Texas Instruments LM336LP-2-5, LM336D-2-5, LM236DR-2-5, LM236D-2-5, LM236LP-2-5 Datasheet

CHIP FORM

(Y)

D

Low Temperature Coefficient

D

Wide Operating Current . . . 400 µA
to 10 mA

D

0.27-Ω Dynamic Impedance

D

±1% Tolerance Available

D

Specified Temperature Stability

D

Easily Trimmed for Minimum Temperature
Drift

D

Fast Turnon

D

Three-Lead Transistor Package

description

The LM236-2.5 and LM336-2.5 integrated
circuits are precision 2.5-V shunt regulator
diodes. These monolithic references operate as
low-temperature-coefficient 2.5-V zeners with a

0.2-Ω dynamic impedance. A third terminal
provided on the circuit allows the reference
voltage and temperature coefficient to be easily
trimmed.

LM236-2.5, LM336-2.5

2.5-V INTEGRATED REFERENCE CIRCUITS

SLVS063B – NOVEMBER 1988 – REVISED JULY 1999

D PACKAGE

(TOP VIEW)

CATHODE

8

NC

7

NC

6

ADJ

5

ANODE
CATHODE

ADJ

CATHODEANODE

symbol

NC

1

NC

2

NC

3

ANODE

NC-No internal connection

4

LP PACKAGE

(TOP VIEW)

ADJ

The series is useful as precision 2.5-V low-voltage
references (V

) for digital voltmeters, power

Z

supplies, or operational-amplifier circuitry . The 2.5-V voltage reference makes it convenient to obtain a stable
reference from 5-V logic supplies. Devices in this series operate as shunt regulators, and can be used as either
positive or negative voltage references.

The LM236-2.5 is characterized for operation from –25°C to 85°C. The LM336-2.5 is characterized for operation
from 0°C to 70°C.

AVAILABLE OPTIONS
PACKAGED DEVICES

T

A

0°C to 70°C LM336D-2.5 LM336LP-2.5 LM336Y-2.5

–25°C to 85°C LM236D-2.5 LM236LP-2.5 —

The D package is available taped and reeled. Add the suffix R to the device type (i.e.,
LM336DR-2.5). Chip forms are tested at 25°C.

SMALL OUTLINE PLASTIC

(D) (LP)

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Copyright  1999, Texas Instruments Incorporated

1

LM236-2.5, LM336-2.5

Operating free-air temperature, T

°C

2.5-V INTEGRATED REFERENCE CIRCUITS

SLVS063B – NOVEMBER 1988 – REVISED JULY 1999

schematic diagram

CATHODE

Q8

20 pF

Q2

Q1

Q3

All component values are nominal

Q7

10 kΩ

30 pF

Q4

Q6

Q5

Q14

24
kΩ

720 Ω

Q9

Q12

24
kΩ

Q10

Q11

6.6 kΩ

500 Ω
30 kΩ

6.6 kΩ

Q13

ADJ

ANODE

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Reverse current, IR 20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Forward current, IF 10 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance, θ

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or LP package 260°C. . . . . . . . . . . . . . .

Storage temperature range, T

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. Maximum power dissipation is a function of TJ(max),

ambient temperature is PD = (TJ(max) – TA)/

2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.

(see Notes 1 and 2): D package 97°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . .

JA

LP package 156°C/W. . . . . . . . . . . . . . . . . . . . . . . . . .

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

stg

θ

, and TA. The maximum allowable power dissipation at any allowable

θ

JA

JA

. Operating at the absolute maximum TJ of 150°C can impact reliability.

†

recommended operating conditions

p

2

MIN MAX UNIT

p

A

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

LM236-2.5 –25 85
LM336-2.5 0 70

°

PARAMETER

TEST CONDITIONS

T

†

UNIT

VZReference voltage

I

mA

25°C

V

∆V

g

I

400 µA to 10 mA

mV

I

Ω

PARAMETER

TEST CONDITIONS

UNIT

LM236-2.5, LM336-2.5

2.5-V INTEGRATED REFERENCE CIRCUITS

SLVS063B – NOVEMBER 1988 – REVISED JULY 1999

electrical characteristics at specified free-air temperature (unless otherwise noted)

A

= 1

Z

Change in reference

∆V

∆V

z

z

†

Full range is –25°C to 85°C for the LM236-2.5 and 0°C to 70°C for the LM336-2.5.

voltage with

Z(∆T)

temperature
Change in reference

Z(∆I)

voltage with current
Long-term change

Z(∆t)

in reference voltage
Reference

impedance

VZ adjusted to 2.490 V ,
IZ = 1 mA

=

Z

IZ = 1 mA 25°C 20 20 ppm/khr

= 1 mA,f = 1 kHz

Z

LM236, LM336
LM236A, LM336B

°

Full range 3.5 9 1.8 6 mV

25°C 2.6 6 2.6 10

Full range 3 10 3 12

25°C 0.2 0.6 0.2 1

Full range

electrical characteristics, TA = 25°C

V

∆V

∆V

z

Z

z

Reference voltage IZ = 1 mA 2.39 2.49 2.59 V
Change in reference voltage with current IZ = 400 µA to 10 mA 2.6 10 mV

Z(∆I)

Long-term change in reference voltage IZ = 1 mA 20 ppm/khr

Z(∆t)

Reference impedance IZ = 1 mA, f = 1 kHz 0.2 1 Ω

LM236-2.5 LM336-2.5

MIN TYP MAX MIN TYP MAX

2.44 2.49 2.54 2.39 2.49 2.59

2.465 2.49 2.515 2.44 2.49 2.54

0.4 1 0.4 1.4

LM336Y-2.5

MIN TYP MAX

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3

LM236-2.5, LM336-2.5

2.5-V INTEGRATED REFERENCE CIRCUITS

SLVS063B – NOVEMBER 1988 – REVISED JULY 1999

TYPICAL CHARACTERISTICS

CHANGE IN REFERENCE VOLTAGE

REFERENCE CURRENT

2.5
TA = 25°C

2

1.5

1

0.5

Z

∆V – Change in Reference Voltage – mV

0

0246

IZ – Reference Current – mA

Figure 1

vs

100

IZ = 1 mA
TA = – 55°C to 125°C

250

Hz

200

nV/

150

– Noise Voltage –V

100

n

810

50

REFERENCE IMPEDANCE

vs

FREQUENCY

NOISE VOLTAGE

vs

FREQUENCY

IZ = 1 mA
TA = 25°C

10 100 1 k

f – Frequency – Hz

Figure 2

10 k 100 k

Ωz

10

1

– Reference Impedance –

z

0.1

0.01 0.1 1

10 100

f – Frequency – kHz

Figure 3

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

LM236-2.5, LM336-2.5

2.5-V INTEGRATED REFERENCE CIRCUITS

SLVS063B – NOVEMBER 1988 – REVISED JULY 1999

APPLICATION INFORMATION

5 V

2.49 kΩ

2.5 V

†

IN457

5 V

LM236-2.5

2.49 kΩ

2.5 V

10 kΩ

IN457

‡

†

LM236-2.5

NC

Figure 4. 2.5-V Reference

Figure 6. Wide-Input-Range Reference

VI = 3.5 – 40 V

LM334

LM336-2.5

V+

V–

†

Any silicon signal diode

‡

Adjust to 2.49 V

Figure 5. 2.5-V Reference With Minimum

Temperature Coefficient

R

68.1 Ω

VO = 2.5 V

NC

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

5

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Copyright  1999, Texas Instruments Incorporated