LM336Z25 Programmable Shunt Regulator
April 1999
Revised August 2005
LM336Z25
Programmable Shunt Regulator
General Description
The LM336Z25 integrated circuits are precision 2.5V shunt reg-
ulators. The monolithic IC voltage reference operates as a low
temperature coefficient 2.5V zener with 0.2W dynamic imped-
ance. The monolithic IC voltage reference operates as a low
temperature coefficient 2.5V zener with 0.2W dynamic imped-
ance. A third terminal on the LM336Z25 allows the reference
voltage and temperature coefficient to be trimmed easily.
LM336Z25 are useful as a precision 2.5V low voltage reference
for digital voltmeters, power supplies or OP-AMP circuitry. The
2.5V makes it convenient to obtain a stable reference from low
voltage supplies. Further, since the LM336Z25 operate as shunt
regulators, they can be used as either a positive or negative
voltage reference.
Features
O
Low Temperature Coefficient
O
Guaranteed Temperature Stability 4mV Typical
O
0.2W Dynamic Impedance
O
1.0% Initial Tolerance Available
O
Easily Trimmed for Minimum Temperature Drift
Ordering Code:
Product Number
LM336Z25
LM336Z25X
LM336Z25XA
TO-92
Package
Packing
Bulk
Tape and Reel
Ammo
Operating Temperature
0
q
C to +70
q
C
© 2005 Fairchild Semiconductor Corporation
DS400009
www.fairchildsemi.com
LM336Z25
Absolute Maximum Ratings
(Note 1)
Parameter
Reverse Current
Forward Current
Operating Temperature Range LM336Z25
Storage Temperature Range
Symbol
IR
IF
TOPR
TSTG
Value
15
10
0
a
+70
60
a
+150
Unit
mA
mA
q
C
q
C
Note 1:
The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The
parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum rating.
Electrical Characteristics
(0
q
C < T
A
< +70
q
C, unless otherwise specified)
Parameter
Reverse Breakdown Voltage
Symbol
V
R
T
A
= +25
q
C,
I
R
= 1mA
Reverse Breakdown Change with Current
'
V
R
/
'
I
R
Conditions
Min
2.44
Typ
2.49
Max
2.54
Unit
V
T
A
= +25
q
C
400
P
A
d
I
R
d
10mA
-
2.6
10
mV
Reverse Dynamic Impedance
Z
D
T
A
= +25
q
C
I
R
= 1mA
-
0.2
1
:
Temperature Stability
Reverse Breakdown Change with Current
Reverse Dynamic Impedance
Long Term Stability In Reference Voltage
ST
T
'
V
R
/
'
I
R
I
R
= 1mA
400
P
A
d
I
R
d
10mA
I
R
= 1mA
I
R
= 1mA
-
-
-
-
1.8
3
0.4
20
6
12
1.4
-
mV
mV
:
ZD
ST
ppm/Khr
3
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LM336Z25
Typical Performance Characteristics
FIGURE 1. Reverse Voltage Change
FIGURE 2. Reverse Characteristics
FIGURE 3. Temperature (
q
C)
FIGURE 4. Forward Characteristics
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