LM136-5.0,LM236-5.0,LM336-5.0
LM136-5.0/LM236-5.0/LM336-5.0 5.0V Reference Diode
Literature Number: SNVS750B
LM136-5.0/LM236-5.0/LM336-5.0
5.0V Reference Diode
General Description
The LM136-5.0/LM236-5.0/LM336-5.0 integrated circuits are
precision 5.0V shunt regulator diodes. These monolithic IC
voltage references operate as a low temperature coefficient
5.0V zener with 0.6Ωdynamic impedance. A third terminal
on the LM136-5.0 allows the reference voltage and tempera-
ture coefficient to be trimmed easily.
The LM136-5.0 series is useful as a precision 5.0V low
voltage reference for digital voltmeters, power supplies or op
amp circuitry. The 5.0V makes it convenient to obtain a
stable reference from low voltage supplies. Further, since
the LM136-5.0 operates as a shunt regulator, it can be used
as either a positive or negative voltage reference.
The LM136-5.0 is rated for operation over −55˚C to +125˚C
while the LM236-5.0 is rated over a −25˚C to +85˚C tem-
perature range. The LM336-5.0 is rated for operation over a
0˚C to +70˚C temperature range. See the connection dia-
grams for available packages. For applications requiring
2.5V see LM136-2.5.
Features
nAdjustable 4V to 6V
nLow temperature coefficient
nWide operating current of 600 µA to 10 mA
n0.6Ωdynamic impedance
n±1% initial tolerance available
nGuaranteed temperature stability
nEasily trimmed for minimum temperature drift
nFast turn-on
nThree lead transistor package
Connection Diagrams
TO-92
Plastic Package
00571604
Bottom View
Order Number LM336Z-5.0 or LM336BZ-5.0
See NS Package Number Z03A
TO-46
Metal Can Package
00571605
Bottom View
Order Number LM136H-5.0,
LM136H-5.0/883, LM236H-5.0,
LM136AH-5.0, LM136AH-5.0/883,
or LM236AH-5.0
See NS Package Number H03H
SO Package
00571607
Order Number LM336M-5.0 or LM336BM-5.0
See NS Package Number M08A
June 2005
LM136-5.0/LM236-5.0/LM336-5.0 5.0V Reference Diode
© 2005 National Semiconductor Corporation DS005716 www.national.com
Typical Applications
5.0V Reference
00571601
5.0V Reference with Minimum
Temperature Coefficient
00571615
†Adjust to 5.00V
* Any silicon signal diode
Trimmed 4V to 6V Reference
with Temperature Coefficient
Independent of Breakdown Voltage
00571603
* Does not affect temperature coefficient
LM136-5.0/LM236-5.0/LM336-5.0
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Reverse Current 15mA
Forward Current 10mA
Storage Temperature −60˚C to +150˚C
Operating Temperature Range (Note 2)
LM136-5.0 −55˚C to +150˚C
LM236-5.0 −25˚C to +85˚C
LM336-5.0 0˚C to +70˚C
Soldering Information
TO-92 Package (10 sec.) 260˚C
TO-46 Package (10 sec.) 300˚C
SO Package
Vapor Phase (60 sec.) 215˚C
Infrared (15 sec.) 220˚C
See AN-450 “Surface Mounting Methods and Their Effect on
Product Reliability” (appendix D) for other methods of sol-
dering surface mount devices.
Electrical Characteristics
(Note 3)
LM136A-5.0/LM236A-5.0 LM336B-5.0
Parameter Conditions LM136-5.0/LM236-5.0 LM336-5.0 Units
Min Typ Max Min Typ Max
Reverse Breakdown Voltage T
A
=25˚C, I
R
=1 mA
LM136-5.0/LM236-5.0/LM336-5.0 4.9 5.00 5.1 4.8 5.00 5.2 V
LM136A-5.0/LM236A-5.0, LM336B-5.0 4.95 5.00 5.05 4.90 5.00 5.1 V
Reverse Breakdown Change T
A
=25˚C, 6 12 6 20 mV
With Current 600 µA≤I
R
≤10 mA
Reverse Dynamic Impedance T
A
=25˚C, I
R
=1 mA, f = 100 Hz 0.6 1.2 0.6 2 Ω
Temperature Stability V
R
Adjusted 5.00V
(Note 4) I
R
=1 mA, (Figure 2)
0˚C≤T
A
≤70˚C (LM336-5.0) 4 12 mV
−25˚C≤T
A
≤+85˚C (LM236-5.0) 7 18 mV
−55˚C≤T
A
≤+125˚C (LM136-5.0) 20 36 mV
Reverse Breakdown Change 600 µA≤I
R
≤10 mA 6 17 6 24 mV
With Current
Adjustment Range Circuit of Figure 1 ±1±1V
Reverse Dynamic Impedance I
R
= 1 mA 0.8 1.6 0.8 2.5 Ω
Long Term Stability T
A
=25˚C±0.1˚C, I
R
=1 mA, t = 1000 hrs 20 20 ppm
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
beyond its specified operating conditions.
Note 2: For elevated temperature operation, Tjmax is:
LM136 150˚C
LM236 125˚C
LM336 100˚C
Thermal Resistance TO-92 TO-46 SO-8
θ
ja
(Junction to Ambient) 180˚C/W (0.4" Leads) 440˚C/W 165˚C/W
170˚C/W (0.125"
Leads)
θ
ja
(Junction to Case) N/A 80˚C/W N/A
Note 3: Unless otherwise specified, the LM136-5.0 is specified from −55˚C≤TA≤+125˚C, the LM236-5.0 from −25˚C≤TA≤+85˚C and the LM336-5.0 from
0˚C≤TA≤+70˚C.
Note 4: Temperature stability for the LM336 and LM236 family is guaranteed by design. Design limits are guaranteed (but not 100% percent production tested) over
the indicated temperature and supply voltage ranges. These limits are not used to calculate outgoing quality levels. Stability is defined as the maximum charge in
VREF from 25˚C to TA(min) or TA(max).
LM136-5.0/LM236-5.0/LM336-5.0
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Typical Performance Characteristics
Reverse Voltage Change Zener Noise Voltage
00571617 00571618
Dynamic Impedance Response Time
00571619 00571620
Reverse Characteristics Temperature Drift
00571621 00571622
LM136-5.0/LM236-5.0/LM336-5.0
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Typical Performance Characteristics (Continued)
Forward Characteristics
00571623
Application Hints
The LM136-5.0 series voltage references are much easier to
use than ordinary zener diodes. Their low impedance and
wide operating current range simplify biasing in almost any
circuit. Further, either the breakdown voltage or the tempera-
ture coefficient can be adjusted to optimize circuit perfor-
mance.
Figure 1 shows an LM136-5.0 with a 10k potentiometer for
adjusting the reverse breakdown voltage. With the addition
of R1 the breakdown voltage can be adjusted without affect-
ing the temperature coefficient of the device. The adjustment
range is usually sufficient to adjust for both the initial device
tolerance and inaccuracies in buffer circuitry.
If minimum temperature coefficient is desired, four diodes
can be added in series with the adjustment potentiometer as
shown in Figure 2. When the device is adjusted to 5.00V the
temperature coefficient is minimized. Almost any silicon sig-
nal diode can be used for this purpose such as a 1N914,
1N4148 or a 1N457. For proper temperature compensation
the diodes should be in the same thermal environment as
the LM136-5.0. It is usually sufficient to mount the diodes
near the LM136-5.0 on the printed circuit board. The abso-
lute resistance of the network is not critical and any value
from 2k to 20k will work. Because of the wide adjustment
range, fixed resistors should be connected in series with the
pot to make pot setting less critical.
00571609
FIGURE 1. LM136-5.0 with Pot for Adjustment of
Breakdown Voltage (Trim Range = ±1.0V Typical)
00571610
FIGURE 2. Temperature Coefficient Adjustment
(Trim Range = ±0.5V Typical)
LM136-5.0/LM236-5.0/LM336-5.0
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Typical Applications
Precision Power Regulator with Low Temperature Coefficient
00571611
* Adjust for 6.25V across R1
5V Crowbar
00571612
Adjustable Shunt Regulator
00571613
LM136-5.0/LM236-5.0/LM336-5.0
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Typical Applications (Continued)
Linear Ohmmeter
00571614
Op Amp with Output Clamped
00571624
LM136-5.0/LM236-5.0/LM336-5.0
www.national.com7
Typical Applications (Continued)
Bipolar Output Reference
00571625
5.0V Square Wave Calibrator
00571626
10V Buffered Reference
00571627
LM136-5.0/LM236-5.0/LM336-5.0
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Typical Applications (Continued)
Low Noise Buffered Reference
00571628
Wide Input Range Reference
00571629
LM136-5.0/LM236-5.0/LM336-5.0
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Schematic Diagram
00571616
LM136-5.0/LM236-5.0/LM336-5.0
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Physical Dimensions inches (millimeters)
unless otherwise noted
TO-46 Metal Can Package (H)
Order Number LM136H-5.0, LM136H-5.0/883, LM236H-5.0,
LM136AH-5.0, LM136AH-5.0/883 or LM236AH-5.0
NS Package Number H03H
Small Outline (SO-8) Package
Order Number LM336M-5.0 or LM336BM-5.0
NS Package Number M08A
LM136-5.0/LM236-5.0/LM336-5.0
www.national.com11
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Plastic Package (Z)
Order Number LM336Z-5.0 or LM336BZ-5.0
NS Package Number Z03A
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves
the right at any time without notice to change said circuitry and specifications.
For the most current product information visit us at www.national.com.
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LM136-5.0/LM236-5.0/LM336-5.0 5.0V Reference Diode
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