STMicroelectronics L7920ACD2T 2% negative voltage regulator Datasheet

L7900AC
SERIES

2% NEGATIVE VOLTAGE REGULATORS
■
■
■
■
■
OUTPUT CURRENT UP TO 1.5 A
OUTPUT VOLTAGES OF -5; -5.2; -6; -8; -12;
-15; -18; -20; -22; -24V
THERMAL OVERLOAD PROTECTION
SHORT CIRCUIT PROTECTION
OUTPUT TRANSITION SOA PROTECTION
DESCRIPTION
The L7900AC series of three-terminal negative
regulators is available in TO-220 and D2PAK
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.
3
1
D2PAK
TO-220
SCHEMATIC DIAGRAM
November 1999
1/11
L7900AC
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
-35
-40
V
V
Vi
DC Input Voltage (for VO = -5 to -18V)
(for V O = -20, -24V)
Io
Output Current
Internally limited
P tot
Power Dissipation
Internally limited
T op
Operating Junction Temperature Range
T st g
Storage Temperature Range
0 to 125
o
C
- 65 to 150
o
C
THERMAL DATA
Symbol
2
Parameter
R thj- ca se Thermal Resistance Junction-case
R thj- amb Thermal Resistance Junction-ambient
Max
Max
D PAK
TO-220
3
62.5
3
50
Unit
o
o
CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)
2
TO-220
Type
L7905AC
L7952AC
L7906AC
L7908AC
L7912AC
L7915AC
L7918AC
L7920AC
L7922AC
L7924AC
D PAK
TO-220
L7905ACV
L7952ACV
L7906ACV
L7908ACV
L7912ACV
L7915ACV
L7918ACV
L7920ACV
L7922ACV
L7924ACV
(*) AVAILABLE IN TAPE AND REEL WITH ”-TR” SUFFIX
APPLICATION CIRCUIT
2/11
D 2PAK (*)
L7905ACD2T
L7952ACD2T
L7906ACD2T
L7908ACD2T
L7912ACD2T
L7915ACD2T
L7918ACD2T
L7920ACD2T
L7922ACD2T
L7924ACD2T
Output Voltage
-5V
-5.2V
-6V
-8V
-12V
-15V
-18V
-20V
-22V
-24V
C/W
C/W
L7900AC
ELECTRICAL CHARACTERISTICS FOR L7905A (refer to the test circuits, T j = 0 to 125 oC,
Vi = -10V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = -5 mA to -1 A
Vi = 8 to 20 V
∆V o *
Line Regulation
Vi = -7 to -25 V
Vi = -8 to -12 V
∆V o *
Load Regulation
Io = 5 to 1500 mA
Io = 250 to 750 mA
Quiescent Current
Tj = 25 C
∆I d
Quiescent Current Change
Io = 5 to 1000 mA
Id
Po ≤ 15 W
Unit
-5.1
V
-4.8
-5
-5.2
V
100
50
mV
mV
100
50
mV
mV
3
mA
0.5
mA
o
o
Quiescent Current Change
Vi = -8 to -25 V
Output Voltage Drift
Io = 5 mA
eN
Output Noise Voltage
B = 10Hz to 100KHz Tj = 25 oC
Supply Voltage Rejection
∆Vi = 10 V
Vd
Dropout Voltage
Io = 1 A
Tj = 25 C
∆VO = 100 mV
Is c
Short Circuit Current
Short Circuit Peak Current
Max.
-5
Tj = 25 C
Tj = 25 oC
∆I d
I scp
Typ.
-4.9
Tj = 25 oC
Tj = 25 oC
∆ Vo
∆T
SVR
Min.
1.3
f = 120 Hz
54
o
o
Tj = 25 C
mA
mV/ oC
-0.4
100
µV
60
dB
1.4
V
2.1
A
2.5
A
ELECTRICAL CHARACTERISTICS FOR L7952A (refer to the test circuits, T j = 0 to 125 oC,
Vi = -10V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = -5 mA to -1 A
Vi = -9 to -21 V
∆V o *
Line Regulation
Vi = -8 to -25 V
Vi = -9 to -13 V
∆V o *
Load Regulation
Io = 5 to 1500 mA
Io = 250 to 750 mA
Quiescent Current
Tj = 25 C
Id
Po ≤ 15 W
Min.
Typ.
Max.
Unit
-5.1
-5.2
-5.3
V
-5
-5.2
-5.4
V
105
52
mV
mV
105
52
mV
mV
3
mA
o
Tj = 25 C
Tj = 25 oC
Tj = 25 oC
Tj = 25 oC
o
∆I d
Quiescent Current Change
Io = 5 to 1000 mA
0.5
mA
∆I d
Quiescent Current Change
Vi = -9 to -25 V
1.3
mA
∆ Vo
∆T
Output Voltage Drift
Io = 5 mA
-0.5
mV/ oC
eN
Output Noise Voltage
B = 10Hz to 100KHz Tj = 25 oC
125
µV
Supply Voltage Rejection
∆Vi = 10 V
60
dB
Io = 1 A
Tj = 25 C
∆VO = 100 mV
1.4
V
2.1
A
Tj = 25 oC
2.5
A
SVR
Vd
Dropout Voltage
Is c
Short Circuit Current
I scp
Short Circuit Peak Current
f = 120 Hz
o
54
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
3/11
L7900AC
ELECTRICAL CHARACTERISTICS FOR L7906A (refer to the test circuits, T j = 0 to 125 oC,
Vi = -11V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified)
Symbol
Min.
Typ.
Max.
Unit
Vo
Output Voltage
Tj = 25 C
-5.88
-6
-6.12
V
Vo
Output Voltage
Io = -5 mA to -1 A Po ≤ 15 W
Vi = -9.5 to -21.5 V
-5.76
-6
-6.24
V
∆V o *
Line Regulation
Vi = -8.5 to -25 V Tj = 25 oC
Vi = -9 to -15 V Tj = 25 oC
120
60
mV
mV
∆V o *
Load Regulation
Io = 5 to 1500 mA
Io = 250 to 750 mA
o
120
60
mV
mV
Quiescent Current
Tj = 25 C
3
mA
∆I d
Quiescent Current Change
Io = 5 to 1000 mA
0.5
mA
Id
Parameter
Test Conditions
o
Tj = 25 C
Tj = 25 oC
o
∆I d
Quiescent Current Change
Vi = -9.5 to -25 V
∆ Vo
∆T
Output Voltage Drift
Io = 5 mA
eN
Output Noise Voltage
B = 10Hz to 100KHz Tj = 25 oC
Supply Voltage Rejection
∆Vi = 10 V
Vd
Dropout Voltage
Io = 1 A
Tj = 25 C
∆VO = 100 mV
Is c
Short Circuit Current
SVR
I scp
Short Circuit Peak Current
1.3
f = 120 Hz
54
o
o
Tj = 25 C
mA
mV/ oC
-0.6
144
µV
60
dB
1.4
V
2
A
2.5
A
ELECTRICAL CHARACTERISTICS FOR L7908A (refer to the test circuits, T j = 0 to 125 oC,
Vi = -14V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Min.
Typ.
Max.
Unit
Vo
Output Voltage
Tj = 25 C
-7.84
-8
-8.16
V
Vo
Output Voltage
Io = -5 mA to -1 A Po ≤ 15 W
Vi = -11.5 to -23 V
-7.68
-8
-8.32
V
∆V o *
Line Regulation
Vi = -10.5 to -25 V Tj = 25 C
Vi = -11 to -17 V Tj = 25 oC
160
80
mV
mV
∆V o *
Load Regulation
Io = 5 to 1500 mA
Io = 250 to 750 mA
160
80
mV
mV
Quiescent Current
Tj = 25 C
3
mA
Id
o
Tj = 25 oC
Tj = 25 oC
o
∆I d
Quiescent Current Change
Io = 5 to 1000 mA
0.5
mA
∆I d
Quiescent Current Change
Vi = -11.5 to -25 V
1
mA
∆ Vo
∆T
Output Voltage Drift
Io = 5 mA
-0.6
mV/ oC
eN
Output Noise Voltage
B = 10Hz to 100KHz Tj = 25 oC
175
µV
Supply Voltage Rejection
∆Vi = 10 V
60
dB
Io = 1 A
Tj = 25 C
∆VO = 100 mV
1.1
V
1.5
A
Tj = 25 oC
2.5
A
SVR
Vd
Dropout Voltage
Is c
Short Circuit Current
I scp
Short Circuit Peak Current
f = 120 Hz
o
54
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
4/11
L7900AC
ELECTRICAL CHARACTERISTICS FOR L7912A (refer to the test circuits, T j = 0 to 125 oC,
Vi = -19V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = -5 mA to -1 A Po ≤ 15 W
Vi = -15.5 to -27 V
∆V o *
Line Regulation
Vi = -14.5 to -30 V Tj = 25 oC
Vi = -16 to -22 V Tj = 25 oC
∆V o *
Load Regulation
Io = 5 to 1500 mA
Io = 250 to 750 mA
Quiescent Current
Tj = 25 C
∆I d
Quiescent Current Change
Io = 5 to 1000 mA
Id
Unit
-12.25
V
-11.5
-12
-12.5
V
240
120
mV
mV
240
120
mV
mV
3
mA
0.5
mA
o
Quiescent Current Change
Vi = -15 to -25 V
Output Voltage Drift
Io = 5 mA
eN
Output Noise Voltage
B = 10Hz to 100KHz Tj = 25 oC
Supply Voltage Rejection
∆Vi = 10 V
Vd
Dropout Voltage
Io = 1 A
Tj = 25 C
∆VO = 100 mV
Is c
Short Circuit Current
Short Circuit Peak Current
Max.
-12
o
∆I d
I scp
Typ.
Tj = 25 C
Tj = 25 oC
∆ Vo
∆T
SVR
Min.
-11.75
1
f = 120 Hz
54
o
o
Tj = 25 C
mA
mV/ oC
-0.8
200
µV
60
dB
1.1
V
1.5
A
2.5
A
ELECTRICAL CHARACTERISTICS FOR L7915A (refer to the test circuits, T j = 0 to 125 oC,
Vi = -23V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Min.
Typ.
Max.
Unit
Vo
Output Voltage
Tj = 25 C
-14.7
-15
-15.3
V
Vo
Output Voltage
Io = -5 mA to -1 A Po ≤ 15 W
Vi = -18.5 to -30 V
-14.4
-15
-15.6
V
∆V o *
Line Regulation
Vi = -17.5 to -30 V Tj = 25 C
Vi = -20 to -26 V Tj = 25 oC
300
150
mV
mV
∆V o *
Load Regulation
Io = 5 to 1500 mA
Io = 250 to 750 mA
300
150
mV
mV
Quiescent Current
Tj = 25 C
3
mA
Id
o
Tj = 25 oC
Tj = 25 oC
o
∆I d
Quiescent Current Change
Io = 5 to 1000 mA
0.5
mA
∆I d
Quiescent Current Change
Vi = -18.5 to -30 V
1
mA
∆ Vo
∆T
Output Voltage Drift
Io = 5 mA
-0.9
mV/ oC
eN
Output Noise Voltage
B = 10Hz to 100KHz Tj = 25 oC
250
µV
Supply Voltage Rejection
∆Vi = 10 V
60
dB
Io = 1 A
Tj = 25 C
∆VO = 100 mV
1.1
V
1.3
A
Tj = 25 oC
2.3
A
SVR
Vd
Dropout Voltage
Is c
Short Circuit Current
I scp
Short Circuit Peak Current
f = 120 Hz
o
54
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
5/11
L7900AC
ELECTRICAL CHARACTERISTICS FOR L7918A (refer to the test circuits, T j = 0 to 125 oC,
Vi = -27V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = -5 mA to -1 A
Vi = -22 to -33 V
∆V o *
Line Regulation
Vi = -21 to -33 V
Vi = -24 to -30 V
∆V o *
Load Regulation
Io = 5 to 1500 mA
Io = 250 to 750 mA
Quiescent Current
Tj = 25 C
∆I d
Quiescent Current Change
Io = 5 to 1000 mA
Id
Po ≤ 15 W
Unit
-18.36
V
-17.3
-18
-18.7
V
360
180
mV
mV
360
180
mV
mV
3
mA
0.5
mA
o
o
Quiescent Current Change
Vi = -22 to -33 V
Output Voltage Drift
Io = 5 mA
eN
Output Noise Voltage
B = 10Hz to 100KHz Tj = 25 oC
Supply Voltage Rejection
∆Vi = 10 V
Vd
Dropout Voltage
Io = 1 A
Tj = 25 C
∆VO = 100 mV
Is c
Short Circuit Current
Short Circuit Peak Current
Max.
-18
Tj = 25 C
Tj = 25 oC
∆I d
I scp
Typ.
Tj = 25 oC
Tj = 25 oC
∆ Vo
∆T
SVR
Min.
-17.64
1
f = 120 Hz
54
o
o
Tj = 25 C
mA
mV/ oC
-1
300
µV
60
dB
1.1
V
1.1
A
2.2
A
ELECTRICAL CHARACTERISTICS FOR L7920A (refer to the test circuits, T j = 0 to 125 oC,
Vi = -29V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified)
Symbol
Parameter
Test Conditions
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = -5 mA to -1 A
Vi = -24 to -35 V
∆V o *
Line Regulation
Vi = -23 to -35 V
Vi = -26 to -32 V
∆V o *
Load Regulation
Io = 5 to 1500 mA
Io = 250 to 750 mA
Quiescent Current
Tj = 25 C
Id
Min.
Typ.
Max.
-19.6
-20
-20.4
V
-19.2
-20
-20.8
V
o
400
200
mV
mV
Tj = 25 oC
Tj = 25 oC
400
200
mV
mV
3
mA
o
Po ≤ 15 W
Tj = 25 C
Tj = 25 oC
o
Unit
∆I d
Quiescent Current Change
Io = 5 to 1000 mA
0.5
mA
∆I d
Quiescent Current Change
Vi = -24 to -35 V
1
mA
∆ Vo
∆T
Output Voltage Drift
Io = 5 mA
-1.1
mV/ oC
eN
Output Noise Voltage
B = 10Hz to 100KHz Tj = 25 oC
350
µV
Supply Voltage Rejection
∆Vi = 10 V
60
dB
Io = 1 A
Tj = 25 C
∆VO = 100 mV
1.1
V
0.9
A
Tj = 25 oC
2.2
A
SVR
Vd
Dropout Voltage
Is c
Short Circuit Current
I scp
Short Circuit Peak Current
f = 120 Hz
o
54
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
6/11
L7900AC
ELECTRICAL CHARACTERISTICS FOR L7922A (refer to the test circuits, T j = 0 to 125 oC,
Vi = -31V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = -5 mA to -1 A
Vi = -26 to -37 V
∆V o *
Line Regulation
Vi = -25 to -37 V
Vi = -28 to -34 V
∆V o *
Load Regulation
Io = 5 to 1500 mA
Io = 250 to 750 mA
Quiescent Current
Tj = 25 C
∆I d
Quiescent Current Change
Io = 5 to 1000 mA
Id
Po ≤ 15 W
Unit
-22.4
V
-21.1
-22
-22.8
V
440
220
mV
mV
440
220
mV
mV
3
mA
0.5
mA
o
o
Quiescent Current Change
Vi = -26 to -37 V
Output Voltage Drift
Io = 5 mA
eN
Output Noise Voltage
B = 10Hz to 100KHz Tj = 25 oC
Supply Voltage Rejection
∆Vi = 10 V
Vd
Dropout Voltage
Io = 1 A
Tj = 25 C
∆VO = 100 mV
Is c
Short Circuit Current
Short Circuit Peak Current
Max.
-22
Tj = 25 C
Tj = 25 oC
∆I d
I scp
Typ.
Tj = 25 oC
Tj = 25 oC
∆ Vo
∆T
SVR
Min.
-21.5
1
f = 120 Hz
54
o
o
Tj = 25 C
mA
mV/ oC
-1.1
375
µV
60
dB
1.1
V
1.1
A
2.2
A
ELECTRICAL CHARACTERISTICS FOR L7924A (refer to the test circuits, T j = 0 to 125 oC,
Vi = -33V, Io = 500 mA, Ci = 2.2 µF, Co = 1 µF unless otherwise specified)
Symbol
Parameter
Test Conditions
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = -5 mA to -1 A
Vi = -27 to -38 V
∆V o *
Line Regulation
Vi = -27 to -38 V
Vi = -30 to -36 V
∆V o *
Load Regulation
Io = 5 to 1500 mA
Io = 250 to 750 mA
Quiescent Current
Tj = 25 C
Id
Min.
Typ.
Max.
-23.5
-24
-24.5
V
-23
-24
-25
V
o
480
240
mV
mV
Tj = 25 oC
Tj = 25 oC
480
240
mV
mV
3
mA
o
Po ≤ 15 W
Tj = 25 C
Tj = 25 oC
o
Unit
∆I d
Quiescent Current Change
Io = 5 to 1000 mA
0.5
mA
∆I d
Quiescent Current Change
Vi = -27 to -38 V
1
mA
∆ Vo
∆T
Output Voltage Drift
Io = 5 mA
eN
Output Noise Voltage
B = 10Hz to 100KHz Tj = 25 oC
Supply Voltage Rejection
∆Vi = 10 V
SVR
Vd
Dropout Voltage
Is c
Short Circuit Current
I scp
Short Circuit Peak Current
-1
mV/ oC
400
µV
60
dB
Io = 1 A
Tj = 25 C
∆VO = 100 mV
1.1
V
1.1
A
Tj = 25 oC
2.2
A
f = 120 Hz
o
54
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
7/11
L7900AC
APPLICATION INFORMATION
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 selected. C1 is required if regulator is located an
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.
Against potential latch-up problems.
Figure 3 : Circuit for Increasing Output Voltage.
Figure 4 : High Current Negative Regulator
(– 5V/4A with 5A current limiting).
VO = V
XX
R1+R2
R2
V XX
> 3I d
R2
C3 Optional for improved transient response and ripple rejection.
Figure 5 : Typical ECL System Power Supply
(– 5.2V/4A).
Optional dropping resistor to reduce the power dissipated in the
boost transistor.
8/11
L7900AC
TO-220 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
A
inch
MAX.
MIN.
TYP.
4.8
C
MAX.
0.189
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
5.21
0.195
5.08
H2
H3
0.200
10.4
10.05
L2
0.409
10.4
0.396
27.1
1.035
16.2
26.7
0.205
0.409
0.638
L3
26.3
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
P011D
9/11
L7900AC
TO-263 (D2PAK) MECHANICAL DATA
mm
DIM.
MIN.
inch
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
D
C2
A2
A
C
DETAIL”A”
DETAIL”A”
A1
B2
E
B
G
L2
L
L3
P011P6/F
10/11
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