STMicroelectronics LM2931BZ50R Very low drop voltage regulators with inhibit function Datasheet

LM2931XX - LM2931AXX33
LM2931AXX50 - LM2931BXX50
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 & 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
TO-92
SO-8
Description
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 battery
powered systems. In the 8 pin configuration (SO8), fully compatible to the older L78Lxx family, a
shut down logic control function is available.
board in stand-by decreasing the total power
consumption. Ideal for automotive application the
LM2931xx is protected from reverse battery
installations or 2 battery jumps. During the
transient, such as a a load dump (60 V) when the
input voltage can exceed the specified maximum
operating input voltage (26 V), the regulator will
automatically shut down to protect both internal
circuit and the load.
This means that when the device is used as a
local regulator is possible to put a part of the
Table 1.
Device summary
Order codes
Packages
DPAK
LM2931ADT50R
TO-92 (BAG)
Output voltage
TO-92 (Ammopak) (1)
SO-8
LM2931AZ33R
LM2931AD33R
3.3 V
LM2931AZ50R
LM2931AD50R
5.0 V
LM2931BD50R
5.0 V
LM2931D-R
2.5 to 26 V
LM2931BZ50R
LM2931BZ50AP
1. Please note that in these cases pins are shaped according to tape & reel specifications.
July 2008
Rev 18
1/23
www.st.com
23
Contents
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
Contents
1
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Truth tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5
Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6
Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8
Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
9
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2/23
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
1
Diagram
Figure 1.
Schematic diagram
Diagram
3/23
Pin configuration
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
2
Pin configuration
Figure 2.
Pin connections (top view)
DPAK
SO-8
PIN 1 = VOUT
PIN 2 = GND
PIN 3 = VIN
TO-92
4/23
BOTTOM VIEW
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
3
Maximum ratings
Maximum ratings
Table 2.
Absolute maximum ratings
Symbol
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
Parameter
RthJC
Thermal resistance junction-case
RthJA
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.
5/23
Application circuits
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
4
Application circuits
Figure 3.
Application circuit for fixed output
Figure 4.
Application circuit for adjustable output
R1 suggested value = 27 kΩ
VO = VREF (R1 + R2)/R1
6/23
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
Electrical characteristics
5
Electrical characteristics
Table 4.
Electrical characteristics of LM2931Axx33 (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).
Symbol
Parameter
Min.
Typ.
26
37
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
VI
Maximum operating input
voltage
VO
Output voltage
VO
Output voltage
ΔVO
Line regulation
ΔVO
Load regulation
Vd
Id
ISC
Dropout voltage (1) (2)
Test conditions
IO = 10 mA, TJ = -40 to 125°C
IO = 100 mA, VI = 6 to 26 V
TJ = -40 to 125°C
Short circuit current
Max.
Unit
V
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.
7/23
Electrical characteristics
Table 5.
Symbol
Electrical characteristics of 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).
Parameter
Min.
Typ.
26
37
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
VI
Maximum operating input
voltage
VO
Output voltage
VO
Output voltage
ΔVO
Line regulation
ΔVO
Load regulation
Vd
Id
ISC
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
Dropout voltage (1) (2)
Test conditions
IO = 10 mA, TJ = -40 to 125°C
IO = 100 mA, VI = 6 to 26 V
TJ = -40 to 125°C
Short circuit current
Max.
Unit
V
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
V
V
50
µA
V
500
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.
8/23
1.2
µVRMS
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
Table 6.
Symbol
Electrical characteristics of LM2931Bxx50 (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).
Parameter
Min.
Typ.
26
37
4.75
5
5.25
V
4.5
5
5.5
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
VI
Maximum operating input
voltage
VO
Output voltage
VO
Output voltage
ΔVO
Line regulation
ΔVO
Load regulation
Vd
Id
ISC
Electrical characteristics
Dropout voltage (1) (2)
Test conditions
IO = 10 mA, TJ = -40 to 125°C
IO = 100 mA, VI = 6 to 26 V
TJ = -40 to 125°C
Short circuit current
Max.
Unit
V
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
1.2
2
22
V
V
50
µA
V
500
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.
9/23
Electrical characteristics
Table 7.
Symbol
VI
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
Electrical characteristics of LM2931xx (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).
Parameter
Maximum operating input
voltage
Test conditions
IO = 10 mA, TJ = -40 to 125°C
Min.
Typ.
Max.
Unit
26
37
1.14
1.2
1.26
V
1.08
1.2
1.32
V
V
VREF
Reference voltage (1)
VREF
Reference voltage
(1)
ΔVO
Line regulation
VI = 3.6 to 26 V
0.6
4.5
mV
ΔVO
Load regulation
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
Vd
Id
ISC
Dropout voltage (1) (2)
IO = 100 mA, TJ = -40 to 125°C
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
2
22
V
V
50
µA
V
330
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.
10/23
1.2
µVRMS
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
Typical characteristics
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
Line regulation vs temperature
11/23
Typical characteristics
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
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
12/23
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
Typical characteristics
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
13/23
Typical characteristics
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
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
14/23
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
7
Package mechanical data
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.
15/23
Package mechanical data
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
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
16/23
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
Package mechanical data
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
17/23
Package mechanical data
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
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
18/23
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
Package mechanical data
Tape & reel DPAK-PPAK mechanical data
mm.
inch.
Dim.
Min.
Typ.
A
Max.
Min.
Typ.
330
13.0
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
13.2
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
19/23
Package mechanical data
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
Tape & reel SO-8 mechanical data
mm.
inch.
Dim.
Min.
A
Max.
Min.
330
13.2
Typ.
Max.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
20/23
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
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
Package mechanical data
Tape & reel for TO-92 mechanical data
Dim.
A1
T
T1
T2
d
P0
P2
F1, F2
delta H
W
W0
W1
W2
H
H0
H1
D0
t
L1
delta P
u
Φ1
Φ2
mm.
Min.
inch.
Typ.
Max.
Min.
4.80
3.80
1.60
2.30
0.48
12.5
5.65
2.44
17.5
5.7
8.5
Typ.
Max.
0.189
0.150
0.063
0.091
0.019
2.54
±2
18.00
0.50
18.50
15.50
12.9
7.05
2.94
0.492
0.222
0.096
19.0
6.3
9.25
0.689
0.224
0.335
0.508
0.278
0.116
0.100
0.079
0.709
0.748
0.248
0.364
0.20
0.728
18.70
16.50
0.610
4.2
0.150
25.00
0.726
0.650
0.984
3.8
0.90
3
±1
50
360
30
0.165
0.035
0.118
0.039
1.968
14.173
1.181
delta P
T
A1
T2
H1
T1
delta H
H
H0
d
L
W2
l1
W0 W
W1
F1 F2
D0
P2
t
P0
DRAWING NOT IN SCALE
21/23
Revision history
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
8
Revision history
Table 8.
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.
22/23
Changes
LM2931XX - LM2931AXX33 - LM2931AXX50 - LM2931BXX50
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