SGS Thomson Microelectronics L7952CV, L7952CT, L7952CD2T, L7924CV, L7924CT Datasheet
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L7900
SERIES
NEGATIVEVOLTAGE REGULATORS
November 1999
■ OUTPUT CURRENT UP TO1.5 A
■
OUTPUT VOLTAGESOF -5;-5.2; -6;-8; -9;
-12;-15; -18;-20; -22;-24V
■
THERMAL OVERLOADPROTECTION
■ SHORTCIRCUITPROTECTION
■ OUTPUT TRANSITIONSOAPROTECTION
DESCRIPTION
The L7900 series of three-terminal negative
regulators is available in TO-220, ISOWATT220
TO-3 and D
2
PAK packages and several fixed
output voltages, making it useful in a wide range
of applications.Theseregulatorscan provide local
on-card regulation, eliminating the distribution
problems associated with single point regulation;
furthermore, having the same voltage option as
the L7800 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
voltagesand currents.
1
2
TO-3
TO-220 ISOWATT220
1
2
3
1
3
D2PAK
SCHEMATIC DIAGRAM
1/13
CONNECTION DIAGRAM AND ORDERING NUMBERS(top view)
TO-220 & ISOWATT220 TO-3D2PAK
THERMALDATA
Symbol Parameter D2PAK TO-220 ISOWATT220 TO-3 Unit
R
thj-cas e
R
thj-amb
Thermal Resistance Junction-case Max
Thermal Resistance Junction-ambient Max
3
62.5
3
50
4
60
4
35
o
C/W
o
C/W
Type TO-220 D
2
PAK (*) ISOWATT220 TO-3 OutputVoltage
L7905C
L7952C
L7906C
L7908C
L7912C
L7915C
L7918C
L7920C
L7922C
L7924C
L7905CV
L7952CV
L7906CV
L7908CV
L7912CV
L7915CV
L7918CV
L7920CV
L7922CV
L7924CV
L7905CD2T
L7952CD2T
L7906CD2T
L7908CD2T
L7912CD2T
L7915CD2T
L7918CD2T
L7920CD2T
L7922CD2T
L7924CD2T
L7905CP
L7906CP
L7908CP
L7912CP
L7915CP
L7918CP
L7920CP
L7924CP
L7905CT
L7952CT
L7906CT
L7908CT
L7912CT
L7915CT
L7918CT
L7920CT
L7922CT
L7924CT
-5V
-5.2V
-6V
-8V
-12V
-15V
-18V
-20V
-22V
-24V
(*) AVAILABLEIN TAPE AND REEL WITH ”-TR” SUFFIX
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
i
DC InputVoltage (for VO= 5to 18V)
(forV
O
= 20, 24V)
-35
-40
V
V
I
o
OutputCurrent Internally limited
P
tot
PowerDissipation Internally limited
T
op
OperatingJunctionTemperatureRange 0 to 150
o
C
T
stg
StorageTemperature Range - 65 to 150
o
C
APPLICATION CIRCUIT
L7900
2/13
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulce testingwith low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7905C
(refer to the test circuits, T
j
= 0 to 150oC,
V
i
= -10V, Io= 500 mA, Ci= 2.2 µF,Co=1µF unless otherwisespecified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
OutputVoltage Tj=25oC-4.8-5-5.2V
V
o
OutputVoltage Io=-5mAto-1A Po≤15W
V
i
= 8 to20 V
-4.75 -5 -5.25 V
∆
V
o
* LineRegulation Vi=-7to-25V Tj=25oC
V
i
=-8to-12V Tj=25oC
100
50
mV
mV
∆V
o
* LoadRegulation Io=5 to 1500 mA Tj=25oC
I
o
=250 to 750mA Tj=25oC
100
50
mV
mV
I
d
QuiescentCurrent Tj=25oC3mA
∆I
d
QuiescentCurrentChange Io=5 to 1000 mA 0.5 mA
∆I
d
QuiescentCurrentChange Vi=-8to-25V 1.3 mA
∆
V
o
∆
T
OutputVoltageDrift Io=5 mA -0.4 mV/oC
e
N
OutputNoiseVoltage B = 10Hzto 100KHz Tj=25oC100
µ
V
SVR Supply Voltage Rejection ∆V
i
=10V f= 120Hz 54 60 dB
V
d
Dropout Voltage Io=1A Tj=25oC
∆V
O
=100mV
1.4 V
I
sc
ShortCircuit Current 2.1 A
I
scp
ShortCircuit Peak Current Tj=25oC2.5A
ELECTRICAL CHARACTERISTICS FOR L7952C(refer to the test circuits, Tj= 0 to 150oC,
V
i
= -10V, Io= 500 mA, Ci= 2.2 µF,Co=1µF unless otherwisespecified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
OutputVoltage Tj=25oC -5. 0 -5.2 -5.4 V
V
o
OutputVoltage Io=-5mAto-1A P
o
≤
15 W
V
i
=-9to-21V
-4.95 -5.2 -5.45 V
∆V
o
* LineRegulation Vi=-8to-25V Tj=25oC
V
i
=-9to-12V Tj=25oC
105
52
mV
mV
∆
V
o
* LoadRegulation Io=5 to 1500 mA Tj=25oC
I
o
=250 to 750mA Tj=25oC
105
52
mV
mV
I
d
QuiescentCurrent Tj=25oC3mA
∆I
d
QuiescentCurrentChange Io=5 to 1000 mA 0.5 mA
∆
I
d
QuiescentCurrentChange Vi=-9to-25V 1.3 mA
∆
V
o
∆
T
OutputVoltageDrift Io=5 mA -0.5 mV/oC
e
N
OutputNoiseVoltage B = 10Hzto 100KHz Tj=25oC125µV
SVR Supply Voltage Rejection ∆V
i
=10V f= 120Hz 54 60 dB
V
d
Dropout Voltage Io=1A Tj=25oC
∆
V
O
=100mV
1.4 V
I
sc
ShortCircuit Current 2 A
I
scp
ShortCircuit Peak Current Tj=25oC2.5A
L7900
3/13
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulce testingwith low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7906C
(refer to the test circuits, T
j
= 0 to 150oC,
V
i
= -11V, Io= 500 mA, Ci= 2.2 µF,Co=1µF unless otherwisespecified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
OutputVoltage Tj=25oC -5.75 -6 -6.25 V
V
o
OutputVoltage Io=-5mAto-1A Po≤15W
V
i
= -9.5to -21.5V
-5.7 -6 -6.3 V
∆
V
o
* LineRegulation Vi= -8.5to -25V Tj=25oC
V
i
=-9to-15V Tj=25oC
120
60
mV
mV
∆V
o
* LoadRegulation Io=5 to 1500 mA Tj=25oC
I
o
=250 to 750mA Tj=25oC
120
60
mV
mV
I
d
QuiescentCurrent Tj=25oC3mA
∆I
d
QuiescentCurrentChange Io=5 to 1000 mA 0.5 mA
∆I
d
QuiescentCurrentChange Vi= -9.5to -25V 1.3 mA
∆
V
o
∆
T
OutputVoltageDrift Io=5 mA -0.6 mV/oC
e
N
OutputNoiseVoltage B = 10Hzto 100KHz Tj=25oC144
µ
V
SVR Supply Voltage Rejection ∆V
i
=10V f= 120Hz 54 60 dB
V
d
Dropout Voltage Io=1A Tj=25oC
∆V
O
=100mV
1.4 V
I
sc
ShortCircuit Current 2 A
I
scp
ShortCircuit Peak Current Tj=25oC2.5A
ELECTRICAL CHARACTERISTICS FOR L7908C(refer to the test circuits, Tj= 0 to 150oC,
V
i
= -14V, Io= 500 mA, Ci= 2.2 µF,Co=1µF unless otherwisespecified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
o
OutputVoltage Tj=25oC-7.7-8-8.3V
V
o
OutputVoltage Io=-5mAto-1A P
o
≤
15 W
V
i
= -11.5to -23 V
-7.6 -8 -8.4 V
∆V
o
* LineRegulation Vi= -10.5to -25 V Tj=25oC
V
i
= -11to -17 V Tj=25oC
160
80
mV
mV
∆
V
o
* LoadRegulation Io=5 to 1500 mA Tj=25oC
I
o
=250 to 750mA Tj=25oC
160
80
mV
mV
I
d
QuiescentCurrent Tj=25oC3mA
∆I
d
QuiescentCurrentChange Io=5 to 1000 mA 0.5 mA
∆
I
d
QuiescentCurrentChange Vi= -11.5to -25 V 1.3 mA
∆
V
o
∆
T
OutputVoltageDrift Io=5 mA -0.6 mV/oC
e
N
OutputNoiseVoltage B = 10Hzto 100KHz Tj=25oC175µV
SVR Supply Voltage Rejection ∆V
i
=10V f= 120Hz 54 60 dB
V
d
Dropout Voltage Io=1A Tj=25oC
∆
V
O
=100mV
1.1 V
I
sc
ShortCircuit Current 1.5 A
I
scp
ShortCircuit Peak Current Tj=25oC2.5A
L7900
4/13
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