SGS Thomson Microelectronics L7952ACV, L7952ACD2T, L7924ACV, L7924ACD2T, L7922ACV Datasheet
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L7900AC
2% NEGATIVEVOLTAGE REGULATORS
■ OUTPUT CURRENT UPTO1.5 A
■ OUTPUT VOLTAGESOF -5;-5.2;-6;-8; -12;
-15;-18;-20;-22; -24V
■ THERMAL OVERLOADPROTECTION
■ SHORTCIRCUITPROTECTION
■ OUTPUT TRANSITIONSOAPROTECTION
DESCRIPTION
The L7900AC series of three-terminal negative
regulators is available in TO-220 and D
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
voltagesand currents.
2
PAK
SERIES
3
1
D2PAK
TO-220
SCHEMATIC DIAGRAM
November 1999
1/11
L7900AC
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
DC InputVoltage(forVO= -5 to-18V)
V
i
OutputCurrent Internally limited
I
o
PowerDissipation Internally limited
P
tot
OperatingJunctionTemperatureRange 0 to 125
T
op
StorageTemperature Range - 65 to 150
T
stg
(forV
= -20, -24V)
O
THERMALDATA
Symbol Parameter D2PAK TO-220 Unit
R
thj-cas e
R
thj-amb
Thermal Resistance Junction-case Max
Thermal Resistance Junction-ambient Max
3
62.5
-35
-40
50
3
o
o
V
V
o
C
o
C
C/W
C/W
CONNECTION DIAGRAM AND ORDERING NUMBERS
TO-220 D2PAK
Type TO-220 D
L7905AC
L7952AC
L7906AC
L7908AC
L7912AC
L7915AC
L7918AC
L7920AC
L7922AC
L7924AC
(*) AVAILABLEIN TAPE AND REEL WITH ”-TR” SUFFIX
L7905ACV
L7952ACV
L7906ACV
L7908ACV
L7912ACV
L7915ACV
L7918ACV
L7920ACV
L7922ACV
L7924ACV
L7905ACD2T
L7952ACD2T
L7906ACD2T
L7908ACD2T
L7912ACD2T
L7915ACD2T
L7918ACD2T
L7920ACD2T
L7922ACD2T
L7924ACD2T
APPLICATION CIRCUIT
(top view)
2
PAK (*) Output Voltage
-5V
-5.2V
-6V
-8V
-12V
-15V
-18V
-20V
-22V
-24V
2/11
L7900AC
ELECTRICALCHARACTERISTICS FOR L7905A
= -10V, Io= 500 mA, Ci= 2.2 µF, Co=1µF unless otherwisespecified)
V
i
(refer to the test circuits,T
= 0 to 125oC,
j
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
OutputVoltage Tj=25oC-4.9-5-5.1V
o
V
OutputVoltage Io=-5mAto-1A Po≤15 W
o
* LineRegulation Vi=-7to-25V Tj=25oC
V
∆
o
∆V
* LoadRegulation Io=5 to1500mA Tj=25oC
o
I
QuiescentCurrent Tj=25oC3mA
d
∆I
QuiescentCurrentChange Io=5 to1000mA 0.5 mA
d
∆I
QuiescentCurrentChange Vi=-8to-25V 1.3 mA
d
∆
V
OutputVoltageDrift Io=5 mA -0.4 mV/oC
o
T
∆
OutputNoise Voltage B = 10Hzto100KHz Tj=25oC100
e
N
SVR Supply VoltageRejection ∆V
V
Dropout Voltage Io=1A Tj=25oC
d
ShortCircuitCurrent 2.1 A
I
sc
I
ShortCircuitPeakCurrent Tj=25oC2.5A
scp
= 8 to20V
V
i
=-8to-12V Tj=25oC
V
i
I
=250to750mA Tj=25oC
o
=10 V f = 120Hz 54 60 dB
i
=100mV
∆V
O
-4.8 -5 -5.2 V
100
50
100
50
1.4 V
mV
mV
mV
mV
V
µ
ELECTRICALCHARACTERISTICS FOR L7952A(referto the test circuits, Tj= 0 to 125oC,
= -10V, Io= 500 mA, Ci= 2.2 µF, Co=1µF unless otherwisespecified)
V
i
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
OutputVoltage Tj=25oC -5. 1 -5.2 -5.3 V
o
V
OutputVoltage Io=-5mAto-1A P
o
* LineRegulation Vi=-8to-25V Tj=25oC
∆V
o
V
* LoadRegulation Io=5 to1500mA Tj=25oC
∆
o
I
QuiescentCurrent Tj=25oC3mA
d
∆I
QuiescentCurrentChange Io=5 to1000mA 0.5 mA
d
I
QuiescentCurrentChange Vi=-9to-25V 1.3 mA
∆
d
V
OutputVoltageDrift Io=5 mA -0.5 mV/oC
∆
o
∆
T
OutputNoise Voltage B = 10Hzto100KHz Tj=25oC125µV
e
N
SVR Supply VoltageRejection ∆V
V
Dropout Voltage Io=1A Tj=25oC
d
ShortCircuitCurrent 2.1 A
I
sc
I
ShortCircuitPeakCurrent Tj=25oC2.5A
scp
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
=-9to-21V
V
i
=-9to-13V Tj=25oC
V
i
=250to750mA Tj=25oC
I
o
=10 V f = 120Hz 54 60 dB
i
V
=100mV
∆
O
15 W
≤
o
-5 -5.2 -5.4 V
105
52
105
52
mV
mV
mV
mV
1.4 V
3/11
L7900AC
ELECTRICALCHARACTERISTICS FOR L7906A
= -11V, Io= 500 mA, Ci= 2.2 µF, Co=1µF unless otherwisespecified)
V
i
(refer to the test circuits,T
= 0 to 125oC,
j
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
OutputVoltage Tj=25oC -5.88 -6 -6.12 V
o
V
OutputVoltage Io=-5mAto-1A Po≤15 W
o
* LineRegulation Vi= -8.5to-25V Tj=25oC
V
∆
o
∆V
* LoadRegulation Io=5 to1500mA Tj=25oC
o
I
QuiescentCurrent Tj=25oC3mA
d
∆I
QuiescentCurrentChange Io=5 to1000mA 0.5 mA
d
∆I
QuiescentCurrentChange Vi= -9.5to-25V 1.3 mA
d
∆
V
OutputVoltageDrift Io=5 mA -0.6 mV/oC
o
T
∆
OutputNoise Voltage B = 10Hzto100KHz Tj=25oC144
e
N
SVR Supply VoltageRejection ∆V
V
Dropout Voltage Io=1A Tj=25oC
d
ShortCircuitCurrent 2 A
I
sc
I
ShortCircuitPeakCurrent Tj=25oC2.5A
scp
= -9.5to-21.5V
V
i
=-9to-15V Tj=25oC
V
i
I
=250to750mA Tj=25oC
o
=10 V f = 120Hz 54 60 dB
i
=100mV
∆V
O
-5.76 - 6 -6. 24 V
120
60
120
60
1.4 V
mV
mV
mV
mV
V
µ
ELECTRICALCHARACTERISTICS FOR L7908A(referto the test circuits, Tj= 0 to 125oC,
= -14V, Io= 500 mA, Ci= 2.2 µF, Co=1µF unless otherwisespecified)
V
i
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
OutputVoltage Tj=25oC -7.84 -8 -8.16 V
o
V
OutputVoltage Io=-5mAto-1A P
o
* LineRegulation Vi= -10.5to-25 V Tj=25oC
∆V
o
V
* LoadRegulation Io=5 to1500mA Tj=25oC
∆
o
I
QuiescentCurrent Tj=25oC3mA
d
∆I
QuiescentCurrentChange Io=5 to1000mA 0.5 mA
d
I
QuiescentCurrentChange Vi= -11.5to-25 V 1 mA
∆
d
V
OutputVoltageDrift Io=5 mA -0.6 mV/oC
∆
o
∆
T
OutputNoise Voltage B = 10Hzto100KHz Tj=25oC175µV
e
N
SVR Supply VoltageRejection ∆V
V
Dropout Voltage Io=1A Tj=25oC
d
ShortCircuitCurrent 1.5 A
I
sc
I
ShortCircuitPeakCurrent Tj=25oC2.5A
scp
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
= -11.5to-23 V
V
i
= -11to-17 V Tj=25oC
V
i
=250to750mA Tj=25oC
I
o
=10 V f = 120Hz 54 60 dB
i
V
=100mV
∆
O
15 W
≤
o
-7.68 - 8 -8. 32 V
160
80
160
80
mV
mV
mV
mV
1.1 V
4/11
L7900AC
ELECTRICALCHARACTERISTICS FOR L7912A
= -19V, Io= 500 mA, Ci= 2.2 µF, Co=1µF unless otherwisespecified)
V
i
(refer to the test circuits,T
= 0 to 125oC,
j
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
OutputVoltage Tj=25oC -11. 75 -12 -12.25 V
o
V
OutputVoltage Io=-5mAto-1A Po≤15 W
o
* LineRegulation Vi= -14.5to-30 V Tj=25oC
V
∆
o
∆V
* LoadRegulation Io=5 to1500mA Tj=25oC
o
I
QuiescentCurrent Tj=25oC3mA
d
∆I
QuiescentCurrentChange Io=5 to1000mA 0.5 mA
d
∆I
QuiescentCurrentChange Vi= -15to-25 V 1 mA
d
∆
V
OutputVoltageDrift Io=5 mA -0.8 mV/oC
o
T
∆
OutputNoise Voltage B = 10Hzto100KHz Tj=25oC200
e
N
SVR Supply VoltageRejection ∆V
V
Dropout Voltage Io=1A Tj=25oC
d
ShortCircuitCurrent 1.5 A
I
sc
I
ShortCircuitPeakCurrent Tj=25oC2.5A
scp
= -15.5to-27 V
V
i
= -16to-22 V Tj=25oC
V
i
I
=250to750mA Tj=25oC
o
=10 V f = 120Hz 54 60 dB
i
=100mV
∆V
O
-11.5 -12 -12.5 V
240
120
240
120
1.1 V
mV
mV
mV
mV
V
µ
ELECTRICALCHARACTERISTICS FOR L7915A(referto the test circuits, Tj= 0 to 125oC,
= -23V, Io= 500 mA, Ci= 2.2 µF, Co=1µF unless otherwisespecified)
V
i
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
OutputVoltage Tj=25oC -14.7 -15 -15.3 V
o
V
OutputVoltage Io=-5mAto-1A P
o
* LineRegulation Vi= -17.5to-30 V Tj=25oC
∆V
o
V
* LoadRegulation Io=5 to1500mA Tj=25oC
∆
o
I
QuiescentCurrent Tj=25oC3mA
d
∆I
QuiescentCurrentChange Io=5 to1000mA 0.5 mA
d
I
QuiescentCurrentChange Vi= -18.5to-30 V 1 mA
∆
d
V
OutputVoltageDrift Io=5 mA -0.9 mV/oC
∆
o
∆
T
OutputNoise Voltage B = 10Hzto100KHz Tj=25oC250µV
e
N
SVR Supply VoltageRejection ∆V
V
Dropout Voltage Io=1A Tj=25oC
d
ShortCircuitCurrent 1.3 A
I
sc
I
ShortCircuitPeakCurrent Tj=25oC2.3A
scp
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
= -18.5to-30 V
V
i
= -20to-26 V Tj=25oC
V
i
=250to750mA Tj=25oC
I
o
=10 V f = 120Hz 54 60 dB
i
V
=100mV
∆
O
15 W
≤
o
-14.4 -15 -15.6 V
300
150
300
150
mV
mV
mV
mV
1.1 V
5/11
L7900AC
ELECTRICALCHARACTERISTICS FOR L7918A
= -27V, Io= 500 mA, Ci= 2.2 µF, Co=1µF unless otherwisespecified)
V
i
(refer to the test circuits,T
= 0 to 125oC,
j
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
OutputVoltage Tj=25oC -17. 64 -18 -18.36 V
o
V
OutputVoltage Io=-5mAto-1A Po≤15 W
o
* LineRegulation Vi= -21to-33 V Tj=25oC
V
∆
o
∆V
* LoadRegulation Io=5 to1500mA Tj=25oC
o
I
QuiescentCurrent Tj=25oC3mA
d
∆I
QuiescentCurrentChange Io=5 to1000mA 0.5 mA
d
∆I
QuiescentCurrentChange Vi= -22to-33 V 1 mA
d
∆
V
OutputVoltageDrift Io=5 mA -1 mV/oC
o
T
∆
OutputNoise Voltage B = 10Hzto100KHz Tj=25oC300
e
N
SVR Supply VoltageRejection ∆V
V
Dropout Voltage Io=1A Tj=25oC
d
ShortCircuitCurrent 1.1 A
I
sc
I
ShortCircuitPeakCurrent Tj=25oC2.2A
scp
= -22to-33 V
V
i
= -24to-30 V Tj=25oC
V
i
I
=250to750mA Tj=25oC
o
=10 V f = 120Hz 54 60 dB
i
=100mV
∆V
O
-17.3 -18 -18.7 V
360
180
360
180
1.1 V
mV
mV
mV
mV
V
µ
ELECTRICALCHARACTERISTICS FOR L7920A(referto the test circuits, Tj= 0 to 125oC,
= -29V, Io= 500 mA, Ci= 2.2 µF, Co=1µF unless otherwisespecified)
V
i
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
OutputVoltage Tj=25oC -19.6 -20 -20.4 V
o
V
OutputVoltage Io=-5mAto-1A P
o
* LineRegulation Vi= -23to-35 V Tj=25oC
∆V
o
V
* LoadRegulation Io=5 to1500mA Tj=25oC
∆
o
I
QuiescentCurrent Tj=25oC3mA
d
∆I
QuiescentCurrentChange Io=5 to1000mA 0.5 mA
d
I
QuiescentCurrentChange Vi= -24to-35 V 1 mA
∆
d
V
OutputVoltageDrift Io=5 mA -1.1 mV/oC
∆
o
∆
T
OutputNoise Voltage B = 10Hzto100KHz Tj=25oC350µV
e
N
SVR Supply VoltageRejection ∆V
V
Dropout Voltage Io=1A Tj=25oC
d
ShortCircuitCurrent 0.9 A
I
sc
I
ShortCircuitPeakCurrent Tj=25oC2.2A
scp
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
= -24to-35 V
V
i
= -26to-32 V Tj=25oC
V
i
=250to750mA Tj=25oC
I
o
=10 V f = 120Hz 54 60 dB
i
V
=100mV
∆
O
15 W
≤
o
-19.2 -20 -20.8 V
400
200
400
200
mV
mV
mV
mV
1.1 V
6/11
L7900AC
ELECTRICALCHARACTERISTICS FOR L7922A
= -31V, Io= 500 mA, Ci= 2.2 µF, Co=1µF unless otherwisespecified)
V
i
(refer to the test circuits,T
= 0 to 125oC,
j
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
OutputVoltage Tj=25oC -21.5 -22 -22.4 V
o
V
OutputVoltage Io=-5mAto-1A Po≤15 W
o
* LineRegulation Vi= -25to-37 V Tj=25oC
V
∆
o
∆V
* LoadRegulation Io=5 to1500mA Tj=25oC
o
I
QuiescentCurrent Tj=25oC3mA
d
∆I
QuiescentCurrentChange Io=5 to1000mA 0.5 mA
d
∆I
QuiescentCurrentChange Vi= -26to-37 V 1 mA
d
∆
V
OutputVoltageDrift Io=5 mA -1.1 mV/oC
o
T
∆
OutputNoise Voltage B = 10Hzto100KHz Tj=25oC375
e
N
SVR Supply VoltageRejection ∆V
V
Dropout Voltage Io=1A Tj=25oC
d
ShortCircuitCurrent 1.1 A
I
sc
I
ShortCircuitPeakCurrent Tj=25oC2.2A
scp
= -26to-37 V
V
i
= -28to-34 V Tj=25oC
V
i
I
=250to750mA Tj=25oC
o
=10 V f = 120Hz 54 60 dB
i
=100mV
∆V
O
-21.1 -22 -22.8 V
440
220
440
220
1.1 V
mV
mV
mV
mV
V
µ
ELECTRICALCHARACTERISTICS FOR L7924A(referto the test circuits, Tj= 0 to 125oC,
= -33V, Io= 500 mA, Ci= 2.2 µF, Co=1µF unless otherwisespecified)
V
i
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
OutputVoltage Tj=25oC -23.5 -24 -24.5 V
o
V
OutputVoltage Io=-5mAto-1A P
o
* LineRegulation Vi= -27to-38 V Tj=25oC
∆V
o
V
* LoadRegulation Io=5 to1500mA Tj=25oC
∆
o
I
QuiescentCurrent Tj=25oC3mA
d
∆I
QuiescentCurrentChange Io=5 to1000mA 0.5 mA
d
I
QuiescentCurrentChange Vi= -27to-38 V 1 mA
∆
d
V
OutputVoltageDrift Io=5 mA -1 mV/oC
∆
o
∆
T
OutputNoise Voltage B = 10Hzto100KHz Tj=25oC400µV
e
N
SVR Supply VoltageRejection ∆V
V
Dropout Voltage Io=1A Tj=25oC
d
ShortCircuitCurrent 1.1 A
I
sc
I
ShortCircuitPeakCurrent Tj=25oC2.2A
scp
* Load and line regulation are specified at constant junction temperature. Changes in Vodue to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
= -27to-38 V
V
i
= -30to-36 V Tj=25oC
V
i
=250to750mA Tj=25oC
I
o
=10 V f = 120Hz 54 60 dB
i
V
=100mV
∆
O
15 W
≤
o
-23 -24 -25 V
480
240
480
240
mV
mV
mV
mV
1.1 V
7/11
L7900AC
APPLICATION INFORMATION
Figure1 : Fixed OutputRegulator. Figure2 : SplitPowerSupply (± 15V/1A).
Notes :
1. To specify an output voltage, substitute voltagevaluefor ”XX”.
2. Required for stability. For value given, capacitor must be solid
tantalum. If aluminium electrolitics are used, at least ten times
value should be selected. C
appreciable distance from power supply filter.
3. To improve transient response. If large capacitors are used, a
high current diode from input to output (1N4001 or similar) should
be introduced to protect the device from momentary input short
circuit.
is required if regulator is located an
1
Against potentiallatch-up problems.
Figure 3 : Circuitfor IncreasingOutputVoltage. Figure 4 : High Current Negative Regulator
(– 5V/4A with 5A current limiting).
R
+
R
1
=
V
V
O
XX
2
R
2
V
XX
> 3
I
d
R
2
C3 Optional forimprovedtransient response and ripple rejection.
Figure5 : Typical ECL System Power Supply
(– 5.2V/4A).
Optional dropping resistor to reduce the power dissipated in the
boost transistor.
8/11
TO-220 MECHANICAL DATA
L7900AC
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.8 0.189
C 1.37 0.054
D 2.4 2.8 0.094 0.110
D1 1.2 1.35 0.047 0.053
E 0.35 0.55 0.014 0.022
F 0.61 0.94 0.024 0.037
F2 1.15 1.4 0.045 0.055
G 4.95 5.08 5.21 0.195 0.200 0.205
H2 10.4 0.409
H3 10.05 10.4 0.396 0.409
L2 16.2 0.638
L3 26.3 26.7 27.1 1.035 1.051 1.067
L5 2.6 3 0.102 0.118
L6 15.1 15.8 0.594 0.622
L7 6 6.6 0.236 0.260
Dia. 3.65 3.85 0.144 0.152
mm inch
P011D
9/11
L7900AC
TO-263 (D2PAK) MECHANICALDATA
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.4 4.6 0.173 0.181
A1 2.49 2.69 0.098 0.106
B 0.7 0.93 0.027 0.036
B2 1.14 1.7 0.044 0.067
C 0.45 0.6 0.017 0.023
C2 1.23 1.36 0.048 0.053
D 8.95 9.35 0.352 0.368
E 10 10.4 0.393 0.409
G 4.88 5.28 0.192 0.208
L 15 15.85 0.590 0.624
L2 1.27 1.4 0.050 0.055
L3 1.4 1.75 0.055 0.068
mm inch
10/11
D
A
C2
DETAIL”A”
C
A2
DETAIL”A”
A1
B2
E
L2
L
L3
B
G
P011P6/F
L7900AC
Information furnished isbelieved tobe accurate andreliable. However, STMicroelectronics assumes no responsibility fortheconsequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. Thispublication supersedes andreplaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems withoutexpress written approval of STMicroelectronics.
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.
11/11
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