KA79LXXA
FIXED VOLTAGE REGULATOR (NEGATIVE)
3-TERMINAL 0.1A NEGATIVE VOLTAGE
REGULATORS
T0-92
These regulators employ internal current limiting and thermal shutdown,
making them essentially indestructible.
FEATURES
•
•
•
•
Output current up to 100mA
No external components
Internal thermal over load protection
Internal short circuit current limiting
1: GND 2: Input 3: Output
ORDERING INFORMATION
SCHEMATIC DIAGRAM
Device
Package
KA79LXXAZ
TO - 92
Operating Temperature
&
0 ~ + 125
KA79LXXA
FIXED VOLTAGE REGULATOR (NEGATIVE)
ABSOLUTE MAXIMUM RATINGS (T A = 25&, unless otherwise specified)
Characteristic
Symbol
Value
Input Voltage (-5V)
Unit
-30
VI
(-12V to -18V)
(-24V)
-35
VDC
-40
&
&
Operating Temperature Range
T OPR
0 ~ + 125
Storage Temperature Range
T STG
-65 ~ + 150
KA79L05A ELECTRICAL CHARACTERISTICS
âF, C
(VI = -10V, IO = 40mA, CI = 0.33
Characteristic
O
âF, 0&T + 125&, unless otherwise specified)
= 0.1
Symbol
Output Voltage
VO
Line Regulation
ºV
ºV
O
Output Voltage
VO
Test Conditions
&
-7.0V V -20V
T =25&
-8V V -20V
1.0mAI 100mA
T =25&
1.0mAI 40mA
-7.0VyV y-20V, 1.0mAI 40mA
V = -10V, 1.0mAI 70mA
T = +25&
T = +125&
T J = +25
O
Load Regulation
J
IQ
Typ
Max
Unit
- 4.8
- 5.0
- 5.2
V
15
150
I
J
100
I
O
20
60
O
10
30
J
I
O
I
Quiescent Current
Min
O
- 4.75
- 5.25
- 4.75
- 5.25
2.0
J
Quiescent
With Line
Current Change
With Load
Output Noise Voltage
Ripple Rejection
ºI
Q
VN
RR
-8V
VI
TA
0.1
O
f = 120Hz, -8V
&
= +25&
VI
mV
V
mA
1.5
-20V
I 40mA
= 25&,10Hzf100KHz
1.0mA
6.0
5.5
J
mV
-18V
41
mA
30
âV
60
dB
1.7
V
T J = +25
Dropout Voltage
VD
TJ
e Load and line regulation are specified at constant junction temperature. Change in V
O
must be taken into account separately. Pulse testing with low duty is used.
due to heating effects
KA79LXXA
FIXED VOLTAGE REGULATOR (NEGATIVE)
KA79L12A ELECTRICAL CHARACTERISTICS
âF, C
(VI = -19V, IO = 40mA, CI = 0.33
Characteristic
O
âF, 0&T + 125&, unless otherwise specified)
= 0.1
Symbol
Output Voltage
Test Conditions
&
-14.5V V -27V
T =25&
-16V V -27V
1.0mAI 100mA
T =25&
1.0mAI 40mA
-14.5VyV y-27V, 1.0mAI 40mA
V = -19V, 1.0mAI 70mA
T = +25&
T = +125&
-16V V -27V
1.0mAI 40mA
T = 25&,10Hzf100KHz
f = 120Hz, -150V V -25V
T = +25&
T = +25&
VO
T J = +25
ºV
ºV
Line Regulation
J
O
Output Voltage
IQ
With Line
Current Change
With Load
Max
Unit
-11.5
-12.0
-12.5
V
250
ºI
200
O
100
O
50
I
O
I
Quiescent
Typ
I
J
VO
Quiescent Current
Min
I
O
Load Regulation
J
O
-11.4
-12.6
-11.4
-12.6
J
6.5
J
6.0
0.1
VN
Ripple Rejection
RR
A
I
V
mA
37
mA
80
âV
42
dB
O
Output Noise Voltage
mV
1.5
I
Q
mV
J
1.7
V
Dropout Voltage
VD
J
*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.
KA79L15A ELECTRICAL CHARACTERISTICS
âF, C
(VI = -23V, IO = 40mA, CI = 0.33
Characteristic
Output Voltage
O
âF, 0&T + 125&, unless otherwise specified)
= 0.1
Symbol
VO
O
O
Load Regulation
VO
Output Voltage
Test Conditions
&
-17.5V V -30V
T =25&
-27V V -30V
1.0mAI 100mA
T =25&
1.0mAI 40mA
-17.5VyV y-30V, 1.0mAI 40mA
V = -23V, 1.0mAI 70mA
T = +25&
T = +125&
-20V V -30V
1.0mAI 40mA
T = 25&,10Hzf100KHz
f = 120Hz, -18.5V V -28.5V
T = +25&
T = +25&
T J = +25
ºV
ºV
Line Regulation
J
IQ
Quiescent
With Line
Current Change
With Load
Output Noise Voltage
Ripple Rejection
ºI
Q
VN
RR
Typ
Max
Unit
-15.0
-15.6
V
300
I
J
250
I
O
150
O
75
J
I
I
Quiescent Current
Min
-14.4
O
O
-14.25
-15.75
-14.25
-15.75
J
6.5
J
6.0
mV
V
mA
1.5
I
0.1
A
34
mA
90
âV
39
dB
O
I
mV
J
1.7
V
Dropout Voltage
VD
J
*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.
KA79LXXA
FIXED VOLTAGE REGULATOR (NEGATIVE)
KA79L18A ELECTRICAL CHARACTERISTICS
âF, C
(VI = -27V, IO = 40mA, CI = 0.33
Characteristic
O
âF, 0&T + 125&, unless otherwise specified)
= 0.1
Symbol
Output Voltage
VO
IQ
With Line
Current Change
With Load
Unit
-17.3
-18.0
-18.7
V
325
275
O
170
O
85
J
O
I
Quiescent
Max
J
I
VO
Quiescent Current
Typ
I
O
Output Voltage
&
-20.7V V -33V
T =25&
-21V V -33V
1.0mAI 100mA
T =25&
1.0mAI 40mA
-20.7VyV y-33V, 1.0mAI 40mA
V = -1.0V, 1.0mAI 70mA
T = +25&
T = +125&
-21V V -33V
1.0mAI 40mA
T = 25&,10Hzf100KHz
f = 120Hz, -23V V -33V
T = +25&
T = +25&
Min
I
O
Load Regulation
Test Conditions
T J = +25
ºV
ºV
Line Regulation
J
ºI
O
-17.1
-18.9
-17.1
-18.9
J
6.5
J
6.0
1.5
I
Q
0.1
VN
Ripple Rejection
RR
A
I
33
mV
V
mA
mA
150
âV
48
dB
O
Output Noise Voltage
mV
J
1.7
V
Dropout Voltage
VD
J
*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.
KA79L24A ELECTRICAL CHARACTERISTICS
âF, C
(VI = -33V, IO = 40mA, CI = 0.33
Characteristic
Output Voltage
O
âF, 0&T + 125&, unless otherwise specified)
= 0.1
Symbol
VO
O
Load Regulation
O
Output Voltage
VO
Test Conditions
&
-27V V -38V
T =25&
-28V V -38V
1.0mAI 100mA
T =25&
1.0mAI 40mA
-27VyV y-38V, 1.0mAI 40mA
V = -33V, 1.0mAI 70mA
T = +25&
T = +125&
-28V V -38V
1.0mAI 40mA
T = 25&,10Hzf100KHz
f = 120Hz, -29V V -35V
T = +25&
T = +25&
T J = +25
ºV
ºV
Line Regulation
J
J
IQ
Quiescent
With Line
Current Change
With Load
Output Noise Voltage
Ripple Rejection
ºI
Q
Typ
Max
Unit
-23
-24
-25
V
I
350
I
300
200
O
J
100
O
I
O
I
Quiescent Current
Min
O
-22.8
-25.2
-22.8
-25.2
J
6.5
J
6.0
1.5
I
0.1
RR
A
I
31
mV
V
mA
mA
200
âV
47
dB
O
VN
mV
J
1.7
V
Dropout Voltage
VD
J
*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.
KA79LXXA
FIXED VOLTAGE REGULATOR (NEGATIVE)
TYPICAL APPLICATIONS
Design Considerations
The KA79LXXA Series of fixed voltage regulators
are designed with Thermal Overload Protection that
shuts down the circuit when subjected to an excessive
power overload condition. Internal Short-Circuit
Protection that limits the maximum current the circuit
will pass.
In many low current applications, compensation
capacitors are not required. However, it is
recommended that the regulator input be bypassed
with a capacitor if the regulator is connected to the
power supply filter with long wire lengths, or if the
output load capacitance is large. An input bypass
capacitor should be selected to provide good high frequency characteristics to insure stable operation
under all load conditions. A 0.33 F or larger tantalum,
mylar, or other capacitor having low internal
impedance at high frequencies should be chosen. The
bypass capacitor should be mounted with the shortest
possible leads directly across the regulator's input
terminals. Normally good construction techniques
should be used to minimize ground loops and lead
resistance drops since the regulator has no external
sense lead. Bypassing the output is also
recommended.
Fig. 1 POSITIVE AND NEGATIVE
REGULATOR
Fig. 2 TYPICAL APPLICATION
â
OUTPUT
A common ground is required between the Input
and the output voltages. The input voltage must
remain typically 2.0V above the output voltage even
during the low point on the input ripple voltage.
e= C
is required
if regulator is located an
1
appreciable distance from power supply filter.
* * = CO improves stability and transient response.