The LM136-5.0/LM236-5.0/MC336-5.0 integrated circuits are precision 5.0V shunt regulator diodes. These monolithic IC
voltage references operate as a low temperature coefficient 5.0V zener with 0.6& 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 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 temperature
range. The MC336-5.0 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
Connection Diagrams
Adjustable 4V to 6V
Low temperature coefficient
Wide operating current of 600 µA to 10 mA
0.6& dynamic impedance
±
1% initial tolerance available
Guaranteed temperature stability
Easily trimmed for minimum temperature drift
Fast turn-on
Three lead transistor package
Bottom View
Order Number MC336Z-5.0 or MC336BZ-5.0
See NS Package Number Z03A
Order Number MC336M-5.0 or MC336BM-5.0
See NS Package Number M08A
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
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MC336-5.0
Typical Applications
Trimmed 4V to 6V Reference
with Temperature Coefficient
Independent of Breakdown Voltage
5.0V Reference with Minimum
Temperature Coefficient
* Does not affect temperature coefficient
†
Adjust to 5.00V
* Any silicon signal diode
Absolute Maximum Ratings
(Note 1)
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Beijing Microcell Microelectronics Co.,Ltd.
MC336-5.0
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
MC336-5.0
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 soldering
surface mount devices.
Electrical Characteristics
(Note 3)
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, T
j
max is:
LM136 150°C
LM236 125°C
MC336 100°C
Note 3:
Unless otherwise specified, the LM136-5.0 is specified from
−55°CδT
A
δ+125°C,
the LM236-5.0 from
−25°CδT
A
δ+85°C
and the MC336-5.0 from
0°CδT
A
δ+70°C.
Note 4:
Temperature stability for the MC336 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
V
REF
from 25°C to T
A
(min) or T
A
(max).
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MC336-5.0
Typical Performance Characteristics
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MC336-5.0
Typical Performance Characteristics
(Continued)
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 temperature
coefficient can be adjusted to optimize circuit performance.
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 signal
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 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
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