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Электронный компонент: L7900A

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1/15
January 2003
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OUTPUT CURRENT TO 1.5A
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OUTPUT VOLTAGES OF -5; -5.2; -6; -8; -12;
-15; -18; -20; -22; -24V
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THERMAL OVERLOAD PROTECTION
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SHORT CIRCUIT PROTECTION
s
OUTPUT TRANSITION SOA PROTECTION
DESCRIPTION
The L7900AC series of three-terminal negative
regulators is available in TO-220 and D
2
PAK
packages and several fixed output voltages.
These regulators can provide local on-card
regulation, eliminating the distribution problems
associated
with
single
point
regulation;
furthermore, having the same voltage option as
the L7800A positive standard series, they are
particularly suited for split power supplies. In
addition, the -5.2V is also available for ECL
system. If adequate heat sinking is provided, they
can deliver over 1.5A output current.
Although designed primarily as fixed voltage
regulators, these devices can be used with
external components to obtain adjustable voltages
and currents.
L7900AC
SERIES
2% NEGATIVE VOLTAGE REGULATORS
SCHEMATIC DIAGRAM
TO-220
D
2
PAK
L7900AC SERIES
2/15
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
THERMAL DATA
CONNECTION DIAGRAM (top view)
ORDERING CODES
(*) Available in Tape & Reel with the suffix "-TR".
Symbol
Parameter
Value
Unit
V
I
DC Input Voltage
for V
O
= -5 to -18V
-35
V
for V
O
= -20, -24V
-40
I
O
Output Current
Internally Limited
P
tot
Power Dissipation
Internally Limited
T
stg
Storage Temperature Range
-65 to 150
C
T
op
Operating Junction Temperature Range
0 to 125
C
Symbol
Parameter
D
2
PAK
TO-220
Unit
R
thj-case
Thermal Resistance Junction-case
Max
3
3
C/W
R
thj-amb
Thermal Resistance Junction-ambient
Max
62.5
50
C/W
TYPE
TO-220
D
2
PAK (*)
OUTPUT VOLTAGE
L7905AC
L7905ACV
L7905ACD2T
-5 V
L7952AC
L7952ACV
L7952ACD2T
-5.2 V
L7906AC
L7906ACV
L7906ACD2T
-6 V
L7908AC
L7908ACV
L7908ACD2T
-8 V
L7912AC
L7912ACV
L7912ACD2T
-12 V
L7915AC
L7915ACV
L7915ACD2T
-15 V
L7918AC
L7918ACV
L7918ACD2T
-18 V
L7920AC
L7920ACV
L7920ACD2T
-20 V
L7922AC
L7922ACV
L7922ACD2T
-22 V
L7924AC
L7924ACV
L7924ACD2T
-24 V
TO-220
D
2
PAK
L7900AC SERIES
3/15
APPLICATION CIRCUITS
ELECTRICAL CHARACTERISTICS OF L7905A (refer to the test circuits, T
J
= 0 to 125C, V
I
= -10V,
I
O
= 500 mA, C
I
= 2.2 F, C
O
= 1 F unless otherwise specified).
(*) Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= 25C
-4.9
-5
-5.1
V
V
O
Output Voltage
I
O
= -5 mA to -1 A
P
O
15W
V
I
= 8 to 20 V
-4.8
-5
-5.2
V
V
O
(*)
Line Regulation
V
I
= -7 to -25 V
T
J
= 25C
100
mV
V
I
= -8 to -12 V
T
J
= 25C
50
V
O
(*)
Load Regulation
I
O
= 5 mA to 1.5 A
T
J
= 25C
100
mV
I
O
= 250 to 750 mA
T
J
= 25C
50
I
d
Quiescent Current
T
J
= 25C
3
mA
I
d
Quiescent Current Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= -8 to -25 V
1.3
V
O
/
T Output Voltage Drift
I
O
= 5 mA
-0.4
mV/C
eN
Output Noise Voltage
B = 10Hz to 100KHz
T
J
= 25C
100
V
SVR
Supply Voltage Rejection
V
I
= 10 V
f = 120Hz
54
60
dB
V
d
Dropout Voltage
I
O
= 1 A
T
J
= 25C
V
O
= 100 mV
1.4
V
I
sc
Short Circuit Current
2.1
A
I
scp
Short Circuit Peak Current
T
J
= 25C
2.5
A
L7900AC SERIES
4/15
ELECTRICAL CHARACTERISTICS OF L7952A (refer to the test circuits, T
J
= 0 to 125C, V
I
= -10V,
I
O
= 500 mA, C
I
= 2.2 F, C
O
= 1 F unless otherwise specified).
(*) Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS OF L7906A (refer to the test circuits, T
J
= 0 to 125C, V
I
= -11V,
I
O
= 500 mA, C
I
= 2.2 F, C
O
= 1 F unless otherwise specified).
(*) Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= 25C
-5.1
-5.2
-5.3
V
V
O
Output Voltage
I
O
= -5 mA to -1 A
P
O
15W
V
I
= -9 to -21 V
-5
-5.2
-5.4
V
V
O
(*)
Line Regulation
V
I
= -8 to -25 V
T
J
= 25C
105
mV
V
I
= -9 to -13 V
T
J
= 25C
52
V
O
(*)
Load Regulation
I
O
= 5 mA to 1.5 A
T
J
= 25C
105
mV
I
O
= 250 to 750 mA
T
J
= 25C
52
I
d
Quiescent Current
T
J
= 25C
3
mA
I
d
Quiescent Current Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= -9 to -25 V
1.3
V
O
/
T Output Voltage Drift
I
O
= 5 mA
-0.5
mV/C
eN
Output Noise Voltage
B = 10Hz to 100KHz
T
J
= 25C
125
V
SVR
Supply Voltage Rejection
V
I
= 10 V
f = 120Hz
54
60
dB
V
d
Dropout Voltage
I
O
= 1 A
T
J
= 25C
V
O
= 100 mV
1.4
V
I
sc
Short Circuit Current
2.1
A
I
scp
Short Circuit Peak Current
T
J
= 25C
2.5
A
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= 25C
-5.88
-6
-6.12
V
V
O
Output Voltage
I
O
= -5 mA to -1 A
P
O
15W
V
I
= -9.5 to -21.5 V
-5.76
-6
-6.24
V
V
O
(*)
Line Regulation
V
I
= -8.5 to -25 V
T
J
= 25C
120
mV
V
I
= -9 to -15 V
T
J
= 25C
60
V
O
(*)
Load Regulation
I
O
= 5 mA to 1.5 A
T
J
= 25C
120
mV
I
O
= 250 to 750 mA
T
J
= 25C
60
I
d
Quiescent Current
T
J
= 25C
3
mA
I
d
Quiescent Current Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= -9.5 to -25 V
1.3
V
O
/
T Output Voltage Drift
I
O
= 5 mA
-0.6
mV/C
eN
Output Noise Voltage
B = 10Hz to 100KHz
T
J
= 25C
144
V
SVR
Supply Voltage Rejection
V
I
= 10 V
f = 120Hz
54
60
dB
V
d
Dropout Voltage
I
O
= 1 A
T
J
= 25C
V
O
= 100 mV
1.4
V
I
sc
Short Circuit Current
2
A
I
scp
Short Circuit Peak Current
T
J
= 25C
2.5
A
L7900AC SERIES
5/15
ELECTRICAL CHARACTERISTICS OF L7908A (refer to the test circuits, T
J
= 0 to 125C, V
I
= -14V,
I
O
= 500 mA, C
I
= 2.2 F, C
O
= 1 F unless otherwise specified).
(*) Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS OF L7912A (refer to the test circuits, T
J
= 0 to 125C, V
I
= -19V,
I
O
= 500 mA, C
I
= 2.2 F, C
O
= 1 F unless otherwise specified).
(*) Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= 25C
-7.84
-8
-8.16
V
V
O
Output Voltage
I
O
= -5 mA to -1 A
P
O
15W
V
I
= -11.5 to -23 V
-7.68
-8
-8.32
V
V
O
(*)
Line Regulation
V
I
= -10.5 to -25 V
T
J
= 25C
160
mV
V
I
= -11 to -17 V
T
J
= 25C
80
V
O
(*)
Load Regulation
I
O
= 5 mA to 1.5 A
T
J
= 25C
160
mV
I
O
= 250 to 750 mA
T
J
= 25C
80
I
d
Quiescent Current
T
J
= 25C
3
mA
I
d
Quiescent Current Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= -11.5 to -25 V
1
V
O
/
T Output Voltage Drift
I
O
= 5 mA
-0.6
mV/C
eN
Output Noise Voltage
B = 10Hz to 100KHz
T
J
= 25C
175
V
SVR
Supply Voltage Rejection
V
I
= 10 V
f = 120Hz
54
60
dB
V
d
Dropout Voltage
I
O
= 1 A
T
J
= 25C
V
O
= 100 mV
1.1
V
I
sc
Short Circuit Current
1.5
A
I
scp
Short Circuit Peak Current
T
J
= 25C
2.5
A
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
T
J
= 25C
-11.75
-12
-12.25
V
V
O
Output Voltage
I
O
= -5 mA to -1 A
P
O
15W
V
I
= -15.5 to -27 V
-11.5
-12
-12.5
V
V
O
(*)
Line Regulation
V
I
= -14.5 to -30 V
T
J
= 25C
240
mV
V
I
= -16 to -22 V
T
J
= 25C
120
V
O
(*)
Load Regulation
I
O
= 5 mA to 1.5 A
T
J
= 25C
240
mV
I
O
= 250 to 750 mA
T
J
= 25C
120
I
d
Quiescent Current
T
J
= 25C
3
mA
I
d
Quiescent Current Change
I
O
= 5 mA to 1 A
0.5
mA
V
I
= -15 to -25 V
1
V
O
/
T Output Voltage Drift
I
O
= 5 mA
-0.8
mV/C
eN
Output Noise Voltage
B = 10Hz to 100KHz
T
J
= 25C
200
V
SVR
Supply Voltage Rejection
V
I
= 10 V
f = 120Hz
54
60
dB
V
d
Dropout Voltage
I
O
= 1 A
T
J
= 25C
V
O
= 100 mV
1.1
V
I
sc
Short Circuit Current
1.5
A
I
scp
Short Circuit Peak Current
T
J
= 25C
2.5
A