STMICROELECTRONICS LM2931AXX50

LM2931XX, LM2931AXX33
LM2931AXX50
Very low drop voltage regulators with inhibit function
Features
■
Very low dropout voltage (0.15 V typ. at 10 mA
load)
■
Low quiescent current (typ. 2.5 mA, at 100 mA
load)
■
Output current up to 100 mA
■
Adjustable (from VOUT = 2.5 V only SO-8) and
fixed (3.3 V and 5 V) output voltage version
■
Internal current and thermal limit
■
Load dump protection up to 60 V
■
Reverse transient protection up to -50 V
■
Temperature range: -40 to 125 °C
■
Package available: TO-92, DPAK, SO-8 (with
inhibit control)
DPAK
Description
TO-92
SO-8
input voltage can exceed the specified maximum
operating input voltage of 26 V, the regulator
automatically shuts down to protect both internal
circuitry and the load.
The LM2931xx are very low drop regulators. The
very low drop voltage and the low quiescent
current make them particular suitable for low
noise, low power applications and in batterypowered systems. In the 8-pin configuration (SO8), fully compatible with the older L78Lxx family, a
shutdown logic control function is available.
This means that when the device is used as a
local regulator it is possible to put a part of the
board in standby, decreasing total power
consumption. Ideal for automotive applications,
LM2931xx is protected from reverse battery
installations or 2 battery jumps. During the
transient, such as a 60 V load dump, when the
Table 1.
Device summary
Order codes
Output voltages
DPAK
LM2931ADT50R
May 2010
TO-92 (Bag)
LM2931AZ50R
SO-8
LM2931AD33R
3.3 V
LM2931AD50R
5.0 V
LM2931D-R
2.5 to 26 V
Doc ID 6740 Rev 19
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www.st.com
21
Contents
LM2931XX, LM2931AXX33, LM2931AXX50
Contents
1
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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Doc ID 6740 Rev 19
LM2931XX, LM2931AXX33, LM2931AXX50
1
Diagram
Figure 1.
Schematic diagram
Doc ID 6740 Rev 19
Diagram
3/21
Pin configuration
LM2931XX, LM2931AXX33, LM2931AXX50
2
Pin configuration
Figure 2.
Pin connections (top view)
DPAK
SO-8
PIN 1 = VOUT
PIN 2 = GND
PIN 3 = VIN
TO-92
4/21
BOTTOM VIEW
Doc ID 6740 Rev 19
LM2931XX, LM2931AXX33, LM2931AXX50
3
Maximum ratings
Table 2.
Absolute maximum ratings
Symbol
Maximum ratings
Parameter
Value
Unit
VI
DC positive input voltage
40
V
VI
DC reverse input voltage
-15
V
VI
Transient input voltage (τ < 100 ms)
60
V
VI
Transient reverse input voltage (τ < 100 ms)
-50
V
Inhibit input voltage
40
V
VINH
IO
Output current
Internally limited
TSTG
Storage temperature range
-65 to 150
°C
TOP
Operating junction temperature range
-40 to 125
°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
RthJC
RthJA
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
SO-8
DPAK
20
8
55
(1)
100
TO-92
Unit
°C/W
200
°C/W
1. Considering 6 cm2 of copper board heat-sink.
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Application circuits
LM2931XX, LM2931AXX33, LM2931AXX50
4
Application circuits
Figure 3.
Application circuit for fixed output
Figure 4.
Application circuit for adjustable output
Note:
R1 suggested value = 27 kΩ
VO = VREF (R1 + R2)/R1
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LM2931XX, LM2931AXX33, LM2931AXX50
5
Electrical characteristics
Electrical characteristics
Refer to the application circuit Figure 3, TJ = 25 °C, CI = 0.1 µF, CO = 100 µF, VI = 14 V,
IO = 10 mA, VINH = 0 V, unless otherwise specified.
Table 4.
Symbol
Electrical characteristics of LM2931Axx33
Parameter
VI
Maximum operating input
voltage
VO
Output voltage
VO
Output voltage
ΔVO
Line regulation
ΔVO
Load regulation
Vd
Id
ISC
Test conditions
IO = 10 mA, TJ = -40 to 125°C
Min.
Typ.
Max.
26
Unit
V
3.135
3.3
3.425
V
3.135
3.3
3.465
V
VI = 9 to 16 V
2
10
VI = 6 to 26 V
4
33
IO = 5 to 100 mA
10
33
IO = 10 mA
90
250
IO = 100 mA
250
600
Quiescent current
ON MODE
IO = 100 mA
2.5
30
mA
OFF MODE
VINH = 2.5 V, RLOAD = 330 Ω
0.3
1
mA
Dropout voltage (1) (2)
IO = 100 mA, VI = 6 to 26 V
TJ = -40 to 125°C
Short circuit current
mV
mV
mV
100
300
mA
55
78
dB
SVR
Supply voltage rejection
IO = 100 mA, VI = 14 ± 2 V
f = 120 Hz, TJ = -40 to 125°C
VIL
Control input voltage low
TJ = -40 to 125°C
VIH
Control input voltage high
TJ = -40 to 125°C
IINH
Inhibit input current
VINH = 2.5 V
VI
Transient input voltage
RLOAD = 330 Ω, τ < 100ms
60
70
V
VI
Reverse polarity input
voltage
VO = ± 0.3 V, RLOAD = 330 Ω
-15
-50
V
VI
Reverse polarity input
voltage transient
RLOAD = 330 Ω, τ < 100ms
-50
eN
Output noise voltage
B =10 Hz to 100 kHz
2
3.25
1.2
2
22
V
V
50
µA
V
330
µVRMS
1. Reference voltage is measured from VOUT to ADJ pin.
2. Vd measured when the output voltage has dropped 100 mV from the nominal value obtained at 14 V.
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Electrical characteristics
LM2931XX, LM2931AXX33, LM2931AXX50
Refer to the application circuit Figure 3, TJ = 25 °C, CI = 0.1 µF, CO = 100 µF, VI = 14 V, IO =
10 mA, VINH = 0 V, unless otherwise specified.
Table 5.
Symbol
Electrical characteristics of LM2931Axx50
Parameter
VI
Maximum operating input
voltage
VO
Output voltage
VO
Output voltage
ΔVO
Line regulation
ΔVO
Load regulation
Vd
Id
ISC
Test conditions
IO = 10 mA, TJ = -40 to 125°C
Min.
Typ.
Max.
26
Unit
V
4.81
5
5.19
V
4.75
5
5.25
V
VI = 9 to 16 V
2
10
VI = 6 to 26 V
4
30
IO = 5 to 100 mA
15
50
IO = 10 mA
90
200
IO = 100 mA
250
600
Quiescent current
ON MODE
IO = 100 mA
2.5
30
mA
OFF MODE
VINH = 2.5 V, RLOAD = 500 Ω
0.3
1
mA
Dropout voltage (1) (2)
IO = 100 mA, VI = 6 to 26 V
TJ = -40 to 125°C
Short circuit current
mV
mV
mV
100
300
mA
55
75
dB
SVR
Supply voltage rejection
IO = 100 mA, VI = 14 ± 2 V
f = 120 Hz, TJ = -40 to 125°C
VIL
Control input voltage low
TJ = -40 to 125°C
VIH
Control input voltage high
TJ = -40 to 125°C
IINH
Inhibit input current
VINH = 2.5 V
VI
Transient input voltage
RLOAD = 500 Ω, τ < 100ms
60
70
V
VI
Reverse polarity input
voltage
VO = ± 0.3 V, RLOAD = 500 Ω
-15
-50
V
VI
Reverse polarity input
voltage transient
RLOAD = 500 Ω, τ < 100ms
-50
eN
Output noise voltage
B =10 Hz to 100 kHz
2
3.25
2
22
500
2. Vd measured when the output voltage has dropped 100 mV from the nominal value obtained at 14 V.
Doc ID 6740 Rev 19
V
V
50
µA
V
1. Reference voltage is measured from VOUT to ADJ pin.
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1.2
µVRMS
LM2931XX, LM2931AXX33, LM2931AXX50
Electrical characteristics
Refer to the application circuit Figure 4 with R1 = 27 KΩ and R2 = 40.5 kΩ, TJ = 25 °C,
CI = 0.1 µF, CO = 100 µF, VI = 14 V, IO = 10 mA, VINH = 0 V, unless otherwise specified.
Table 6.
Symbol
VI
Electrical characteristics of LM2931xx
Parameter
Maximum operating input
voltage
Test conditions
IO = 10 mA, TJ = -40 to 125°C
VREF
Reference voltage (1)
VREF
Reference voltage (1)
IO = 100 mA, TJ = -40 to 125°C
ΔVO
Line regulation
ΔVO
Load regulation
Vd
Id
ISC
Min.
Typ.
Max.
26
Unit
V
1.14
1.2
1.26
V
1.08
1.2
1.32
V
VI = 3.6 to 26 V
0.6
4.5
mV
IO = 5 to 100 mA
9
30
mV
IO = 10 mA
90
200
IO = 100 mA
250
600
Quiescent current
ON MODE
IO = 100 mA
2.5
30
mA
OFF MODE
VINH = 2.5 V, RLOAD = 300 Ω
0.3
1
mA
Dropout voltage (1) (2)
Short circuit current
mV
100
300
mA
55
80
dB
SVR
Supply voltage rejection
IO = 100 mA, VI = 14 ± 2 V
f = 120 Hz, TJ = -40 to 125°C
VIL
Control input voltage low
TJ = -40 to 125°C
VIH
Control input voltage high
TJ = -40 to 125°C
IINH
Inhibit input current
VINH = 2.5 V
VI
Transient input voltage
RLOAD = 300 Ω, τ < 100ms
60
70
V
VI
Reverse polarity input
voltage
VO = ± 0.3 V, RLOAD = 300 Ω
-15
-50
V
VI
Reverse polarity input
voltage transient
RLOAD = 300 Ω, τ < 100ms
-50
eN
Output noise voltage
B = 10 Hz to 100 kHz
2
3.25
1.2
2
22
V
V
50
µA
V
330
µVRMS
1. Reference voltage is measured from VOUT to ADJ pin.
2. Vd measured when the output voltage has dropped 100 mV from the nominal value obtained at 14 V.
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Typical characteristics
LM2931XX, LM2931AXX33, LM2931AXX50
6
Typical characteristics
Figure 5.
Unless otherwise specified CI = 0.1 µF, CO = 100 µF.
Output voltage vs. temperature
Figure 6.
Output voltage vs. temperature
Figure 7.
Reference voltage vs. temperature
Figure 8.
Figure 9.
Load regulation vs. temperature
Figure 10. Dropout voltage vs. temperature
10/21
Doc ID 6740 Rev 19
Line regulation vs. temperature
LM2931XX, LM2931AXX33, LM2931AXX50
Typical characteristics
Figure 11. Dropout voltage vs. temperature
Figure 12. Dropout voltage vs. output current
Figure 13. Output voltage vs. input voltage
Figure 14. Short circuit current vs. drop
voltage
Figure 15. Quiescent current vs. temperature
Figure 16. Quiescent current vs. input voltage
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Typical characteristics
LM2931XX, LM2931AXX33, LM2931AXX50
Figure 17. Quiescent current vs. output
current
Figure 18. Supply voltage rejection vs.
temperature
Figure 19. Supply voltage rejection vs.
frequency
Figure 20. Supply voltage rejection vs. output
current
Figure 21. Stability vs. CO
Figure 22. Line transient
VI = 6 to 20 V, RL = 500 Ω, TJ = 25°C, CI = 0, CO = 100 µF,
Rise Fall-Time = 200 ns
12/21
Doc ID 6740 Rev 19
LM2931XX, LM2931AXX33, LM2931AXX50
Typical characteristics
Figure 23. Line transient
VI = 14 V, IO = 100 mA, TJ = 25°C, CI = 0.1 µF, CO = 100 µF,
Rise Time = 500 ns, Fall-Time = 1 µs
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Package mechanical data
7
LM2931XX, LM2931AXX33, LM2931AXX50
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.
14/21
Doc ID 6740 Rev 19
LM2931XX, LM2931AXX33, LM2931AXX50
Package mechanical data
TO-92 mechanical data
mm.
mils.
Dim.
Min.
Typ.
Max.
Min.
Typ.
Max.
A
4.32
4.95
170.1
194.9
b
0.36
0.51
14.2
20.1
D
4.45
4.95
175.2
194.9
E
3.30
3.94
129.9
155.1
e
2.41
2.67
94.9
105.1
e1
1.14
1.40
44.9
55.1
L
12.7
15.49
500.0
609.8
R
2.16
2.41
85.0
94.9
S1
0.92
1.52
36.2
59.8
W
0.41
0.56
16.1
22.0
α
5°
5°
0102782/D
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Package mechanical data
LM2931XX, LM2931AXX33, LM2931AXX50
DPAK mechanical data
mm.
inch.
Dim.
Min.
A
A1
A2
B
b4
C
C2
D
D1
E
E1
e
e1
H
L
(L1)
L2
L4
R
V2
Typ.
2.2
0.9
0.03
0.64
5.2
0.45
0.48
6
Max.
Min.
2.4
1.1
0.23
0.9
5.4
0.6
0.6
6.2
0.086
0.035
0.001
0.025
0.204
0.017
0.019
0.236
6.6
0.252
5.1
6.4
0.260
0.173
0.368
0.039
2.8
0.8
0.181
0.397
0.110
0.031
1
0.023
0.2
0°
0.094
0.043
0.009
0.035
0.212
0.023
0.023
0.244
0.185
0.090
4.6
10.1
0.6
Max.
0.200
4.7
2.28
4.4
9.35
1
Typ.
0.039
0.008
8°
0°
8°
0068772-F
16/21
Doc ID 6740 Rev 19
LM2931XX, LM2931AXX33, LM2931AXX50
Package mechanical data
SO-8 mechanical data
Dim.
mm.
Min.
Typ.
inch.
Max.
Min.
Typ.
Max.
A
1.35
1.75
0.053
0.069
A1
0.10
0.25
0.04
0.010
A2
1.10
1.65
0.043
0.065
B
0.33
0.51
0.013
0.020
C
0.19
0.25
0.007
0.010
D
4.80
5.00
0.189
0.197
E
3.80
4.00
0.150
0.157
e
1.27
0.050
H
5.80
6.20
0.228
0.244
h
0.25
0.50
0.010
0.020
L
0.40
1.27
0.016
0.050
k
ddd
8° (max.)
0.1
0.04
0016023/C
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Package mechanical data
LM2931XX, LM2931AXX33, LM2931AXX50
Tape & reel DPAK-PPAK mechanical data
mm.
inch.
Dim.
Min.
Typ.
A
Min.
Typ.
330
13.0
13.2
Max.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
18/21
Max.
0.504
0.512
22.4
0.519
0.882
Ao
6.80
6.90
7.00
0.268
0.272
0.2.76
Bo
10.40
10.50
10.60
0.409
0.413
0.417
Ko
2.55
2.65
2.75
0.100
0.104
0.105
Po
3.9
4.0
4.1
0.153
0.157
0.161
P
7.9
8.0
8.1
0.311
0.315
0.319
Doc ID 6740 Rev 19
LM2931XX, LM2931AXX33, LM2931AXX50
Package mechanical data
Tape & reel SO-8 mechanical data
mm.
inch.
Dim.
Min.
A
Typ.
Max.
Min.
330
Max.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
13.2
Typ.
0.504
22.4
0.519
0.882
Ao
8.1
8.5
0.319
0.335
Bo
5.5
5.9
0.216
0.232
Ko
2.1
2.3
0.082
0.090
Po
3.9
4.1
0.153
0.161
P
7.9
8.1
0.311
0.319
Doc ID 6740 Rev 19
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Revision history
LM2931XX, LM2931AXX33, LM2931AXX50
8
Revision history
Table 7.
Document revision history
Date
Revision
21-Jun-2004
12
Document updated.
16-Jun-2006
13
Order codes updated.
27-Jul-2007
14
Added Table 1 in cover page.
21-Aug-2007
15
Added root part number - (see Table 1).
22-Nov-2007
16
Modified: Table 1.
11-Feb-2008
17
Modified: Table 1 on page 1.
10-Jul-2008
18
Removed package TO-220, modified Table 1 on page 1.
26-May-2010
19
Modified: VI values Table 4 on page 7, Table 5 on page 8 and Table 6 on
page 9.
20/21
Changes
Doc ID 6740 Rev 19
LM2931XX, LM2931AXX33, LM2931AXX50
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Doc ID 6740 Rev 19
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