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LM4041
Precision micropower shunt voltage reference
Datasheet - production data
Description
SOT23-3L
The LM4041 is a micropower shunt voltage
reference, providing a stable 1.225 V output
voltage, with an initial accuracy of 0.1% @ 25 °C
and a low temperature coefficient. Available in
SOT323-5L and SOT23-3L surface mount
packages, it can be designed in applications
where space saving is a critical issue. The low
operating current is a key advantage for power
restricted designs. In addition, the LM4041 is very
stable and can be used in a broad range of
application conditions.
SOT323-5L
Features
• Fixed 1.225 V typical output voltage
• Ultra low operating current: 40 µA at 25 °C
• High precision: +/- 0.1% @ 25 °C (0.2%, 0.5%
and 1% versions are also available)
• Stable when used with capacitive loads
• Industrial (- 40 to+ 85 °C) and Extended (- 40
to +125 °C) temperature range versions
available
• 100 ppm/°C maximum temperature coefficient
• Available in SOT23-3L and SOT323-5L
packages
Applications
• Computers
• Battery chargers
• Switch mode power supply
• Battery operated equipment
• Data acquisition systems
• Energy management
• Instrumentation
February 2014
This is information on a product in full production.
DocID018817 Rev 4
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www.st.com
Contents
LM4041
Contents
1
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6
Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7
Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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LM4041
1
Pin configuration
Pin configuration
Figure 1. Pin connection (top view)
$0Y
$0Y
627/
Note:
627/
Below pins must be left floating or connected to Anode pin to improve noise immunity due to
PCB layout.
SOT23-3L: pin 3.
SOT323-5L: pin 2, pin 4 and pin 5.
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Maximum ratings
2
LM4041
Maximum ratings
Table 1. Absolute maximum ratings
Symbol
Parameter
Value
Unit
IK
Reverse breakdown current
20
mA
VK
Maximum cathode voltage
8
V
IF
Forward current
10
mA
500
536
mW
- 65 to +150
°C
2
kV
Machine model (MM)
200
V
Charged device model
1500
V
Lead temperature (soldering) 10 sec
260
°C
Max junction temperature
+150
°C
PD
TSTG
Power dissipation
SOT23-3L
SOT323-5L
(1)
Storage temperature
Human body model (HBM)
ESD
TLEAD
TJ
1. PD has been calculated with TAMB = 25°C and TJMAX = 150 °C.
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
Table 2. Thermal data
Symbol
Parameter
SOT323-5L
SOT23-3L
Unit
RthJA
Thermal resistance junction-ambient
233
248
°C/W
RthJC
Thermal resistance junction-case
90
136
°C/W
Value
Unit
Table 3. Operating conditions
Symbol
Parameter
IKMIN
Minimum operating current
40
µA
IKMAX
Maximum operating current
12
mA
TOPER
Operating free air temperature range
4/16
DocID018817 Rev 4
Industrial
- 40 to + 85
Extended
- 40 to + 125
°C
LM4041
3
Electrical characteristics
Electrical characteristics
TAMB = 25 °C, unless otherwise specified.
Table 4. Electrical characteristics
Symbol
Parameter
Vk
Reverse breakdown
voltage
Ikmin
Minimum operating
current
ΔVk/ΔT
Average temperature
coefficient (2)
ΔVk/ΔIk
Reverse breakdown
voltage change with
operating current range
Test conditions
Ik = 100 µA
LM4041A, 0.1%
LM4041B, 0.2%
LM4041C, 0.5%
LM4041D, 1%
1.2238
1.2225
1.219
1.213
Tamb = 25 °C
-40 °C < Tamb < Tmax
Min.
Typ.
1.225
25
Max.
1.2262
1.2275
1.231
1.237
V
40
µA
(1)
50
Ik = 100 µA
± 36
± 100
Ikmin < Ik < 1 mA
- 40 °C < Tamb < Tmax (1)
0.4
1
1.5
4
8
10
1
1 mA < Ik < 12 mA
- 40 °C < Tamb < Tmax (1)
Unit
ppm/°C
mV
Rka
Static impedance
ΔIk = 100 µA to 1 mA
0.4
Kvh
Long term stability
Ik = 100 µA, t = 1000 hrs
120
ppm
en
Wide band noise
Ik = 100 µA, 10 Hz < f < 10 kHz
60
µVRMS
W
1. Tmax = 85 °C for LM4041xI (industrial version) and Tmax = 125 °C for LM4041xE (extended version).
2. The average temperature coefficient is defined as: 106 x {max(ΔVk) / [[email protected]°C x (Tmax-Tmin)]} [ppm/°C].
Note:
Limits are 100% production tested at 25 °C. Limits over temperature are guaranteed
through correlation and by design.
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Typical performance characteristics
4
LM4041
Typical performance characteristics
The following plots are referred to the typical application circuit and, unless otherwise noted,
at TA = 25 °C.
Figure 2. Vk change vs. temperature
Figure 3. Minimum current for regulation
Reverse current I K (µA)
AM09372v1
AM09371v1
1240
1235
VK (mV)
1230
1225
1220
1215
70
50
30
1210
-40
-20
0
25
50
85
105
125
TEMP (° C)
10
0.4
Figure 4. Output impedance vs. frequency
0.8
VK (V)
1.2
Figure 5. Minimum current for regulation vs.
temperature
AM09373v1
1000
AM09374v1
60
Theoric C=1µF
50
C= 0
40
IKMIN (µA)
Impedance (Ohm)
100
10
I = 150µA
CL=1µF
20
1
10
0
I = 1mA
0.1
100
6/16
30
-40
1000
10000
Frequency (Hz)
100000
1000000
DocID018817 Rev 4
-20
0
25
50
TEMP (° C)
85
105
125
LM4041
Typical performance characteristics
Figure 6. Startup characteristics
Figure 7. Startup measure circuit
R
18 K
IK
VK
Pulse
Generator
f=100 KHz
AM09375v1
Figure 8. Wideband noise voltage
AM09376v1
1200
Noise [nV/sqr (Hz)]
1000
800
600
400
200
0
10
100
1000
10000
100000
Frequency (Hz)
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Package mechanical data
5
LM4041
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.
Figure 9. SOT23-3L dimensions
7110469_B
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LM4041
Package mechanical data
Table 5. SOT23-3L mechanical data
mm.
Dim.
Min.
Typ.
Max.
A
0.89
1.12
A1
0.01
0.10
A2
0.88
b
0.30
0.50
c
0.08
0.20
D
2.80
E
2.10
E1
1.20
0.95
2.90
1.30
0.95
e1
1.90
0.40
0.50
L1
k
3.04
2.64
e
L
1.02
1.40
0.60
0.54
0°
8°
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16
Package mechanical data
LM4041
Figure 10. SOT323-5L dimensions
7091413/E
10/16
DocID018817 Rev 4
LM4041
Package mechanical data
Table 6. SOT323-5L mechanical data
mm.
Dim.
Min.
Typ.
Max.
A
0.80
1.10
A1
0
0.10
A2
0.80
b
0.15
0.30
c
0.10
0.22
D
1.80
2
2.20
E
1.80
2.10
2.40
E1
1.15
1.25
1.35
0.90
e
0.65
e1
1.30
L
0.26
<
0°
0.36
1
0.46
8°
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16
Packaging mechanical data
6
LM4041
Packaging mechanical data
Figure 11. Tape and reel SOT23-3L and SOT323-5L mechanical drawing
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LM4041
Packaging mechanical data
Table 7. Tape and reel SOT23-3L mechanical data
mm
Dim.
Min.
Typ.
A
Max.
180
C
12.8
D
20.2
N
60
13.0
T
13.2
14.4
Ao
3.13
3.23
3.33
Bo
3.07
3.17
3.27
Ko
1.27
1.37
1.47
Po
3.9
4.0
4.1
P
3.9
4.0
4.1
Table 8. SOT323-5L mechanical data
mm.
Dim.
Min.
Typ.
Max.
A
175
180
185
C
12.8
13
13.2
D
20.2
N
59.5
60
60.5
T
14.4
Ao
2.25
Bo
2.7
Ko
1.2
Po
3.9
4
4.1
P
3.8
4
4.2
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16
Order codes
7
LM4041
Order codes
Table 9. Order codes
Order codes
Precision
LM4041AICT-1.2
0.1%
LM4041BICT-1.2
0.2%
Packages
Operating temperature range
Marking
L2
SOT323-5L
Industrial
- 40 to + 85 °C
L2
LM4041CICT-1.2
0.5%
LM4041DICT-1.2
1%
L26
LM4041AILT-1.2
0.1%
L23
LM4041BILT-1.2
0.2%
SOT23-3L
Industrial
- 40 to + 85 °C
L25
L24
LM4041CILT-1.2
0.5%
LM4041DILT-1.2
1%
L26
LM4041AECT-1.2
0.1%
E2
LM4041BECT-1.2
0.2%
SOT323-5L
Extended
- 40 to + 125 °C
L25
E2
LM4041CECT-1.2
0.5%
LM4041DECT-1.2
1%
E26
LM4041AELT-1.2
0.1%
E23
LM4041BELT-1.2
0.2%
SOT23-3L
LM4041CELT-1.2
0.5%
LM4041DELT-1.2
1%
14/16
Extended
- 40 to + 125 °C
E25
E24
E25
E26
DocID018817 Rev 4
LM4041
8
Revision history
Revision history
Table 10. Document revision history
Date
Revision
09-May-2011
1
Initial release.
05-Dec-2011
2
Changed maturity code and updated Table 9 on page 14.
25-Jul-2012
3
Added: marking order codes Table 9 on page 14.
4
Part number LM4041xx changed to LM4041.
Updated Table 1: Absolute maximum ratings, Section 1: Pin configuration and
Section 5: Package mechanical data.
Added Section 6: Packaging mechanical data.
Minor text changes.
18-Feb-2014
Changes
DocID018817 Rev 4
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LM4041
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