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 0.6

dynamic 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 volt-
age 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

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

Connection Diagrams

TO-92

Plastic Package

DS005716-4

Bottom View

Order Number LM236AZ-5.0, LM336Z-5.0 or LM336BZ-5.0

See NS Package Number Z03A

TO-46

Metal Can Package

DS005716-5

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

June 1999

LM136-5.0/LM236-5.0/LM336-5.0

5.0V

Reference

Diode

DS005716

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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 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

=25°C, I

=1 mA

LM136-5.0/LM236-5.0/LM336-5.0

4.9

5.00

5.1

4.8

5.00

5.2

LM136A-5.0/LM236A-5.0, LM336B-5.0

4.95

5.00

5.05

4.90

5.00

5.1

Reverse Breakdown Change

=25°C,

With Current

600 µA

10 mA

Reverse Dynamic Impedance

=25°C, I

=1 mA, f = 100 Hz

0.6

1.2

0.6

Temperature Stability

Adjusted 5.00V

(Note 4)

=1 mA, (Figure 2)

0°C

70°C (LM336-5.0)

-25°C

+85°C (LM236-5.0)

-55°C

+125°C (LM136-5.0)

Reverse Breakdown Change

600 µA

10 mA

With Current

Adjustment Range

Circuit of

Figure 1

Reverse Dynamic Impedance

= 1 mA

0.8

1.6

0.8

2.5

Long Term Stability

=25°C

0.1°C, I

=1 mA, t = 1000 hrs

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, T

max is:

LM136

150°C

LM236

125°C

LM336

100°C

Thermal Resistance

TO-92

TO-46

SO-8

(Junction to Ambient)

180°C/W (0.4" Leads)

440°C/W

165°C/W

170°C/W (0.125"
Leads)

(Junction to Case)

N/A

80°C/W

N/A

Note 3: Unless otherwise specified, the LM136-5.0 is specified from -55°C

+125°C, the LM236-5.0 from -25°C

+85°C and the LM336-5.0 from

0°C

+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
V

REF

from 25°C to T

(min) or T

(max).

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Typical Performance Characteristics

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.

Reverse Voltage Change

DS005716-17

Zener Noise Voltage

DS005716-18

Dynamic Impedance

DS005716-19

Response Time

DS005716-20

Reverse Characteristics

DS005716-21

Temperature Drift

DS005716-22

Forward Characteristics

DS005716-23

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Physical Dimensions

inches (millimeters) unless otherwise noted (Continued)

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Plastic Package (Z)

Order Number LM236AZ-5.0, LM336Z-5.0 or LM336BZ-5.0

NS Package Number Z03A

LM136-5.0/LM236-5.0/LM336-5.0

5.0V

Reference

Diode

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.

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