STMicroelectronics L7924C Negative voltage regulator Datasheet

L79xxC
Negative voltage regulators
Features
■
Output current up to 1.5 A
■
Output voltages of -5; -6; -8; -12; -15; -18; -20;
-24V
■
Thermal overload protection
■
Short circuit protection
■
Output transition SOA protection
TO-220FP
TO-220
Description
The L79XXC series of three-terminal negative
regulators is available in TO-220, TO-220FP,
TO-3 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.
Table 1.
D2PAK
TO-3
Although designed primarily as fixed voltage
regulators, these devices can be used with
external components to obtain adjustable
voltages and currents.
Device summary
Packages
Part number
TO-220
(A type)
D2PAK
TO-220FP
L7905C
L7905CV
L7905CD2T-TR
L7905CP
L7906C
L7906CV
-6 V
L7908C
L7908CV
-8 V
L7912C
L7912CV
L7912CD2T-TR
L7912CP
L7915C
L7915CV
L7915CD2T-TR
L7915CP
L7918C
L7918CV
L7920C
L7920CV
L7924C
1.
TO-3
Out. Volt.
-5 V
-12 V
L7915CT
-15 V
-18 V
L7920CD2T-TR (1)
L7924CV
-20 V
L7924CP
(1)
L7924CT
-24 V
Available on request.
December 2007
Rev 14
1/24
www.st.com
24
Contents
L79xxC
Contents
1
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Test circuit
5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2/24
................................................ 6
L79xxC
Diagram
1
Diagram
Figure 1.
Schematic diagram
3/24
Pin configuration
L79xxC
2
Pin configuration
Figure 2.
Pin connections (top view)
TO-220
D2PAK (any type)
4/24
TO220FP
TO-3
L79xxC
Maximum ratings
3
Maximum ratings
Table 2.
Absolute maximum ratings
Symbol
Parameter
Value
for VO= 5 to 18V
-35
for VO= 20, 24V
-40
Unit
VI
DC input voltage
IO
Output current
Internally Limited
PD
Power dissipation
Internally Limited
TSTG
Storage temperature range
TOP
Operating junction temperature range
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
TO-3
Unit
3
3
5
4
°C/W
62.5
50
60
35
°C/W
5/24
Test circuit
L79xxC
4
Test circuit
Figure 3.
Test circuit
6/24
L79xxC
Electrical characteristics
5
Electrical characteristics
Table 4.
Electrical characteristics of L7905C (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)
Symbol
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.
7/24
Electrical characteristics
Table 5.
Symbol
L79xxC
Electrical characteristics of L7906C (refer to the test circuits, TJ = 0 to 125 °C, VI = -11 V,
IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified)
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
TJ = 25°C
-5.75
-6
-6.25
V
VO
Output voltage
IO = -5 mA to -1 A, PO ≤15 W
VI = -9.5 to -21.5 V
-5.7
-6
-6.3
V
ΔVO(1)
Line regulation
ΔVO(1)
Load regulation
Id
ΔId
ΔVO/ΔT
Quiescent current
Quiescent current change
VI = -8.5 to -25 V, TJ = 25°C
120
VI = -9 to -15 V, TJ = 25°C
60
IO = 5 mA to 1.5 A, TJ = 25°C
120
IO = 250 to 750 mA, TJ = 25°C
60
TJ = 25°C
3
mV
mV
IO = 5 mA to 1 A
0.5
VI = -9.5 to -25 V
1.3
mA
mA
Output voltage drift
IO = 5 mA
-0.6
mV/°C
Output noise voltage
B = 10Hz to 100kHz, TJ = 25°C
144
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
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.
Table 6.
Symbol
Electrical characteristics of L7908C (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)
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.
8/24
L79xxC
Electrical characteristics
Table 7.
Electrical characteristics of L7912C (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)
Symbol
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.
Table 8.
Symbol
Electrical characteristics of L7915C (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)
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.
9/24
Electrical characteristics
Table 9.
Symbol
L79xxC
Electrical characteristics of L7918C (refer to the test circuits, TJ = 0 to 125 °C, VI = -27 V,
IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified)
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
TJ = 25°C
-17.3
-18
-18.7
V
VO
Output voltage
IO = -5 mA to -1 A, PO ≤15 W
VI = -22 to -33 V
-17.1
-18
-18.9
V
ΔVO(1)
Line regulation
ΔVO(1)
Load regulation
Id
ΔId
ΔVO/ΔT
Quiescent current
Quiescent current change
VI = -21 to -33 V, TJ = 25°C
360
VI = -24 to -30 V, TJ = 25°C
180
IO = 5 mA to 1.5 A, TJ = 25°C
360
IO = 250 to 750 mA, TJ = 25°C
180
3
IO = 5 mA to 1 A
0.5
VI = -22 to -33 V
1
IO = 5 mA
Output noise voltage
B = 10Hz to 100kHz, TJ = 25°C
Supply voltage rejection
ΔVI = 10 V, f = 120Hz
Vd
Dropout voltage
IO = 1 A, TJ = 25°C, ΔVO = 100 mV
Isc
Short circuit current
SVR
mV
TJ = 25°C
Output voltage drift
eN
mV
mA
mA
54
-1
mV/°C
300
µV
60
dB
1.1
V
1.1
A
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.
Table 10.
Symbol
Electrical characteristics of L7920C (refer to the test circuits, TJ = 0 to 125 °C, VI = -29 V,
IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified)
Parameter
Test conditions
VO
Output voltage
TJ = 25°C
VO
Output voltage
IO = -5 mA to -1 A, PO ≤15 W
VI = -24 to -35 V
ΔVO(1)
Line regulation
ΔVO(1)
Load regulation
Id
ΔId
ΔVO/ΔT
Quiescent current
Quiescent current change
Min.
Typ.
Max.
Unit
-19.2
-20
-20.8
V
-19
-20
-21
V
VI = -23 to -35 V, TJ = 25°C
400
VI = -26 to -32 V, TJ = 25°C
200
IO = 5 mA to 1.5 A, TJ = 25°C
400
IO = 250 to 750 mA, TJ = 25°C
200
mV
mV
TJ = 25°C
3
IO = 5 mA to 1 A
0.5
VI = -24 to -35 V
1
mA
mA
Output voltage drift
IO = 5 mA
-1.1
mV/°C
Output noise voltage
B = 10Hz to 100kHz, TJ = 25°C
350
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
0.9
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.
10/24
L79xxC
Table 11.
Symbol
Electrical characteristics
Electrical characteristics of L7924C (refer to the test circuits, TJ = 0 to 125 °C, VI = -33 V,
IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified)
Parameter
Test conditions
VO
Output voltage
TJ = 25°C
VO
Output voltage
IO = -5 mA to -1 A, PO ≤15 W
VI = -27 to -38 V
ΔVO(1)
Line regulation
ΔVO(1)
Load regulation
Id
ΔId
ΔVO/ΔT
Quiescent current
Quiescent current change
Max.
Unit
-23
-24
-24.5
V
-22.8
-24
-25.2
V
480
VI = -30 to -36 V, TJ = 25°C
240
IO = 5 mA to 1.5 A, TJ = 25°C
480
IO = 250 to 750 mA, TJ = 25°C
240
mV
mV
TJ = 25°C
3
IO = 5 mA to 1 A
0.5
VI = -27 to -38 V
1
IO = 5 mA
Output noise voltage
B = 10Hz to 100kHz, TJ = 25°C
Supply voltage rejection
ΔVI = 10 V, f = 120Hz
Vd
Dropout voltage
IO = 1 A, TJ = 25°C, ΔVO = 100 mV
Isc
Short circuit current
SVR
Typ.
VI = -27 to -38 V, TJ = 25°C
Output voltage drift
eN
Min.
mA
mA
54
-1
mV/°C
400
µV
60
dB
1.1
V
1.1
A
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.
11/24
Application information
6
Application information
Figure 4.
Fixed output regulator
L79xxC
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.
12/24
L79xxC
Figure 6.
Application information
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
13/24
Package mechanical data
7
L79xxC
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
14/24
L79xxC
Package mechanical data
TO-3 mechanical data
mm.
Dim.
Min.
A
inch.
Typ.
Max.
Min.
Typ.
11.85
B
0.96
Max.
0.466
1.05
1.10
0.037
0.041
0.043
C
1.70
0.066
D
8.7
0.342
E
20.0
0.787
G
10.9
0.429
N
16.9
0.665
P
26.2
R
3.88
1.031
4.09
U
0.152
39.5
V
1.555
30.10
1.185
A
P
D
C
O
N
B
V
E
G
U
0.161
R
P003C/C
15/24
Package mechanical data
L79xxC
TO-220 (A type) mechanical data
Dim.
mm.
Min.
Typ.
inch.
Max.
Min.
Typ.
Max.
A
4.40
4.60
0.173
0.181
b
0.61
0.88
0.024
0.035
b1
1.15
1.70
0.045
0.067
c
0.49
0.70
0.019
0.028
D
15.25
15.75
0.600
0.620
E
10.0
10.40
0.394
0.409
e
2.4
2.7
0.094
0.106
e1
4.95
5.15
0.195
0.203
F
1.23
1.32
0.048
0.052
H1
6.2
6.6
0.244
0.260
J1
2.40
2.72
0.094
0.107
L
13.0
14.0
0.512
0.551
L1
3.5
3.93
0.138
0.155
L20
16.4
0.646
L30
28.9
1.138
φP
3.75
3.85
0.148
0.152
Q
2.65
2.95
0.104
0.116
0015988/N
16/24
L79xxC
Package mechanical data
TO-220FP mechanical data
Dim.
mm.
Min.
A
4.40
Typ
inch.
Max.
Min.
Typ.
Max.
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
0.409
L2
L3
16
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
17/24
Package mechanical data
Figure 8.
L79xxC
Drawing dimension D2PAK (type STD-ST)
0079457/L
18/24
L79xxC
Figure 9.
Package mechanical data
Drawing dimension D2PAK (type WOOSEOK-subcon.)
0079457/L
19/24
Package mechanical data
Table 12.
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
20/24
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.
L79xxC
Package mechanical data
Figure 10. D2PAK footprint recommended data
Table 13.
Footprint data
Values
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
21/24
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
L79xxC
Revision history
8
Revision history
Table 14.
Document revision history
Date
Revision
Changes
22-Jun-2004
9
Order Codes updated Table 3, pag. 3.
31-Aug-2005
10
Add new order codes (TO-220 E Type) on Table 3, pag. 3.
19-Jan-2007
11
D2PAK mechanical data has been updated, add footprint data and the
document reformatted.
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.
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L79xxC
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