STMICROELECTRONICS LM236D

LM236-LM336
2.5V voltage references
Features
●
Low temperature coefficient
●
Wide operating current of 400µA to 10mA
●
0.2Ω dynamic impedance
●
Guaranteed temperature stability
●
Fast turn-on
TO92
(Plastic package)
Description
SO8
(Plastic micropackage)
The LM236 and LM336 are precision 2.5V
regulator diodes. These voltage reference
monolithic ICs operate like 2.5V Zener diodes
with a low temperature coefficient and a dynamic
impedance of 0.2Ω. A third pin enables adjusting
the reference voltage and the temperature
coefficient.
Pin connections
TO92
(Bottom view)
v+
ADJ
v-
SO8
(Top view)
V+
8
1
NC
May 2007
Rev 3
NC
7
2
NC
NC
ADJ
3
4
6
NC
5
V+
1- NC
2- NC
3- NC
4- V5- ADJ
6- NC
7- NC
8- V+
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Schematic diagram
1
Schematic diagram
Figure 1.
2
LM236-LM336
Schematic diagram
Absolute maximum ratings
Table 1.
Absolute maximum ratings (AMR)
Symbol
IR
IF
2/15
Parameter
LM236
LM336,B
Current
Reverse
Forward
Toper
Operating free-air temperature range
Tstg
Storage temperature range
mA
15
10
-25 to +85
Unit
0 to +70
-65 to +150
°C
°C
LM236-LM336
Electrical characteristics
3
Electrical characteristics
Table 2.
Electrical characteristics
LM236
Symbol
LM336,B
Parameter
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
2.44
2.49
2.54
2.39
2.44
2.49
2.49
2.59
2.54
V
VR
Reference breakdown voltage
Tamb = +25°C, IR = 1mA
LM236, LM336
LM336B
ΔVR
Reverse breakdown voltage change with current
400µA ≤ IR ≤ 10mA
Tamb = +25°C
Tmin ≤ Tamb ≤ Tmax
2.6
3
6
10
2.6
3
10
12
mV
ZD
Reverse dynamic impedance (IR = 1mA)
Tamb = +25°C
Tmin ≤ Tamb ≤ Tmax
0.2
0.4
0.6
1
0.2
0.4
1
1.4
Ω
KVT
Temperature stability (VR = 2.49V, IR = 1mA)
3.5
9
1.8
6
mV
KVH
Long term stability (Tamb = +25°C ±0.1°C, IR= 1mA)
20
Reverse voltage change
Figure 3.
ppm
Zener noise voltage
Noise (nV/√Hz)
Reverse voltage change (mV)
Figure 2.
20
Reverse current (mA)
Frequency (Hz)
3/15
Electrical characteristics
Dynamic impedance
Figure 5.
Time (µs)
Frequency (Hz)
Reverse characteristics
Reverse voltage (V)
Temperature drift
Reverse voltage (V)
Figure 8.
Temperature (°C)
4/15
Figure 7.
Forward characteristics
Forward voltage (V)
Reverse current (mA)
Figure 6.
Response time
Voltage swing (V)
Dynamic impedance (Ohm)
Figure 4.
LM236-LM336
Forward current (mA)
LM236-LM336
4
Application information
Application information
The LM236, LM336 voltage references are easier to use than zener diodes. Their low
impedance and wide current range facilitate biasing in any circuits. Besides, the breakdown
voltage or the temperature coefficient can be adjusted so as to optimize the performance of
the circuit.
Figure 9 represents a LM336 with a 10kΩ potentiometer to adjust the reverse breakdown
voltage which can be adjusted without altering the temperature coefficient of the circuit. The
adjustment range is generally sufficient to adjust the initial tolerance of the circuit and the
inaccuracy of the amplifier circuit.
To obtain a lower temperature coefficient two diodes can be connected in series as
indicated in Figure 10.
When the circuit is adjusted to 2.49V the temperature coefficient is minimized.
For a correct temperature coefficient, the diodes should be at the same ambient
temperature as the LM336. The value of R1 is not critical (2-20kΩ).
Figure 9.
LM336 with pot for adjustment of
breakdown voltage
Figure 10. Temperature coefficient adjustment
5/15
Application information
LM236-LM336
Typical applications
Figure 11. 2.5V reference
Figure 12. Wide input range reference
Figure 13. Precision power regulator with low temperature coefficient
6/15
LM236-LM336
Application information
Figure 14. Adjustable shunt regulator
Figure 15. Linear ohmmeter
7/15
Application information
Figure 16. Bipolar output reference
Figure 17. 5V buffered reference
8/15
LM236-LM336
LM236-LM336
Application information
Figure 18. Low noise buffered reference
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Package information
5
LM236-LM336
Package information
In order to meet environmental requirements, STMicroelectronics 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 STMicroelectronics
trademark. ECOPACK specifications are available at: www.st.com.
10/15
LM236-LM336
5.1
Package information
SO-8 package mechanical data
Dimensions
Ref.
Millimeters
Min.
Typ.
A
Inches
Max.
Min.
Typ.
1.75
0.069
A1
0.10
A2
1.25
b
0.28
0.48
0.011
0.019
c
0.17
0.23
0.007
0.010
D
4.80
4.90
5.00
0.189
0.193
0.197
H
5.80
6.00
6.20
0.228
0.236
0.244
E1
3.80
3.90
4.00
0.150
0.154
0.157
e
0.25
Max.
0.004
0.010
0.049
1.27
0.050
h
0.25
0.50
0.010
0.020
L
0.40
1.27
0.016
0.050
k
1°
8°
1°
8°
ccc
0.10
0.004
11/15
Package information
5.2
LM236-LM336
TO-92 ammopack and tape & reel package mechanical data
A1
P
T
P
A
H
W2
W0
W
W1
H0
I1
H
L1
H1
d
D0
F1 F2
P2
P0
Millimeters
Inches
Dim.
Min.
Typ.
Min.
Typ.
Max.
AL
5.0
0.197
A
5.0
0.197
T
4.0
0.157
d
0.45
0.018
I1
2.5
P
11.7
12.7
13.7
0.461
0.500
0.539
PO
12.4
12.7
13
0.488
0.500
0.512
P2
5.95
6.35
6.75
0.234
0.250
0.266
F1/F2
2.4
2.5
2.8
0.094
0.098
0.110
Δh
-1
0
1
-0.039
0
0.039
ΔP
-1
0
1
-0.039
0
0.039
W
17.5
18.0
19.0
0.689
0.709
0.748
W0
5.7
6
6.3
0.224
0.236
0.248
W1
8.5
9
9.75
0.335
0.354
0.384
0.098
W2
0.5
0.020
H
20
0.787
H0
15.5
16
H1
DO
L1
12/15
Max.
16.5
0.610
0.630
25
3.8
4.0
4.2
11
0.650
0.984
0.150
0.157
0.165
0.433
LM236-LM336
5.3
Package information
TO-92 bulk package mechanical data
Millimeters
Inches
Dim.
Min.
L
Typ.
Max.
Min.
1.27
Typ.
Max.
0.05
B
3.2
3.7
4.2
0.126
0.1457
0.1654
O1
4.45
5.00
5.2
0.1752
0.1969
0.2047
C
4.58
5.03
5.33
0.1803
0.198
0.2098
K
12.7
O2
0.407
0.0197
0.02
a
0.35
0.5
0.5
0.508
0.016
0.0138
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Ordering information
6
LM236-LM336
Ordering information
Table 3.
Order codes
Temperature
range
Package
Packing
Marking
LM236D/DT
-25°C to +85°C
SO-8
Tube or
Tape & reel
LM236
LM236Z/ZT/AP
-25°C to +85°C
TO-92
Bulk or
Tape & reel or
Ammopack
LM236
LM336D/DT
-25°C to +85°C
SO-8
Tube or
Tape & reel
LM336
LM336Z/ZT/AP
-25°C to +85°C
TO-92
Bulk or
Tape & reel or
Ammopack
LM336
LM336BD/BDT
0°C to 70°C
SO-8
Tube or
Tape & reel
LM336B
LM336BZ/BZT/BAP
0°C to 70°C
TO-92
Bulk or
Tape & reel or
Ammopack
LM336B
Part number
7
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Revision history
Date
Revision
Changes
2-May-1997
1
Initial release.
24-May-2003
2
Caption of pinout diagram for TO-92 package changed to indicate top
view.
29-May-2007
3
Corrected caption of pinout diagram for TO-92 package on cover
page (previous version is wrong, should be bottom view).
Updated Section 5: Package information and Table 3: Order codes.
LM236-LM336
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