI = -18 V to -30 V
-14.25
-15.00
-15.75
ΔVO
Line Regulation(9)
TJ = +25°C
VI = -17.5 V to -30 V
12
300
VI = -20 V to -26 V
6
150
ΔVO
Load Regulation(9)
TJ = +25°C, IO = 5 mA to 1.5 A
12
300
TJ = +25°C, IO = 250 mA to 750 mA
4
150
IQ
Quiescent Current
TJ = +25°C
3
6
ΔIQ
Quiescent Current
Change
IO = 5 mA to 1 A
0.05
0.50
VI = -17.5 V to -30 V
0.10
1.00
Temperature Coefficient
of VD
IO = 5 mA
-0.9
mV/°C
250
μV
60
dB
2
V
VO
ΔVo/ΔT
V
mV
mV
mA
mA
VN
Output Noise Voltage
f = 10 Hz to 100 kHz, TA = +25°C
RR
Ripple Rejection
f = 120 Hz, ΔVI = 10 V
VD
Dropout Voltage
TJ = +25°C, IO = 1 A
ISC
Short-Circuit Current
TJ = +25°C, VI = -35 V
300
mA
IPK
Peak Current
TJ = +25°C
2.2
A
54
Note:
9. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
9
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7915 / LM7915)
(VI = -27 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO =1 μF, unless otherwise specified.)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
TJ = +25°C
-17.3
-18.0
-18.7
Output Voltage
IO = 5 mA to 1 A, PO ≤ 15 W
VI = -22.5 V to -33 V
-17.1
-18.0
-18.9
ΔVO
Line Regulation(10)
TJ = +25°C
VI = -21 V to -33 V
15
360
VI = -24 V to -30 V
8
180
ΔVO
Load Regulation(10)
TJ = +25°C, IO = 5 mA to 1.5 A
15
360
TJ = +25°C, IO = 250 mA to 750 mA
5
180
IQ
Quiescent Current
TJ = +25°C
3
6
ΔIQ
Quiescent Current
Change
IO = 5 mA to 1 A
0.05
0.50
VI = -21 V to -33 V
0.10
1.00
VO
ΔVo/ΔT
Temperature Coefficient
of VD
IO = 5 mA
Unit
V
mV
mV
mA
mA
-1
mV/°C
300
μV
60
dB
2
V
VN
Output Noise Voltage
f = 10 Hz to 100 kHz, TA = +25°C
RR
Ripple Rejection
f = 120 Hz, ΔVI = 10 V
VD
Dropout Voltage
TJ = +25°C, IO = 1 A
ISC
Short-Circuit Current
TJ = +25°C, VI = -35 V
300
mA
IPK
Peak Current
TJ = +25°C
2.2
A
54
Note:
10. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
10
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7918 / LM7918)
(VI = -33 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO = 1 μF; unless otherwise specified.)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
TJ = +25°C
-23.0
-24.0
-25.0
Output Voltage
IO = 5 mA to 1 A, PO ≤ 15 W,
VI = -27 V to -38 V
-22.8
-24.0
-25.2
ΔVO
Line Regulation(11)
TJ = +25°C
ΔVO
Load Regulation(11)
IQ
ΔIQ
VO
ΔVo/ΔT
VI = -27 V to -38 V
15
480
VI = -30 V to -36 V
8
180
TJ = +25°C, IO = 5 mA to 1.5 A
15
480
TJ = +25°C, IO = 250 mA to 750 mA
5
240
Quiescent Current
TJ = +25°C
3
6
Quiescent Current
Change
IO = 5 mA to 1 A
0.05
0.50
VI = -27 V to -38 V
0.10
1.00
Temperature Coefficient
of VD
IO = 5 mA
Unit
V
mV
mV
mA
mA
-1
mV/°C
400
μV
60
dB
2
V
VN
Output Noise Voltage
f = 10 Hz to 100 kHz, TA = +25°C
RR
Ripple Rejection
f = 120 Hz, ΔVI = 10 V
VD
Dropout Voltage
TJ = +25°C, IO = 1 A
ISC
Short-Circuit Current
TJ = +25°C, VI = -35 V
300
mA
IPK
Peak Current
TJ = +25°C
2.2
A
54
Note:
11. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
11
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7924)
(VI = -19 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO =1 μF; unless otherwise specified.)
Symbol
VO
Parameter
Output Voltage
Conditions
Min.
Typ.
Max.
TJ = +25°C
-11.75
-12.00
-12.25
IO = 5 mA to 1 A, PO ≤ 15 W,
VI = -15.5 V to -27 V
-11.50
-12.00
-12.50
VI = -14.5 V to -27 V,
Io = 1 A
12
120
VI= -16 V to -22 V,
Io = 1 A
6
60
VI = -14.8 V to -30 V
12
120
VI = -16 V to -22 V, Io = 1 A
12
120
TJ = +25°C, IO = 5 mA to 1.5 A
12
150
TJ = +25°C, IO = 250 mA to 750 mA
4
75
3
6
TJ = +25°C
ΔVO
Line Regulation(12)
Unit
V
mV
ΔVO
Load Regulation(12)
IQ
Quiescent Current
TJ = +25°C
ΔIQ
Quiescent Current
Change
IO = 5 mA to 1 A
0.05
0.50
VI = -15 V to -30 V
0.10
1.00
Temperature Coefficient
of VD
IO = 5 mA
-0.8
mV/°C
VN
Output Noise Voltage
f = 10 Hz to 100 kHz, TA = +25°C
200
μV
RR
Ripple Rejection
f = 120 Hz, ΔVI = 10 V
60
dB
ΔVo/ΔT
54
mV
mA
mA
VD
Dropout Voltage
TJ = +25°C, IO = 1 A
2
V
ISC
Short-Circuit Current
TJ = +25°C, VI = -35 V
300
mA
IPK
Peak Current
TJ = +25°C
2.2
A
Note:
12. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
12
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7912A)
(VI = -23 V, IO = 500 mA, 0°C ≤ TJ ≤ +125°C, CI = 2.2 μF, CO = 1 μF; unless otherwise specified.)
Symbol
VO
Parameter
Output Voltage
Conditions
Min.
Typ.
Max.
TJ = +25°C
-14.7
-15.0
-15.3
IO = 5 mA to 1 A, PO ≤ 15 W,
VI = -18 V to -30 V
-14.4
-15.0
-15.6
VI = -17.5 V to -30 V,
Io = 1 A
12
150
VI = -20 V to -26 V,
Io = 1 A
6
75
VI = -17.9 V to -30 V
12
150
VI = -20 V to -26 V, Io = 1 A
6
150
TJ = +25°C
ΔVO
Line Regulation(13)
Unit
V
mV
TJ = +25°C, IO = 5 mA to 1.5 A
12
150
TJ = +25°C, IO = 250 mA to 750 mA
4
75
Quiescent Current
TJ = +25°C
3
6
Quiescent Current
Change
IO = 5 mA to 1 A
0.05
0.50
VI = -18.5 V to -30 V
0.10
1.00
Temperature Coefficient
of VD
IO = 5 mA
-0.9
mV/°C
VN
Output Noise Voltage
f = 10 Hz to 100 kHz, TA = +25°C
250
μV
RR
Ripple Rejection
f = 120 Hz, ΔVI = 10 V
60
dB
ΔVO
Load Regulation(13)
IQ
ΔIQ
ΔVo/ΔT
54
mV
mA
mA
VD
Dropout Voltage
TJ = +25°C, IO = 1 A
2
V
ISC
Short-Circuit Current
TJ = +25°C, VI = -35 V
300
mA
IPK
Peak Current
TJ = +25°C
2.2
A
Note:
13. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
13
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Electrical Characteristics (KA7915A)
15
Vin=10V
Io=40mA
Ou 5.05
tp
5
ut
Vo
lta 4.95
ge
[- 4.9
V]
Load Regulation[mV]
Output Voltage[-V]
5.1
Vin=25V
Io=100mA
4.85
4.8
-40
-25
0
25
50
75
100
Io=0.75A
-1
-3
-5
25
125
Io=1.5A
Lo 13
ad 11
Re 9
gul 7
ati 5
on 3
[m
1
V]
-40
TA, Ambient Temperature [ oC]
0
25
50
75
100
125
TA, Ambient Temperature [ oC]
Figure 2. Output Voltage
Figure 3. Load Regulation
4
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
V l
[V]
Dropout Voltage [V]
3.5
D
Quiescent Current [mA]
-25
3
2.5
2
1.5
Io=1A
1
0.5
0
-40
-25
0
25
50
75
100
TA, Ambient Temperature [oC]
125
5
Figure 4. Quiescent Current
-40
-25
0
25
50
75
100
125
TA, Ambient Temperature [oC]
Figure 5. Dropout Voltage
Short Circuit Current[A]
0.6
0.55
Sh 0.5
ort 0.45
Cir 0.4
cui 0.35
0.3
t
0.25
Cu 0.2
rre 0.15
nt 0.1
[A] 0.05
0
-0.05
-0.1
-40
-25
0
25
50
75
100
TA, Ambient Temperature [ oC]
125
Figure 6. Short-Circuit Current
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
14
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Typical Performance Characteristics
+
2.2 μF
+
1 μF
Co
CI
1
2
Input
3
KA79XX
LM79XX
Output
Figure 7. Negative Fixed Output Regulator
1
+15 V
KA7812
LM7812
+
C1
3
Co +
2
0.33 μF
+12 V
1 μF
1N4001
*
GND
+ 2.2 μF
C1
1
2
-15 V
1 μF +
Co
KA7912
LM7912
3
1N4001
*
-12 V
Figure 8. Split Power Supply (±12 V / 1 A)
Notes:
14. To specify an output voltage, substitute voltage value for "XX".
15. CI is required if the regulator is located an appreciable distance from the power supply filter. For value given,
capacitor must be solid tantalum. If aluminium electronics are used, at least ten times the value shown should be
selected.
16. CO improves stability and transient response. If large capacitors are used, a high-current diode from input to
output (1N4001 or similar) should be introduced to protect the device from momentary input short circuit.
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
15
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Typical Applications
KA79XX / KA79XXA / LM79XX — 3-Terminal 1 A Negative Voltage Regulator
Physical Dimensions
Figure 9. TO-220, MOLDED, 3-LEAD, JEDEC VARIATION AB (ACTIVE)
© 2002 Fairchild Semiconductor Corporation
KA79XX / KA79XXA / LM79XX Rev. 1.1.1
www.fairchildsemi.com
16
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