L7905CV

L7900SERIES
NEGATIVE VOLTAGE REGULATORS
.OUTPUT CURRENT UP TO 1.5A
.OUTPUT VOLTAGES OF –5;–5.2;-6;–8;–12;–15;–18;–20;–22;–24V
.THERMAL OVERLOAD PROTECTION .SHORT CIRCUIT PROTECTION
.
OUTPUT TRANSISTOR SOA PROTECTION
DESCRIPTION
The L7900series of three-terminal negative regula-tors is available in TO-220and TO-3packages and with several output voltages.They can provide local on-card regulation,eliminating the distribution prob-lems associated with single point regulation;further-more,having the same voltage options as the L7800positive standard series,they are particularly suited for split power supplies.In addition,the –5.2V is also available for ECL system.
If adegua te heatsinking is provided,the L7900series can deliver an output current in excess of 1.5A.Although designed primarly as fixed voltage regulators,these devices can be used with external components to obtain adjustable voltages and cur-rents.
SCHEMATIC DIAGRAM
January 1993TO-3
TO-220ISOWATT220
1/12
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V i DC Input Voltage(for V o=–5to–18V)
(for V o=–20,–24V)–35
–40
V
V
I o Output Current Internally limited
P t o t Total Power Dissipation Internally limited
T o p Operating Junction Temperature0to+150°C T s t g Storage Temperature–65to+150°C
THERMAL DATA
TO-3TO-220ISOWATT220
R thj-case Thermal Resistance Junction-Case Max434o C/W R thj-amb Thermal Resistance Junction-Ambient Max355060o C/W
CONNECTION DIAGRAM AND ORDERING NUMBERS(top views)
TYPE TO-3TO-220ISOWATT220OUTPUT VOLTAGE L7905C L7905CT L7905CV L7905CP-5V
L7952C L7952CT L7952CV-5.2V
L7906C L7906CT L7906CV L7906CP-6V
L7908C L7908CT L7908CV L7908CP-8V
L7912C L7912CT L7912CV L7912CP-12V
L7915C L7915CT L7915CV L7915CP-15V
L7918C L7918CT L7918CV L7918CP-18V
L7920C L7920CT L7920CV L7920CP-20V
L7922C L7922CT L7922CV-22V
L7924C L7924CT L7924CV L7924CP-24V
APPLICATION CIRCUIT
L7900SERIES
2/12
ELECTRICAL CHARACTERISTICS FOR L7905C(refer to the test circuits,T j=0to150o C,
V i=-10V,I o=500mA,C i=2.2µF,C o=1µF unless otherwise specified)
Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage T j=25o C-4.8-5-5.2V V o Output Voltage I o=-5mA to-1A P o≤15W
V i=8to20V
-4.75-5-5.25V
∆V o*Line Regulation V i=-7to-25V T j=25o C
V i=-8to-12V T j=25o C 100
50
mV
mV
∆V o*Load Regulation I o=5to1500mA T j=25o C
I o=250to750mA T j=25o C 100
50
mV
mV
I d Quiescent Current T j=25o C3mA
∆I d Quiescent Current Change I o=5to1000mA0.5mA ∆I d Quiescent Current Change V i=-8to-25V 1.3mA ∆V o
∆T
Output Voltage Drift I o=5mA-0.4mV/o C
e N Output Noise Voltage B=10Hz to100KHz T j=25o C100µV
SVR Supply Voltage Rejection∆V i=10V f=120Hz5460dB V d Dropout Voltage I o=1A T j=25o C
∆V O=100mV
1.4V
I sc Short Circuit Current 2.1A
I scp Short Circuit Peak Current T j=25o C 2.5A
ELECTRICAL CHARACTERISTICS FOR L7952C(refer to the test circuits,T j=0to150o C,
V i=-10V,I o=500mA,C i=2.2µF,C o=1µF unless otherwise specified)
Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage T j=25o C-5.0-5.2-5.4V V o Output Voltage I o=-5mA to-1A P o≤15W
V i=-9to-21V
-4.95-5.2-5.45V
∆V o*Line Regulation V i=-8to-25V T j=25o C
V i=-9to-12V T j=25o C 105
52
mV
mV
∆V o*Load Regulation I o=5to1500mA T j=25o C
I o=250to750mA T j=25o C 105
52
mV
mV
I d Quiescent Current T j=25o C3mA
∆I d Quiescent Current Change I o=5to1000mA0.5mA ∆I d Quiescent Current Change V i=-9to-25V 1.3mA ∆V o
∆T
Output Voltage Drift I o=5mA-0.5mV/o C
e N Output Noise Voltage B=10Hz to100KHz T j=25o C125µV
SVR Supply Voltage Rejection∆V i=10V f=120Hz5460dB V d Dropout Voltage I o=1A T j=25o C
∆V O=100mV
1.4V
I sc Short Circuit Current2A
I scp Short Circuit Peak Current T j=25o C 2.5A
*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.
L7900SERIES
3/12
ELECTRICAL CHARACTERISTICS FOR L7906C(refer to the test circuits,T j=0to150o C,
V i=-11V,I o=500mA,C i=2.2µF,C o=1µF unless otherwise specified)
Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage T j=25o C-5.75-6-6.25V V o Output Voltage I o=-5mA to-1A P o≤15W
V i=-9.5to-21.5V
-5.7-6-6.3V
∆V o*Line Regulation V i=-8.5to-25V T j=25o C
V i=-9to-15V T j=25o C 120
60
mV
mV
∆V o*Load Regulation I o=5to1500mA T j=25o C
I o=250to750mA T j=25o C 120
60
mV
mV
I d Quiescent Current T j=25o C3mA
∆I d Quiescent Current Change I o=5to1000mA0.5mA ∆I d Quiescent Current Change V i=-9.5to-25V 1.3mA ∆V o
∆T
Output Voltage Drift I o=5mA-0.6mV/o C
e N Output Noise Voltage B=10Hz to100KHz T j=25o C144µV
SVR Supply Voltage Rejection∆V i=10V f=120Hz5460dB V d Dropout Voltage I o=1A T j=25o C
∆V O=100mV
1.4V
I sc Short Circuit Current2A
I scp Short Circuit Peak Current T j=25o C 2.5A
ELECTRICAL CHARACTERISTICS FOR L7908C(refer to the test circuits,T j=0to150o C,
V i=-14V,I o=500mA,C i=2.2µF,C o=1µF unless otherwise specified)
Symbol Parameter Test Conditions Min.Typ.Max.Unit V o Output Voltage T j=25o C-7.7-8-8.3V V o Output Voltage I o=-5mA to-1A P o≤15W
V i=-11.5to-23V
-7.6-8-8.4V
∆V o*Line Regulation V i=-10.5to-25V T j=25o C
V i=-11to-17V T j=25o C 160
80
mV
mV
∆V o*Load Regulation I o=5to1500mA T j=25o C
I o=250to750mA T j=25o C 160
80
mV
mV
I d Quiescent Current T j=25o C3mA
∆I d Quiescent Current Change I o=5to1000mA0.5mA ∆I d Quiescent Current Change V i=-11.5to-25V 1.3mA ∆V o
∆T
Output Voltage Drift I o=5mA-0.6mV/o C
e N Output Noise Voltage B=10Hz to100KHz T j=25o C175µV
SVR Supply Voltage Rejection∆V i=10V f=120Hz5460dB V d Dropout Voltage I o=1A T j=25o C
∆V O=100mV
1.1V
I sc Short Circuit Current 1.5A
I scp Short Circuit Peak Current T j=25o C 2.5A
*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.
L7900SERIES
4/12
*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7912C (refer to the test circuits,T j =0to 150o C,V i =-19V,I o =500mA,C i =2.2µF,C o =1µF unless otherwise specified)
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V o Output Voltage T j =25o
C -11.5-12-12.5V V o Output Voltage I o =-5mA to -1A P o ≤15W
V i =-15.5to -27V
-11.4
-12
-12.6V ∆V o *Line Regulation V i =-14.5to -30V T j =25o C V i =-16to -22V T j =25o C 240120mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o C I o =250to 750mA T j =25o C
240120mV mV I d Quiescent Current T j =25o C 3mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =-15to -30V 1
mA ∆V o ∆T Output Voltage Drift I o =5mA
-0.8mV/o C e N Output Noise Voltage B =10Hz to 100KHz T j =25o C 200µV SVR Supply Voltage Rejection ∆V i =10V
f =120Hz
54
60dB V d Dropout Voltage I o =1A T j =25o C ∆V O =100mV
1.1V I sc Short Circuit Current 1.5A I scp
Short Circuit Peak Current
T j =25o
C
2.5
A
ELECTRICAL CHARACTERISTICS FOR L7915C (refer to the test circuits,T j =0to 150o
C,V i =-23V,I o =500mA,C i =2.2µF,C o =1µF unless otherwise specified)
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V o Output Voltage T j =25o C -14.4-15-15.6V V o Output Voltage I o =-5mA to -1A P o ≤15W
V i =-18.5to -30V
-14.3
-15
-15.7V ∆V o *Line Regulation V i =-17.5to -30V T j =25o C V i =-20to -26V T j =25o C 300150mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o C I o =250to 750mA T j =25o C
300150mV mV I d Quiescent Current T j =25o C 3mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =-18.5to -30V 1
mA ∆V o ∆T Output Voltage Drift I o =5mA
-0.9mV/o C e N Output Noise Voltage B =10Hz to 100KHz T j =25o C 250
µV SVR Supply Voltage Rejection ∆V i =10V
f =120Hz
54
60dB V d Dropout Voltage I o =1A T j =25o C ∆V O =100mV
1.1V I sc Short Circuit Current 1.3A I scp
Short Circuit Peak Current
T j =25o C 2.3
A
L7900SERIES
5/12
*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7918C (refer to the test circuits,T j =0to 150o C,V i =-27V,I o =500mA,C i =2.2µF,C o =1µF unless otherwise specified)
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V o Output Voltage T j =25o
C -17.3-18-18.7V V o Output Voltage I o =-5mA to -1A P o ≤15W V i =-22to -33V -17.1
-18
-18.9V ∆V o *Line Regulation V i =-21to -33V T j =25o C V i =-24to -30V T j =25o C 360180mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o C I o =250to 750mA T j =25o C
360180mV mV I d Quiescent Current T j =25o C 3mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =-22to -33V 1
mA ∆V o ∆T Output Voltage Drift I o =5mA
-1mV/o C e N Output Noise Voltage B =10Hz to 100KHz T j =25o C 300
µV SVR Supply Voltage Rejection ∆V i =10V
f =120Hz
54
60dB V d Dropout Voltage I o =1A T j =25o C ∆V O =100mV
1.1V I sc Short Circuit Current 1.1A I scp
Short Circuit Peak Current
T j =25o
C
2.2
A
ELECTRICAL CHARACTERISTICS FOR L7920C (refer to the test circuits,T j =0to 150o
C,V i =-29V,I o =500mA,C i =2.2µF,C o =1µF unless otherwise specified)
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V o Output Voltage T j =25o C -19.2-20-20.8V V o Output Voltage I o =-5mA to -1A P o ≤15W V i =-24to -35V -19
-20
-21V ∆V o *Line Regulation V i =-23to -35V T j =25o C V i =-26to -32V T j =25o C 400200mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o C I o =250to 750mA T j =25o C
400200mV mV I d Quiescent Current T j =25o C 3mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =-24to -35V 1
mA ∆V o ∆T Output Voltage Drift I o =5mA
-1.1mV/o C e N Output Noise Voltage B =10Hz to 100KHz T j =25o C 350µV SVR Supply Voltage Rejection ∆V i =10V
f =120Hz
54
60dB V d Dropout Voltage I o =1A T j =25o C ∆V O =100mV
1.1V I sc Short Circuit Current 0.9A I scp
Short Circuit Peak Current
T j =25o C 2.5
A
L7900SERIES
6/12
*Load and line regulation are specified at constant junction temperature.Changes in V o due to heating effects must be taken into account separately.Pulce testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7922C (refer to the test circuits,T j =0to 150o C,V i =-31V,I o =500mA,C i =2.2µF,C o =1µF unless otherwise specified)
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V o Output Voltage T j =25o
C -21.1-22-22.9V V o Output Voltage I o =-5mA to -1A P o ≤15W V i =-26to -37V -20.9
-22
-23.1V ∆V o *Line Regulation V i =-25to -37V T j =25o C V i =-28to -34V T j =25o C 440220mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o C I o =250to 750mA T j =25o C
440220mV mV I d Quiescent Current T j =25o C 3mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =-26to -37V 1
mA ∆V o ∆T Output Voltage Drift I o =5mA
-1.1mV/o C e N Output Noise Voltage B =10Hz to 100KHz T j =25o C 375
µV SVR Supply Voltage Rejection ∆V i =10V
f =120Hz
54
60dB V d Dropout Voltage I o =1A T j =25o C ∆V O =100mV
1.1V I sc Short Circuit Current 1.1A I scp
Short Circuit Peak Current
T j =25o
C
2.2
A
ELECTRICAL CHARACTERISTICS FOR L7924C (refer to the test circuits,T j =0to 150o
C,V i =-33V,I o =500mA,C i =2.2µF,C o =1µF unless otherwise specified)
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V o Output Voltage T j =25o C -23-24-25V V o Output Voltage I o =-5mA to -1A P o ≤15W V i =-27to -38V -22.8
-24
-25.2V ∆V o *Line Regulation V i =-27to -38V T j =25o C V i =-30to -36V T j =25o C 480240mV mV ∆V o *Load Regulation I o =5to 1500mA T j =25o C I o =250to 750mA T j =25o C
480240mV mV I d Quiescent Current T j =25o C 3mA ∆I d Quiescent Current Change I o =5to 1000mA 0.5mA ∆I d Quiescent Current Change V i =-27to -38V 1
mA ∆V o ∆T Output Voltage Drift I o =5mA
-1mV/o C e N Output Noise Voltage B =10Hz to 100KHz T j =25o C 400µV SVR Supply Voltage Rejection ∆V i =10V
f =120Hz
54
60dB V d Dropout Voltage I o =1A T j =25o C ∆V O =100mV
1.1V I sc Short Circuit Current 1.1A I scp
Short Circuit Peak Current
T j =25o C 2.2
A
L7900SERIES
7/12
Figure 1:Fixed Output Regulator.
Figure 2:Split Power Supply (±15V/1A).
Notes :1.
To specify an output voltage,substitute voltage value for ”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 se-lected.C 1is required if regulator is located an appreciable distance from power supply filter.3.
To improve transient response.If large capaci-tors are used,a high current diode from input to output (1N4001or similar)should be introduced to protect the device from momentary input short circuit.
*Against poten tial latch-up prob lems.
APPLICATION INFORMATION Figure 3:Circuit for Increasing Output Voltage.
Figure 4:High Current Negative Regulator
(–5V/4A with 5A current limiting).
R1+R2V O ≅V XX ⋅
R2*C3Optional for improved transient respons e and ripple rejection.
V XX
>3I d
R2
Figure 5:Typical ECL System Power Supply
(–5.2V/4A).
*Optiona l droppi n g resistor to reduce the power dissipat ed in the boost transistor.
L7900SERIES
8/12
DIM.
mm
inch MIN.
TYP.
MAX.MIN.TYP.
MAX.A 11.0013.100.4330.516B 0.97 1.150.0380.045C 1.50 1.650.0590.065D 8.328.920.3270.351E 19.0020.000.7480.787G 10.7011.100.4210.437N 16.5017.200.6490.677P 25.0026.000.984 1.023R 4.00 4.090.1570.161U 38.5039.30 1.515 1.547V
30.00
30.30
1.187
1.193
C
D
N
B
V
U
R
A P E
G
O
P003F
TO-3MECHANICAL DATA
L7900SERIES
9/12
DIM.mm
inch MIN.TYP.
MAX.MIN.TYP.
MAX.A 4.40 4.600.1730.181C 1.23 1.320.0480.051D 2.40
2.72
0.094
0.107
D1 1.27
0.050
E 0.490.700.0190.027
F 0.610.880.0240.034F1 1.14 1.700.0440.067F2 1.14 1.700.0440.067
G 4.95 5.150.1940.203G1 2.4 2.70.0940.106H210.0
10.40
0.393
0.409
L216.4
0.645
L413.014.00.5110.551L5 2.65 2.950.1040.116L615.215.90.5980.625L7 6.2 6.60.2440.260L9 3.5 4.20.1370.165DIA.
3.75 3.85
0.147
0.151
L6
A
C
D
E
D 1
F
G
L7
L2
Dia.
F 1
L5
L4
H 2
L9
F 2
G 1
TO-220MECHANICAL DATA
P011C
L7900SERIES
10/12
DIM.
mm inch MIN.
TYP.
MAX.MIN.TYP.
MAX.A 4.4 4.60.1730.181B 2.5 2.70.0980.106D 2.5 2.750.0980.108E 0.40.70.0150.027F 0.7510.0300.039F1 1.15 1.70.0450.067F2 1.15 1.70.0450.067G 4.95 5.20.1950.204G1 2.4 2.70.0940.106H 10
10.4
0.393
0.409
L216
0.630
L328.630.6 1.126 1.204L49.810.60.3850.417L615.916.40.6260.645L799.30.354 3.66Ø
3 3.2
0.118
0.126
L2
A
B
D
E
H
G
L6
Ø
F
L3
G 1
123
F 2
F 1
L7
L4
ISOWATT220MECHANICAL DATA
P011G
L7900SERIES
11/12
L7900SERIES
Information furnished is believed to be accurate and reliable.However,SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use.No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.Specificationsmentioned in this publication are subject to change without notice.This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics.
©1994SGS-THOMSON Microelectronics-All Rights Reserved
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12/12。