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
1/16
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
2/16
DocID018817 Rev 4
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.
DocID018817 Rev 4
3/16
16
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) / [Vk@25°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.
DocID018817 Rev 4
5/16
16
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)
DocID018817 Rev 4
7/16
16
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
8/16
DocID018817 Rev 4
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°
DocID018817 Rev 4
9/16
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°
DocID018817 Rev 4
11/16
16
Packaging mechanical data
6
LM4041
Packaging mechanical data
Figure 11. Tape and reel SOT23-3L and SOT323-5L mechanical drawing
12/16
DocID018817 Rev 4
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
DocID018817 Rev 4
13/16
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
15/16
16
LM4041
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
All ST products are sold pursuant to ST’s terms and conditions of sale.
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
ST PRODUCTS ARE NOT DESIGNED OR AUTHORIZED FOR USE IN: (A) SAFETY CRITICAL APPLICATIONS SUCH AS LIFE
SUPPORTING, ACTIVE IMPLANTED DEVICES OR SYSTEMS WITH PRODUCT FUNCTIONAL SAFETY REQUIREMENTS; (B)
AERONAUTIC APPLICATIONS; (C) AUTOMOTIVE APPLICATIONS OR ENVIRONMENTS, AND/OR (D) AEROSPACE APPLICATIONS
OR ENVIRONMENTS. WHERE ST PRODUCTS ARE NOT DESIGNED FOR SUCH USE, THE PURCHASER SHALL USE PRODUCTS AT
PURCHASER’S SOLE RISK, EVEN IF ST HAS BEEN INFORMED IN WRITING OF SUCH USAGE, UNLESS A PRODUCT IS
EXPRESSLY DESIGNATED BY ST AS BEING INTENDED FOR “AUTOMOTIVE, AUTOMOTIVE SAFETY OR MEDICAL” INDUSTRY
DOMAINS ACCORDING TO ST PRODUCT DESIGN SPECIFICATIONS. PRODUCTS FORMALLY ESCC, QML OR JAN QUALIFIED ARE
DEEMED SUITABLE FOR USE IN AEROSPACE BY THE CORRESPONDING GOVERNMENTAL AGENCY.
Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2014 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
16/16
DocID018817 Rev 4