79L05.PDF

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NEGATIVE VOLTAGE REGULATORS
L79L00
SERIES
. OUTPUT CURRENT UP TO 100 mA
NEGATIVE VOLTAGE REGULATORS
. OUTPUT VOLTAGES OF -5; -6; -8; -9; -12; -15V
. NO EXTERNAL COMPONENTS ARE RE-
. AVAILABLE IN EITHER ± 5% ( AC ) OR ± 10% (C)
SELECTION
QUIRED
DESCRIPTION
The L79L00 series of three-terminal negative
regulators employ internal current limiting and ther-
mal shutdown, making them essentially indestruc-
tible. If adequate heatsink is provided, they can
deliver up to 100 mA output current. They are in-
tended as fixed voltage regulators in a wide range
of applications including local or on-card regulation
for elimination of noise and distribution problems as-
sociated with single-point regulation. In addition,
they can be used with power pass elements to make
high-current voltage regulators.
The L79L00 series used as Zener diode/resistor
combination replacement, offers an effective output
impedance improvement of typically two orders of
magnetude, along with lower quiescent current and
lower noise.
SO-8
TO-92
SCHEMATIC DIAGRAM
April 1994
1/12
. THERMAL OVERLOAD PROTECTION
. SHORT CIRCUIT PROTECTION
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L79L00 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V i
DC Input Voltage
V o = -5 V to -9 V
-30
V
V o = -12 V to -15 V
-35
V
I o
Output Current
100
mA
P tot
Power Dissipation
Internally limited (*)
T stg
Storage Temperature Range
- 40 to 150
o C
o C
o C
(*) Our SO-8 package used for Voltage Regulators is modified internally to have pins 2, 3, 6 and 7 electrically commoned to
the die attach flag. This particular frame decreases the total thermal resistance of the package and increases its ability to dis-
sipate power when an appropriate area of copper on the printed circuit board is available for heatsinking. The external dimen-
sions are the same as for the standard SO-8
Operating Junction Temperature Range
For L79L00C, L79L00AC
For L79L00AB
0 to 125
- 40 to 125
TEST CIRCUITS
2/12
T op
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L79L00 SERIES
CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)
BOTTOM VIEW
pin 1 = GND
pin 2 = IN
pin 3 = OUT
SO-8
TO-92
ORDERING NUMBERS
Type
SO-8
TO-92
Output Voltage
L79L05C
L79L05AC
L79L05AB
L79L06C
L79L06AC
L79L06AB
L79L08C
L79L08AC
L79L08AB
L79L09C
L79L09AC
L79L09AB
L79L12C
L79L12AC
L79L12AB
L79L15C
L79L15AC
L79L15AB
L79L05CD
L79L05ACD
L79L05ABD
L79L06CD
L79L06ACD
L79L06ABD
L79L08CD
L79L08ACD
L79L08ABD
L79L09CD
L79L09ACD
L79L09ABD
L79L12CD
L79L12ACD
L79L12ABD
L79L15CD
L79L15ACD
L79L15ABD
L79L05CZ
L79L05ACZ
L79L05ABZ
L79L06CZ
L79L06ACZ
L79L06ABZ
L79L08CZ
L79L08ACZ
L79L08ABZ
L79L09CZ
L79L09ACZ
L79L09ABZ
L79L12CZ
L79L12ACZ
L79L12ABZ
L79L15CZ
L79L15ACZ
L79L15ABZ
-5 V
-5 V
-5 V
-6 V
-6 V
-6 V
-8 V
-8 V
-8 V
-9 V
-9 V
-9 V
-12 V
-12 V
-12 V
-15 V
-15 V
-15 V
3/12
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L79L00 SERIES
ELECTRICAL CHARACTERISTICS FOR L79L05 (refer to the test circuits, T j = 0 to 125 o C,
V i = -10V, I o = 40 mA, C i = 0.33
m
F, C o = 0.1
m
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V o
Output Voltage
T j = 25 o C
-4.6
-5
-5.4
V
V o
Output Voltage
I o = 1 to 40 mA V i = -7 to -20 V
I o = 1 to 70 mA V i = -10 V
-4.5
-4.5
-5.5
-5.5
V
V
D
V o Line Regulation
V i = -7 to -20 V T j = 25 o C
V i = -8 to -20 V T j = 25 o C
200
150
mV
mV
D
V o Load Regulation
I o = 1 to 100 mA T j = 25 o C
I o = 1 to 40 mA T j = 25 o C
60
30
mV
mV
I d
Quiescent Current
T j = 25 o C
T j = 125 o C
6
5.5
mA
mA
D
I d
Quiescent Current Change
I o = 1 to 40 mA
0.2
mA
D
I d
Quiescent Current Change
V i = -8 to -20 V
1.5
mA
eN
Output Noise Voltage
B = 10Hz to 100KHz T j = 25 o C
40
m
V
SVR Supply Voltage Rejection
I o = 40 mA f = 120 Hz T j = 25 o C
V i = -8 to -18 V
40
49
dB
V d
Dropout Voltage
1.7
V
ELECTRICAL CHARACTERISTICS FOR L79L06 (refer to the test circuits, T j = 0 to 125 o C,
V i = -12V, I o = 40 mA, C i = 0.33
m
F, C o = 0.1
m
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V o
Output Voltage
T j = 25 o C
-5.52
-6
-6.48
V
V o
Output Voltage
I o = 1 to 40 mA V i = -8.5 to -20 V
I o = 1 to 70 mA V i = -12 V
-5.4
-5.4
-6.6
-6.6
V
V
D
V o Line Regulation
V i = -8.5 to -20 V T j = 25 o C
V i = -9 to -20 V T j = 25 o C
200
150
mV
mV
D
V o Load Regulation
I o = 1 to 100 mA T j = 25 o C
I o = 1 to 40 mA T j = 25 o C
60
30
mV
mV
I d
Quiescent Current
T j = 25 o C
T j = 125 o C
6
5.5
mA
mA
D
I d
Quiescent Current Change
I o = 1 to 40 mA
0.2
mA
D
I d
Quiescent Current Change
V i = -8 to -20 V
1.5
mA
eN
Output Noise Voltage
B = 10Hz to 100KHz T j = 25 o C
50
m
V
SVR Supply Voltage Rejection
I o = 40 mA f = 120 Hz T j = 25 o C
V i = -9 to -20 V
38
46
dB
V d
Dropout Voltage
1.7
V
4/12
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L79L00 SERIES
ELECTRICAL CHARACTERISTICS FOR L79L08 (refer to the test circuits, T j = 0 to 125 o C,
V i = -14V, I o = 40 mA, C i = 0.33
m
F, C o = 0.1
m
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V o
Output Voltage
T j = 25 o C
-7.36
-8
-8.64
V
V o
Output Voltage
I o = 1 to 40 mA V i = -10.5 to -23 V
I o = 1 to 70 mA V i = -14 V
-7.2
-7.2
-8.8
-8.8
V
V
D
V o Line Regulation
V i = -10.5 to -23 V T j = 25 o C
V i = -11 to -23 V T j = 25 o C
200
150
mV
mV
D
V o Load Regulation
I o = 1 to 100 mA T j = 25 o C
I o = 1 to 40 mA T j = 25 o C
80
40
mV
mV
I d
Quiescent Current
T j = 25 o C
T j = 125 o C
6
5.5
mA
mA
D
I d
Quiescent Current Change
I o = 1 to 40 mA
0.2
mA
D
I d
Quiescent Current Change
V i = -11 to -23 V
1.5
mA
eN
Output Noise Voltage
B = 10Hz to 100KHz T j = 25 o C
60
m
V
SVR Supply Voltage Rejection
I o = 40 mA f = 120 Hz T j = 25 o C
V i = -12 to -23 V
36
45
dB
V d
Dropout Voltage
1.7
V
ELECTRICAL CHARACTERISTICS FOR L79L09 (refer to the test circuits, T j = 0 to 125 o C,
V i = -15V, I o = 40 mA, C i = 0.33
m
F, C o = 0.1
m
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V o
Output Voltage
T j = 25 o C
-8.28
-9
-9.72
V
V o
Output Voltage
I o = 1 to 40 mA V i = -11.5 to -23 V
I o = 1 to 70 mA V i = -15 V
-8.1
-8.1
-9.9
-9.9
V
V
D
V o Line Regulation
V i = -11.5 to -23 V T j = 25 o C
V i = -12 to -23 V T j = 25 o C
250
200
mV
mV
D
V o Load Regulation
I o = 1 to 100 mA T j = 25 o C
I o = 1 to 40 mA T j = 25 o C
80
40
mV
mV
I d
Quiescent Current
T j = 25 o C
T j = 125 o C
6
5.5
mA
mA
D
I d
Quiescent Current Change
I o = 1 to 40 mA
0.2
mA
D
I d
Quiescent Current Change
V i = -12 to -23 V
1.5
mA
eN
Output Noise Voltage
B = 10Hz to 100KHz T j = 25 o C
70
m
V
SVR Supply Voltage Rejection
I o = 40 mA f = 120 Hz T j = 25 o C
V i = -12 to -23 V
36
44
dB
V d
Dropout Voltage
1.7
V
5/12
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