ST LM4041AICT-1.2, LM4041BICT-1.2, LM4041CICT-1.2, LM4041DICT-1.2, LM4041AILT-1.2 User Manual

...
Precision micropower shunt voltage reference
Features
Fixed 1.225 V typical output voltage
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
LM4041xx
Datasheet production data
SOT23-3L
SOT323-5L
Applications
Computers
Battery chargers
Switch mode power supply
Battery operated equipment
Data acquisition systems
Energy management
Instrumentation
Description
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.
July 2012 Doc ID 018817 Rev 3 1/16
This is information on a product in full production.
www.st.com
16
Contents LM4041xx
Contents
1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16 Doc ID 018817 Rev 3
LM4041xx Pin configuration

1 Pin configuration

Figure 1. Pin connection (top view)

AM09377v1
SOT23-3L SOT323-5L
* This pin must be left floating or connected to Anode pin.
AM09
378v1
Doc ID 018817 Rev 3 3/16
Maximum ratings LM4041xx

2 Maximum ratings

Table 1. Absolute maximum ratings

Symbol Parameter Value Unit
Reverse breakdown current 20 mA
Forward current 10 mA
Power dissipation SOT23-3L SOT323-5L
(1)
500 536
mW
Storage temperature - 65 to +150 °C
T
I
K
I
F
P
STG
D
Human Body Model (HBM) 2 kV
ESD
Machine Model (MM) 200 V
Charged Device Model 1500 V
T
LEAD
T
J
1. PD has been calculated with T
Lead temperature (soldering) 10 sec 260 °C
Max junction temperature +150 °C
= 25°C and T
AMB
JMAX
= 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
R
R
thJA
thJC
Thermal resistance junction-ambient 233 248 °C/W
Thermal resistance junction-case 90 136 °C/W

Table 3. Operating conditions

Symbol Parameter Value Unit
I
KMIN
I
KMAX
T
OPER
4/16 Doc ID 018817 Rev 3
Minimum operating current 40 µA
Maximum operating current 12 mA
Industrial - 40 to + 85
Operating free air temperature range
Extended - 40 to + 125
°C
LM4041xx Electrical characteristics

3 Electrical characteristics

T
= 25 °C, unless otherwise specified.
AMB

Table 4. Electrical characteristics

Symbol Parameter Test conditions Min. Typ. Max. Unit
= 100 µA
I
k
ΔV
Vk
I
kmin
/ΔT
k
Reverse breakdown voltage
Minimum operating current
Average temperature coefficient
(2)
LM4041A, 0.1% LM4041B, 0.2% LM4041C, 0.5% LM4041D, 1%
= 25 °C 25 40
T
amb
max
(1)
-40 °C < T
I
= 100 µA ± 36 ± 100 ppm/°C
k
amb
< T
1.2238
1.2225
1.219
1.213
1.225
1.2262
1.2275
1.231
1.237
50
V
µA
< Ik < 1 mA
I
kmin
- 40 °C < T
1 mA < I
ΔV
Reverse breakdown voltage change with
/ΔI
k
k
operating current range
- 40 °C < T
R
K
e
1. T
max
2. The average temperature coefficient is defined as: 10
Static impedance ΔI
ka
Long term stability I
vh
Wide band noise I
n
= 85 °C for LM4041xI (industrial version) and T
= 100 µA to 1 mA 0.4 1 Ω
k
= 100 µA, t = 1000 hrs 120 ppm
k
= 100 µA, 10 Hz < f < 10 kHz 60 µV
k
max
max
(1)
(1)
k@25°C
x (T
max-Tmin
< T
amb
< 12 mA
k
< T
amb
= 125 °C for LM4041xE (extended version).
max
6
x {max(ΔVk) / [V
0.4
4
)]} [ppm/°C].
1
1.5 mV
8
10
RMS
Note: Limits are 100% production tested at 25 °C. Limits over temperature are guaranteed through
correlation and by design.
Doc ID 018817 Rev 3 5/16
Typical performance characteristics LM4041xx

4 Typical performance characteristics

The following plots are referred to the typical application circuit and, unless otherwise noted,
= 25 °C.
at T
A
Figure 2. Vk change vs. temperature Figure 3. Minimum current for regulation
AM09372v1
1240
1235
1230
(mV)
1225
K
V
1220
1215
1210
-40 -20 0 25 50 85 105 125
TEMP (° C)
AM09371v1
70
K
50
30
Reverse current I (µA)
10
0.4 0.8
1.2
VK(V)
Figure 4. Output impedance vs. frequency Figure 5. Minimum current for regulation vs.
1000
Theo ric C= 1µF
100
AM09373v1
C = 0
10
I = 150µA
Impedance (Ohm)
CL=1µF
1
60
50
40
(µA)
30
KMIN
I
20
10
temperature
AM09374v1
I = 1mA
0.1
0
-40 -20 0 25 50 85 105 125
100 1000 10000 100000 1000000
Frequency (Hz)
6/16 Doc ID 018817 Rev 3
TEMP (° C)
LM4041xx Typical performance characteristics
Figure 6. Startup characteristics Figure 7. Startup measure circuit

Figure 8. Wideband noise voltage

1200
1000
AM09376v1
Pulse
Generator
f=100 KHz
R
18 K
I
K
AM09375v1
V
K
800
600
400
Noise [nV /sqr (Hz)]
200
0
10 100 1000 10000 100000
Frequency (Hz)
Doc ID 018817 Rev 3 7/16
Package mechanical data LM4041xx

5 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: ECOPACK is an ST trademark.

Table 5. SOT23-3L mechanical data

Dim.
Min. Typ. Max.
A 0.89 1.12
A1 0.01 0.10
A2 0.88 0.95 1.02
b 0.30 0.50
c 0.08 0.20
D 2.80 2.90 3.04
E 2.10 2.64
E1 1.20 1.30 1.40
e0.95
e1 1.90
mm.
www.st.com
.
L 0.40 0.50 0.60
L1 0.54
k0° 8°
8/16 Doc ID 018817 Rev 3
LM4041xx Package mechanical data

Figure 9. SOT23-3L dimensions

7110469_B
Doc ID 018817 Rev 3 9/16
Package mechanical data LM4041xx

Table 6. SOT323-5L mechanical data

mm.
Dim.
Min. Typ. Max.
A 0.80 1.10
A1 0 0.10
A2 0.80 0.90 1
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
e0.65
e1 1.30
L 0.26 0.36 0.46
<0° 8°
10/16 Doc ID 018817 Rev 3
LM4041xx Package mechanical data

Figure 10. SOT323-5L dimensions

7091413/E
Doc ID 018817 Rev 3 11/16
Package mechanical data LM4041xx
Tape & reel SOT23-xL mechanical data
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A180 7.086
C 12.8 13.0 13.2 0.504 0.512 0.519
D 20.2 0.795
N60 2.362
T 14.4 0.567
Ao 3.133.233.33 0.123 0.127 0.131
Bo 3.07 3.17 3.27 0.120 0.124 0.128
Ko 1.27 1.37 1.47 0.050 0.054 0.0.58
Po 3.9 4.0 4.1 0.153 0.157 0.161
P 3.9 4.0 4.1 0.153 0.157 0.161
12/16 Doc ID 018817 Rev 3
LM4041xx Package mechanical data
Tape & reel SOT323-xL mechanical data
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A 175 1801856.889 7.086 7.283
C 12.8 13 13.2 0.504 0.512 0.519
D 20.2 0.795
N59.5 60 60.5 2.362
T 14.4 0.567
Ao 2.25 0.088
Bo 2.7 0.106
Ko 1.2 0.047
Po 3.9 4 4.1 0.153 0.157 0.161
P 3.8 4 4.2 0.149 0.157 0.165
Doc ID 018817 Rev 3 13/16
Order codes LM4041xx

6 Order codes

Table 7. Order codes

Order codes Precision Packages Operating temperature range Marking
LM4041AICT-1.2 0.1%
LM4041BICT-1.2 0.2% L2
SOT323-5L
LM4041CICT-1.2 0.5% L25
LM4041DICT-1.2 1% L26
LM4041AILT-1.2 0.1%
LM4041BILT-1.2 0.2% L24
SOT23-3L
LM4041CILT-1.2 0.5% L25
LM4041DILT-1.2 1% L26
LM4041AECT-1.2 0.1%
LM4041BECT-1.2 0.2% E2
SOT323-5L
LM4041CECT-1.2 0.5% E25
LM4041DECT-1.2 1% E26
LM4041AELT-1.2 0.1%
LM4041BELT-1.2 0.2% E24
SOT23-3L
LM4041CELT-1.2 0.5% E25
LM4041DELT-1.2 1% E26
Industrial
- 40 to + 85 °C
Industrial
- 40 to + 85 °C
Extended
- 40 to + 125 °C
Extended
- 40 to + 125 °C
L2
L23
E2
E23
14/16 Doc ID 018817 Rev 3
LM4041xx Revision history

7 Revision history

Table 8. Document revision history

Date Revision Changes
09-May-2011 1 Initial release.
05-Dec-2011 2 Changed maturity code and updated
25-Jul-2012 3 Added: marking order codes
Table 7 on page 14
Table 7 on page 14
.
.
Doc ID 018817 Rev 3 15/16
LM4041xx
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16/16 Doc ID 018817 Rev 3
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