STMicroelectronics L7915C Negative voltage regulator Datasheet

L79xxC
Negative voltage regulators
Datasheet − production data
Features
■
Output current up to 1.5 A
■
Output voltages of - 5; - 8; - 12; - 15 V
■
Thermal overload protection
■
Short circuit protection
■
Output transition SOA protection
TO-220
TO-220FP
Description
The L79xxC series of three-terminal negative
regulators is available in TO-220, TO-220FP and
D²PAK packages and several fixed output
voltages, making it useful in a wide range of
applications. 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 L78xx positive standard series, they are
particularly suited for split power supplies. If
adequate heat sinking is provided, they can
deliver over 1.5 A output current. Although
designed primarily as fixed voltage regulators,
these devices can be used with external
components to obtain adjustable voltages and
currents.
Table 1.
D²PAK
Device summary
Order codes
Part numbers
TO-220
D²PAK
TO-220FP
L7905CD2T-TR
L7905CP
Output
voltages
L7905C
L7905CV
L7905CV-DG (1)
L7908C
L7908CV
L7908CV-DG (1)
L7912C
L7912CV
L7912CV-DG (1)
L7912CD2T-TR
L7912CP
- 12 V
L7915CV
(1)
L7915CD2T-TR
L7915CP
- 15 V
L7915C
L7915CV-DG
-5V
-8V
1. TO-220 Dual Gauge frame.
May 2012
This is information on a product in full production.
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24
Contents
L79xxC
Contents
1
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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L79xxC
Diagram
1
Diagram
Figure 1.
Schematic diagram
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Pin configuration
L79xxC
2
Pin configuration
Figure 2.
Pin connections (top view)
TO-220
TO220FP
D²PAK (any type)
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L79xxC
Maximum ratings
3
Maximum ratings
Table 2.
Absolute maximum ratings
Symbol
Parameter
Value
for VO = - 5 to - 18 V
-35
for VO = - 20 to - 24 V
-40
VI
DC input voltage
IO
Output current
Internally limited
PD
Power dissipation
Internally limited
TSTG
Storage temperature range
TOP
Operating junction temperature range
Unit
V
-65 to 150
°C
0 to 150
°C
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
Table 3.
Thermal data
Symbol
Parameter
RthJC
Thermal resistance junction-case
RthJA
Thermal resistance junction-ambient
D²PAK
TO-220
TO-220FP
Unit
3
5
5
°C/W
62.5
50
60
°C/W
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Test circuit
L79xxC
4
Test circuit
Figure 3.
Test circuit
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L79xxC
5
Electrical characteristics
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C, VI = -10 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF
unless otherwise specified.
Table 4.
Symbol
Electrical characteristics of L7905C
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
TJ = 25°C
-4.8
-5
-5.2
V
VO
Output voltage
IO = -5 mA to -1 A, PO ≤ 15 W
VI = -8 to -20 V
-4.75
-5
-5.25
V
ΔVO(1)
Line regulation
ΔVO(1)
Load regulation
Id
ΔId
ΔVO/ΔT
Quiescent current
Quiescent current change
VI = -7 to -25 V, TJ = 25°C
100
VI = -8 to -12 V, TJ = 25°C
50
IO = 5 mA to 1.5 A, TJ = 25°C
100
IO = 250 to 750 mA, TJ = 25°C
50
TJ = 25°C
3
mV
mV
IO = 5 mA to 1 A
0.5
VI = -8 to -25 V
1.3
mA
mA
Output voltage drift
IO = 5 mA
-0.4
mV/°C
Output noise voltage
B = 10Hz to 100kHz, TJ = 25°C
100
µV
Supply voltage rejection
ΔVI = 10 V, f = 120Hz
60
dB
Vd
Dropout voltage
IO = 1 A, TJ = 25°C, ΔVO = 100 mV
1.4
V
Isc
Short circuit current
2.1
A
eN
SVR
54
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
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Electrical characteristics
L79xxC
Refer to the test circuits, TJ = 0 to 125 °C, VI = -14 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF
unless otherwise specified.
Table 5.
Symbol
Electrical characteristics of L7908C
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
TJ = 25°C
-7.7
-8
-8.3
V
VO
Output voltage
IO = -5 mA to -1 A, PO ≤ 15 W
VI = -11.5 to -23 V
-7.6
-8
-8.4
V
ΔVO(1)
Line regulation
ΔVO(1)
Load regulation
Id
ΔId
ΔVO/ΔT
Quiescent current
Quiescent current change
VI = -10.5 to -25 V, TJ = 25°C
160
VI = -11 to -17 V, TJ = 25°C
80
IO = 5 mA to 1.5 A, TJ = 25°C
160
IO = 250 to 750 mA, TJ = 25°C
80
TJ = 25°C
3
mV
mV
IO = 5 mA to 1 A
mA
0.5
mA
VI = -11.5 to -25 V
1
Output voltage drift
IO = 5 mA
-0.6
mV/°C
Output noise voltage
B = 10Hz to 100kHz, TJ = 25°C
175
µV
Supply voltage rejection
ΔVI = 10 V, f = 120Hz
60
dB
Vd
Dropout voltage
IO = 1 A, TJ = 25°C, ΔVO = 100 mV
1.1
V
Isc
Short circuit current
1.5
A
eN
SVR
54
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
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L79xxC
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C, VI = -19 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF
unless otherwise specified.
Table 6.
Symbol
Electrical characteristics of L7912C
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
TJ = 25°C
-11.5
-12
-12.5
V
VO
Output voltage
IO = -5 mA to -1 A, PO ≤ 15 W
VI = -15.5 to -27 V
-11.4
-12
-12.6
V
ΔVO(1)
Line regulation
ΔVO(1)
Load regulation
Id
ΔId
ΔVO/ΔT
Quiescent current
Quiescent current change
VI = -14.5 to -30 V, TJ = 25°C
240
VI = -16 to -22 V, TJ = 25°C
120
IO = 5 mA to 1.5 A, TJ = 25°C
240
IO = 250 to 750 mA, TJ = 25°C
120
mV
mV
TJ = 25°C
3
IO = 5 mA to 1 A
0.5
VI = -15 to -30 V
1
mA
mA
Output voltage drift
IO = 5 mA
-0.8
mV/°C
Output noise voltage
B = 10Hz to 100kHz, TJ = 25°C
200
µV
Supply voltage rejection
ΔVI = 10 V, f = 120Hz
60
dB
Vd
Dropout voltage
IO = 1 A, TJ = 25°C, ΔVO = 100 mV
1.1
V
Isc
Short circuit current
1.5
A
eN
SVR
54
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
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Electrical characteristics
L79xxC
Refer to the test circuits, TJ = 0 to 125 °C, VI = -23 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF
unless otherwise specified.
Table 7.
Symbol
Electrical characteristics of L7915C
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
TJ = 25°C
-14.4
-15
-15.6
V
VO
Output voltage
IO = -5 mA to -1 A, PO ≤ 15 W
VI = -18.5 to -30 V
-14.3
-15
-15.7
V
ΔVO(1)
Line regulation
ΔVO(1)
Load regulation
Id
ΔId
ΔVO/ΔT
Quiescent current
Quiescent current change
VI = -17.5 to -30 V, TJ = 25°C
300
VI = -20 to -26 V, TJ = 25°C
150
IO = 5 mA to 1.5 A, TJ = 25°C
300
IO = 250 to 750 mA, TJ = 25°C
150
mV
mV
TJ = 25°C
3
IO = 5 mA to 1 A
mA
0.5
mA
VI = -18.5 to -30 V
1
Output voltage drift
IO = 5 mA
-0.9
mV/°C
Output noise voltage
B = 10Hz to 100kHz, TJ = 25°C
250
µV
Supply voltage rejection
ΔVI = 10 V, f = 120Hz
60
dB
Vd
Dropout voltage
IO = 1 A, TJ = 25°C, ΔVO = 100 mV
1.1
V
Isc
Short circuit current
1.3
A
eN
SVR
54
1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
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L79xxC
Application information
6
Application information
Figure 4.
Fixed output regulator
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 electrolytic 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.
Figure 5.
Split power supply (± 15 V - 1 A)
(*) Against potential latch-up problems.
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Application information
Figure 6.
L79xxC
Circuit for increasing output voltage
VO=VXX(R1+R2)/R2
VXX/R2 > 3Id
GND
IN
OUT
C3 Optional for improved transient response and ripple rejection.
Figure 7.
High current negative regulator (- 5 V / 4 A with 5 A current limiting)
IN
OUT
GND
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L79xxC
7
Package mechanical data
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Table 8.
TO-220 mechanical data
Type STD - ST Dual Gauge
Type STD - ST Single Gauge
mm.
mm.
Dim.
Min.
Max.
Min.
Typ.
Max.
A
4.40
4.60
4.40
4.60
b
0.61
0.88
0.61
0.88
b1
1.14
1.70
1.14
1.70
c
0.48
0.70
0.48
0.70
D
15.25
15.75
15.25
15.75
D1
Note:
Typ.
1.27
E
10.00
10.40
10.00
10.40
e
2.40
2.70
2.40
2.70
e1
4.95
5.15
4.95
5.15
F
1.23
1.32
0.51
0.60
H1
6.20
6.60
6.20
6.60
J1
2.40
2.72
2.40
2.72
L
13.00
14.00
13.00
14.00
L1
3.50
3.93
3.50
3.93
L20
16.40
16.40
L30
28.90
28.90
∅P
3.75
3.85
3.75
3.85
Q
2.65
2.95
2.65
2.95
In spite of some difference in tolerances, the packages are compatible.
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Package mechanical data
Figure 8.
L79xxC
Drawing dimension TO-220 (type STD-ST Dual Gauge)
0015988_S
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L79xxC
Figure 9.
Package mechanical data
Drawing dimension TO-220 (type STD-ST Single Gauge)
8174627_B
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Package mechanical data
L79xxC
Figure 10. Drawing dimension tube for TO-220 Dual Gauge (mm)
Figure 11. Drawing dimension tube for TO-220 Single Gauge (mm)
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L79xxC
Package mechanical data
TO-220FP mechanical data
Dim.
mm.
Min.
Typ
inch.
Max.
Min.
Typ.
Max.
A
4.40
4.60
0.173
0.181
B
2.5
2.7
0.098
0.106
D
2.5
2.75
0.098
0.108
E
0.45
0.70
0.017
0.027
F
0.75
1
0.030
0.039
F1
1.15
1.50
0.045
0.059
F2
1.15
1.50
0.045
0.059
G
4.95
5.2
0.194
0.204
G1
2.4
2.7
0.094
0.106
H
10.0
10.40
0.393
L2
L3
16
0.409
0.630
28.6
30.6
1.126
1.204
L4
9.8
10.6
0.385
0.417
L5
2.9
3.6
0.114
0.142
L6
15.9
16.4
0.626
0.645
L7
9
9.3
0.354
0.366
DIA.
3
3.2
0.118
0.126
7012510A-H
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Package mechanical data
L79xxC
Figure 12. Drawing dimension D²PAK (type STD-ST)
0079457/L
18/24
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L79xxC
Package mechanical data
Figure 13. Drawing dimension D²PAK (type WOOSEOK-subcon.)
0079457/L
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Package mechanical data
Table 9.
D²PAK mechanical data
Dim.
Min.
Type WOOSEOK-subcon.
mm.
mm.
Typ.
Max.
Min.
Typ.
Max.
4.40
4.60
4.30
4.70
A1
0.03
0.23
0
0.20
b
0.70
0.93
0.70
0.90
b2
1.14
1.70
1.17
1.37
c
0.45
0.60
0.45
0.50
0.60
c2
1.23
1.36
1.25
1.30
1.40
D
8.95
9.35
9
9.20
9.40
D1
7.50
E
10
E1
8.50
7.50
10.40
9.80
10.20
7.50
2.54
2.54
e1
4.88
5.28
H
15
15.85
15
J1
2.49
2.69
2.20
2.60
L
2.29
2.79
1.79
2.79
L1
1.27
1.40
1
1.40
L2
1.30
1.75
1.20
1.60
R
V2
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Type STD-ST
A
e
Note:
L79xxC
5.08
0.4
0°
15.30
15.60
0.30
8°
0°
3°
The D²PAK package coming from the subcontractor WOOSEOK is fully compatible with the
ST's package suggested footprint.
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L79xxC
Package mechanical data
Figure 14. D²PAK footprint recommended data
Table 10.
Footprint data
Values
Dim.
mm.
inch.
A
12.20
0.480
B
9.75
0.384
C
16.90
0.665
D
3.50
0.138
E
1.60
0.063
F
2.54
0.100
G
5.08
0.200
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Package mechanical data
L79xxC
Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data
mm.
inch.
Dim.
Min.
Typ.
A
Min.
Typ.
180
13.0
13.2
Max.
7.086
C
12.8
D
20.2
0.795
N
60
2.362
T
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Max.
0.504
0.512
14.4
0.519
0.567
Ao
10.50
10.6
10.70
0.413
0.417
0.421
Bo
15.70
15.80
15.90
0.618
0.622
0.626
Ko
4.80
4.90
5.00
0.189
0.193
0.197
Po
3.9
4.0
4.1
0.153
0.157
0.161
P
11.9
12.0
12.1
0.468
0.472
0.476
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L79xxC
Revision history
8
Revision history
Table 11.
Document revision history
Date
Revision
Changes
22-Jun-2004
9
Order codes updated Table 3.
31-Aug-2005
10
Add new order codes (TO-220 E Type) on Table 3.
19-Jan-2007
11
D²PAK mechanical data updated and add footprint data.
06-Jun-2007
12
Order codes updated.
25-Oct-2007
13
Modified: Figure 3, Figure 4, Figure 6 and Figure 7.
05-Dec-2007
14
Modified: Table 1.
18-Feb-2008
15
Modified: Table 1 on page 1.
15-Jul-2008
16
Modified: Table 1 on page 1.
19-Jan-2010
17
Modified: Table 8 on page 13, added: Figure 8 on page 14, Figure 9 on
page 15, Figure 10 and Figure 11 on page 16.
26-May-2010
18
Modified: VI parameter Table 2 on page 5.
12-Nov-2010
19
Modified: RthJC value for TO-220 Table 3 on page 5.
18-Nov-2011
20
Added: order codes L7905CV-DG, L7912CV-DG and L7915CV-DG Table 1 on
page 1.
15-May-2012
21
Added: order codes L7908CV-DG Table 1 on page 1.
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L79xxC
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