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KA79MXX/LM79M05
3-Terminal 0.5A Negative Voltage Regulator
Features
Description
• No external components required
• Output current in excess of 0.5A
• Internal thermal overload
• Internal short circuit current limiting
• Output transistor safe area compensation
• Output voltages of -5V,-6V,-8V, -12V,-15V,-18V,-24V
The KA79MXX series and LM79M05 are of 3-Terminal medium
current negative voltage regulators are monolithic integrated
circuits designed as fixed voltage regulators. These regulators
employ internal current limiting, thermal shutdown and safe area
compensation
indestructible.
making
them
essentially
TO-220
1
D-PAK
1
1. GND 2. Input 3. Output
Schematic Diagram
Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
KA79MXX
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
Input Voltage(for VO = -5V to -18V)
(for VO = -24V)
VI
VI
-35
-40
V
V
Thermal Resistance Junction-Cases
RθJC
5
°C /W
Thermal Resistance Junction-Air
RθJA
65
°C /W
Operating Temperature Range
TOPR
0 ~ +125
°C
Storage Temperature Range
TSTG
-65 ~ +125
°C
Electrical Characteristics
(KA79M05/KA79M05R/LM79M05)
(Refer to test circuit, 0 °C ≤T J ≤ +125 °C, lO =350mA, VI =-10V,unless otherwise specified, CI =0.33∝F,CO=0.1∝F)
Parameter
Output Voltage
Symbol
VO
Min.
Typ.
Max.
TJ= +25 °C
Conditions
-4.8
-5
-5.2
IO = 5mA to 350mA
VI = -V7 to -25V
-4.75
-5
-5.25
VI= -7V to -25V
-
7.0
50
VI= -8V to -25V
-
2.0
30
-
30
100
mV
3. 0
6. 0
mA
-
0.4
Line Regulation (Note1)
ΔVO
TJ =+25°C
Load Regulation (Note1)
ΔVO
IO = 5mA to 500mA
TJ = +25 °C
Quiescent Current
IQ
Quiescent Current Change
ΔIQ
Output Voltage Drift
TJ= +25 °CIO = 5mA to 350mA
-
IO = 200mA
VI = -8V to -25V
--0
ΔVo/ΔTIO = 5mA
Output Noise Voltage
VN
f = 10Hz, 100KHz
TA = +25 °C
Ripple Rejection
RR
f = 120Hz
VJ= -8Vto -18V
Dropout Voltage
VD
Short Circuit Current
Peak Current
Note:
-4
.4
-0.2
Unit
V
mV
mA
-
mV/ °C
0- ∝V
54
60
-
dB
TJ =+25 °C, IO = 500mA
-
1.1
-
V
ISC
TJ= +25 °C, VI = -35V
-
140
-
mA
IPK
TJ= +25 °C
-
650
-
mA
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be
taken
into account separately. Pulse testing with low duty is used.
2
KA79MXX
Electrical Characteristics (KA79M06)
(Refer to test circuit, 0 °C ≤T J ≤ +125 °C, lO =350mA, VI = -11V,unless otherwise specified)
Parameter
Output Voltage
Symbol
VO
Conditions
Min.
Typ.
Max.
TJ= +25 °C
- 5.75
- 6.0
- 6.25
IO = 5mA to 350mA
VI = -8.0V to -25V
- 5.7
- 6.0
- 6.3
VI = -8Vto -25V
-
7.0
60
VI = -9V to -19V
-
2.0
40
-
30
120
mV
3
6
mA
Line Regulation (Note1)
ΔVO
TJ =+25°C
Load Regulation (Note1)
ΔVO
TJ= +25 °CIO = 5.0mA to 500mA
Quiescent Current
Quiescent Current Change
Output Voltage Drift
IQ
ΔIQ
Unit
V
TJ= +25 °C-
mV
IO = 5mA to 350mA
-
-
0.4
VI = -8V to -25V
-
-
0.4
mA
-
0.4
-
mV/ °C
54
60
-
dB
1.1
-
V
ΔVO/ΔTIO = 5mA
Output Noise Voltage
VN
f = 10Hz to 100KHz,TA = +25 °C-5
Ripple Rejection
RR
f = 120Hz,VI = -9V to -19V
0-∝V
Dropout Voltage
VD
IO = 500mA, TJ = +25 °C-
Short Circuit Current
ISC
VI = -35V, TJ = +25 °C
-
140
-
mA
Peak Current
IPK
TJ= +25 °C
-
650
-
mA
Note:
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be
taken
into account separately. Pulse testing with low duty is used.
3
KA79MXX
Electrical Characteristics (KA79M08/KA79M08R)
(Refer to test circuit, 0 °C ≤T J ≤ +125 °C, lO =350mA, VI = -14V,unless otherwise specified)
Parameter
Output Voltage
Symbol
VO
Conditions
Min.
Typ.
Max.
TJ= +25 °C
- 7.7
- 8.0
- 8.3
IO = 5mA to 350mA
VI = -10.5V to -25V
- 7.6
- 8.0
- 8.4
VI = -10.5V to -25V
-
7.0
80
VI = -11V to -21V
-
2.0
50
-
30
160
mV
3
6
mA
Line Regulation (Note1)
ΔVO
TJ =+25°C
Load Regulation (Note1)
ΔVO
TJ= +25 °CIO = 5.0mA to 500mA
Quiescent Current
IQ
Quiescent Current Change
ΔIQ
Output Voltage Drift
Unit
V
TJ= +25 °C-
mV
IO = 5mA to 350mA
-
-
0.4
VI = -8V to -25V
-
-
0.4
mA
-
-0.6
-
mV/ °C
54
59
-
dB
1.1
-
V
ΔVO/ΔTIO = 5mA
Output Noise Voltage
VN
f = 10Hz to 100KHz,TA = +25 °C-6
Ripple Rejection
RR
f = 120Hz,VI = -9V to -19V
Dropout Voltage
VD
IO = 500mA, TJ = +25 °C-
Short Circuit Current
ISC
VI = -35V, TJ = +25 °C
-
140
-
mA
Peak Current
IPK
TJ = +25 °C
-
650
-
mA
Note:
0-∝V
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be
taken
into account separately. Pulse testing with low duty is used.
4
KA79MXX
Electrical Characteristics (KA79M12)
(Refer to test circuit, 0 °C ≤T J ≤ +125 °C, lO =350mA, VI = -19V,unless otherwise specified)
Parameter
Output Voltage
Symbol
VO
Conditions
Min.
Typ.
Max.
TJ= +25 °C
-11.5
-12
-12.5
IO = 5mA to 350mA
VI = -14.5V to -30V
-11.4
-12
-12.6
VI = -14.5V to -30V
-
8.0
80
VI = -15V to -25V
-
3.0
50
-
30
240
mV
3
6
mA
Line Regulation (Note1)
ΔVO
TJ =+25°C
Load Regulation (Note1)
ΔVO
TJ= +25 °CIO = 5.0mA to 500mA
Quiescent Current
Quiescent Current Change
Output Voltage Drift
IQ
ΔIQ
Unit
V
TJ= +25 °C-
mV
IO = 5mA to 350mA
-
-
0.4
VI = -14.5V to -30V
-
-
0.4
mA
-
-0.8
-
mV/ °C
54
60
-
dB
1.1
-
V
ΔVO/ΔTIO = 5mA
Output Noise Voltage
VN
f = 10Hz to 100KHz,TA =+25 °C-7
Ripple Rejection
RR
f = 120Hz,VI = -15V to -25V
5-∝V
Dropout Voltage
VD
IO = 500mA, TJ = +25 °C-
Short Circuit Current
ISC
VI = -35V, TJ = +25 °C
-
140
-
mA
Peak Current
IPK
TJ= +25 °C
-
650
-
mA
Note:
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be
taken
into account separately. Pulse testing with low duty is used.
5
KA79MXX
Electrical Characteristics (KA79M15)
(Refer to test circuit, 0 °C ≤T J ≤ +125 °C, lO =350mA, VI = -23V,unless otherwise specified)
Parameter
Output Voltage
Symbol
VO
Conditions
Min.
Typ.
Max.
TJ= +25 °C
- 14.4
- 15
- 15.6
IO = 5mA to 350mA
VI = -17.5V to -30V
-14.25
- 15
-15.75
VI = -17.5Vto -30V
-
9.0
80
VI = -18V to -28V
-
5.0
50
-
30
240
mV
3
6
mA
Line Regulation (Note1)
ΔVO
TJ =+25°C
Load Regulation (Note1)
ΔVO
TJ= +25 °CIO = 5.0mA to 500mA
Quiescent Current
Quiescent Current Change
Output Voltage Drift
IQ
ΔIQ
TJ= +25 °C-
Unit
V
mV
IO = 5mA to 350mA
-
-
0.4
VI = -17.5V to -28V
-
-
0.4
mA
-
-1.0
-
mV/ °C
54
59
-
dB
1.1
-
V
ΔVO/ΔTIO = 5mA
Output Noise Voltage
VN
f = 10Hz to 100KHz,TA = +25 °C-9
Ripple Rejection
RR
f = 120Hz,VI = -18.5V to -28.5V
Dropout Voltage
VD
IO = 500mA, TJ = +25 °C-
Short Circuit Current
ISC
VI = -35V, TJ = +25 °C
-
140
-
mA
Peak Current
IPK
TJ= +25 °C
-
650
-
mA
Note:
0-∝V
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be
taken
into account separately. Pulse testing with low duty is used.
6
KA79MXX
Electrical Characteristics (KA79M18)
(Refer to test circuit, 0 °C ≤T J ≤ +125 °C, lO =350mA, VI = -27V,unless otherwise specified)
Parameter
Output Voltage
Symbol
VO
Conditions
Min.
Typ.
Max.
TJ= +25 °C
- 17.3
- 18
- 18.7
IO = 5mA to 350mA
VI = -21V to -33V
- 17.1
- 18
- 18.9
VI = -21V to -33V
-
9.0
80
VI = -24V to -30V
-
5.0
80
-
30
360
mV
3
6
mA
Line Regulation (Note1)
ΔVO
TJ =+25°C
Load Regulation (Note1)
ΔVO
TJ= +25 °CIO = 5.0mA to 500mA
Quiescent Current
Quiescent Current Change
Output Voltage Drift
IQ
ΔIQ
TJ= +25 °C-
Unit
V
mV
IO = 5mA to 350mA
-
-
0.4
VI = -21V to -33V
-
-
0.4
mA
-
-1.0
-
mV/ °C
54
59
-
dB
1.1
-
V
ΔVO/ΔTIO = 5mA
Output Noise Voltage
VN
f = 10Hz to 100KHz,TA = +25 °C-1
Ripple Rejection
RR
f = 120Hz,VI = -22V to -32V
Dropout Voltage
VD
IO = 500mA, TJ = +25 °C-
Short Circuit Current
ISC
VI = -35V, TJ = +25 °C
-
140
-
mA
Peak Current
IPK
TJ= +25 °C
-
650
-
mA
10-∝V
Note;
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be
taken
into account separately. Pulse testing with low duty is used.
7
KA79MXX
Electrical Characteristics (KA79M24)
(Refer to test circuit, 0 °C ≤T J ≤ +125 °C, lO =350mA, VI = -33V,unless otherwise specified)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
- 23
- 24
- 25
- 22.8
- 24
- 25.2
VI = -27V to -38V
-
9.0
80
VI = -30V to -36V
-
5.0
70
-
30
300
mV
3
6
mA
TJ= +25 °C
Output Voltage
VO
IO = 5mA to 350mA
VI = -27V to -38V
Line Regulation (Note1)
ΔVO
TJ =+25°C
Load Regulation (Note1)
ΔVO
TJ= +25 °CIO = 5.0mA to 500mA
Quiescent Current
IQ
Quiescent Current Change
ΔIQ
Output Voltage Drift
TJ= +25 °C-
Unit
V
mV
IO = 5mA to 350mA
-
-
0.4
VI = -27V to -38V
-
-
0.4
mA
-
-1.0
-
mV/ °C
-
180
-
∝V
54
58
-
dB
1.1
-
V
ΔVO/ΔTIO = 5mA
Output Noise Voltage
VN
f = 10Hz to 100KHz,TA = +25 °C
Ripple Rejection
RR
f = 120Hz,VI = -28V to -38V
Dropout Voltage
VD
IO = 500mA, TJ = +25 °C-
Short Circuit Current
ISC
VI = -35V, TJ = +25 °C
-
140
-
mA
Peak Current
IPK
TJ= +25 °C
-
650
-
mA
Note:
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be
taken
into account separately. Pulse testing with low duty is used.
8
KA79MXX
Typical Applications
Figure 1. Fixed Output Regulator
Figure 2. Variable Output
Notes:
1. Required for stability. For value given, capacitor must be solid tantalum. 25 ∝F aluminum electrolytic may be substituted.
2. C2 improves transient response and ripple rejection. Do not increase beyond 50∝F.
9
KA79MXX
Mechanical Dimensions
Package
Dimensions in millimeters
TO-220
4.50 ±0.20
2.80 ±0.10
(3.00)
1.30
+0.10
-0.05
18.95MAX.
(3.70)
ø3.60 ±0.10
15.90 ±0.20
1.30 ±0.10
(8.70)
(1.46)
9.20 ±0.20
(1.70)
9.90 ±0.20
1.52 ±0.10
0.80 ±0.10
2.54TYP
[2.54 ±0.20]
2.54TYP
[2.54 ±0.20]
10.00 ±0.20
10
10.08 ±0.30
(1.00)
13.08 ±0.20
(45°)
1.27 ±0.10
0.50
+0.10
-0.05
2.40 ±0.20
KA79MXX
Mechanical Dimensions
(Continued)
Package
Dimensions in millimeters
D-PAK
6.60 ±0.20
MIN0.55
0.91 ±0.10
0.89 ±0.10
9.50 ±0.30
6.10 ±0.20
2.70 ±0.20
0.50 ±0.10
0.76 ±0.10
0.50 ±0.10
1.02 ±0.20
2.30TYP
[2.30±0.20]
2.30 ±0.20
(1.00)
(0.90)
(5.04)
(1.50)
(0.70)
6.60 ±0.20
(5.34)
(0.10)(3.05)
(2XR0.25)
2.70 ±0.20
2.30TYP
[2.30±0.20]
(0.50)
6.10 ±0.20
MAX0.96
(4.34)
9.50 ±0.30
0.80 ±0.20
0.60 ±0.20
(0.50)
2.30 ±0.10
0.70 ±0.20
5.34 ±0.30
0.76 ±0.10
11
KA79MXX
Ordering Information
Product Number
Package
Operating Temperature
KA79M05
KA79M06
KA79M08
KA79M12
TO-220
KA79M15
0 ~ + 125°C
KA79M18
KA79M24
LM79M05
KA79M05R
KA79M08R
KA79M12R
12
D-PAK
KA79MXX
13
KA79MXX
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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