LM136-5.0
LM136-5.0 LM236-5.0 LM336-5.0 5.0V Reference Diode
Literature Number: SNVS750C
LM136-5.0
LM236-5.0
LM336-5.0
February 27, 2009
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 0.6Ω dynamic impedance. A third terminal on
the LM136-5.0 allows the reference voltage and temperature
coefficient to be trimmed easily.
The LM136-5.0 series is useful as a precision 5.0V low volt-
age reference for digital voltmeters, power supplies or op amp
circuitry. The 5.0V makes it convenient to obtain a stable ref-
erence 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 temper-
ature range. The LM336-5.0 is rated for operation over a 0°C
to +70°C temperature range. See the connection diagrams
for available packages. For applications requiring 2.5V see
LM136-2.5.
Features
Adjustable 4V to 6V
Low temperature coefficient
Wide operating current of 600 μA to 10 mA
0.6Ω dynamic impedance
± 1% initial tolerance available
Guaranteed temperature stability
Easily trimmed for minimum temperature drift
Fast turn-on
Three lead transistor package
Connection Diagrams
TO-92
Plastic Package
571604
Bottom View
Order Number LM336Z-5.0 or LM336BZ-5.0
See NS Package Number Z03A
TO-46
Metal Can Package
571605
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
571607
Order Number LM336M-5.0 or LM336BM-5.0
See NS Package Number M08A
© 2009 National Semiconductor Corporation 5716 www.national.com
LM136-5.0/LM236-5.0/LM336-5.0 5.0V Reference Diode
Typical Applications
5.0V Reference
571601
5.0V Reference with Minimum
Temperature Coefficient
571615
† Adjust to 5.00V
* Any silicon signal diode
Trimmed 4V to 6V Reference
with Temperature Coefficient
Independent of Breakdown Voltage
571603
* Does not affect temperature coefficient
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LM136-5.0/LM236-5.0/LM336-5.0
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 solder-
ing 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
TA=25°C, IR=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
TA=25°C, 6 12 6 20 mV
With Current 600 μAIR10 mA
Reverse Dynamic
Impedance
TA=25°C, IR=1 mA, f = 100 Hz 0.6 1.2 0.6 2 Ω
Temperature Stability VR Adjusted 5.00V
(Note 4) IR=1 mA, (Figure 2)
0°CTA70°C (LM336-5.0) 4 12 mV
−25°CTA+85°C (LM236-5.0) 7 18 mV
−55°CTA+125°C (LM136-5.0) 20 36 mV
Reverse Breakdown
Change 600 μAIR10 mA 6 17 6 24 mV
With Current
Adjustment Range Circuit of Figure 1 ±1 ±1 V
Reverse Dynamic
Impedance
IR = 1 mA 0.8 1.6 0.8 2.5 Ω
Long Term Stability TA=25°C±0.1°C, IR=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, Tj max is:
LM136 150°C
LM236 125°C
LM336 100°C
Thermal Resistance TO-92 TO-46 SO-8
θja (Junction to Ambient) 180°C/W (0.4″ Leads) 440°C/W 165°C/W
170°C/W (0.125″ Leads)
θja (Junction to Case) N/A 80°C/W N/A
Note 3: Unless otherwise specified, the LM136-5.0 is specified from −55°CTA+125°C, the LM236-5.0 from −25°CTA+85°C and the LM336-5.0 from 0°
CTA+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).
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LM136-5.0/LM236-5.0/LM336-5.0
Typical Performance Characteristics
Reverse Voltage Change
571617
Zener Noise Voltage
571618
Dynamic Impedance
571619
Response Time
571620
Reverse Characteristics
571621
Temperature Drift
571622
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LM136-5.0/LM236-5.0/LM336-5.0
Forward Characteristics
571623
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 temper-
ature 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 affecting
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 absolute re-
sistance 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.
571609
FIGURE 1. LM136-5.0 with Pot for Adjustment of
Breakdown Voltage (Trim Range = ±1.0V Typical)
571610
FIGURE 2. Temperature Coefficient Adjustment
(Trim Range = ±0.5V Typical)
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LM136-5.0/LM236-5.0/LM336-5.0
Typical Applications
Precision Power Regulator with Low Temperature Coefficient
571611
* Adjust for 6.25V across R1
5V Crowbar
571612
Adjustable Shunt Regulator
571613
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LM136-5.0/LM236-5.0/LM336-5.0
Linear Ohmmeter
571614
Op Amp with Output Clamped
571624
Bipolar Output Reference
571625
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LM136-5.0/LM236-5.0/LM336-5.0
5.0V Square Wave Calibrator
571626
10V Buffered Reference
571627
Low Noise Buffered Reference
571628
Wide Input Range Reference
571629
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LM136-5.0/LM236-5.0/LM336-5.0
Schematic Diagram
571616
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LM136-5.0/LM236-5.0/LM336-5.0
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
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LM136-5.0/LM236-5.0/LM336-5.0
Plastic Package (Z)
Order Number LM336Z-5.0 or LM336BZ-5.0
NS Package Number Z03A
11 www.national.com
LM136-5.0/LM236-5.0/LM336-5.0
Notes
LM136-5.0/LM236-5.0/LM336-5.0 5.0V Reference Diode
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