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LM336-2.5/LM336B-2.5
Programmable Shunt Regulator
Features
•
•
•
•
•
Low Temperature Coefficient
Guaranteed Temperature Stability 4mV Typical
0.2Ω
D
ynamic Impedance
±1.0% Initial Tolerance Available
Easily Trimmed for Minimum Temperature Drift
Description
The LM336-2.5/LM336B-2.5 integrated circuits are
precision 2.5V shunt regulators. The monolithic IC voltage
reference operates as a low temperature coefficient 2.5V
zener with 0.2W dynamic impedance. A third terminal on
the LM336-2.5/LM336B-2.5 allows the reference voltage
and temperature coefficient to be trimmed easily. LM336-
2.5/LM336B-2.5 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
LM336-2.5/LM336B-2.5 operate as shunt regulators, they
can be used as either a positive or negative voltage reference.
TO-92
1
1. Adj 2. + 3. -
Internal Block Diagram
2
+
R1
Q9
R5
Q8
C2 R4
Q7
C1
Q16
R8
Q2
Q10
Q11
Q15
R9
Q4
Q1
Q3
Q5
Q6
Q12
Q14
Q18
R10
R6
R7
Q17
1
ADJUST
Q13
R2
R3
3
_
Rev. 1.0.1
©2002 Fairchild Semiconductor Corporation
LM336-2.5/LM336B-2.5
Absolute Maximum Ratings
Parameter
Reverse Current
Forward Current
Operating Temperature Range LM336-2.5/LM336B-2.5
Storage Temperature Range
Symbol
I
R
I
F
T
OPR
T
STG
Value
15
10
0 ~ +70
- 60 ~ +150
Unit
mA
mA
°C
°C
Electrical Characteristics
(0°C < T
A
< +70°C, unless otherwise specified)
Parameter
Reverse Breakdown
Voltage
Reverse Breakdown
Change with Current
Reverse Dynamic
Impedance
Temperature Stability
Reverse Breakdown
Change with Current
Reverse Dynamic
Impedance
Long Term Stability
In Reference Voltage
Symbol
V
R
∆V
R
/∆I
R
Z
D
ST
T
∆V
R
/∆I
R
Z
D
ST
Conditions
T
A
= +25°C
I
R
= 1mA
T
A
= +25°C
400uA
≤
I
R
≤
10mA
T
A
= +25°C
I
R
= 1mA
I
R
= 1mA
400uA
≤
I
R
≤
10mA
I
R
= 1mA
I
R
= 1mA
LM336-2.5
Min.
2.44
-
-
-
-
-
-
Typ.
2.49
2.6
0.2
1.8
3
0.4
20
Max.
2.54
10
1
6
12
1.4
-
LM336B-2.5
Min.
2.465
-
-
-
-
-
-
Typ.
2.49
2.6
0.2
1.8
3
0.4
20
Max.
2.515
6
0.6
6
10
1.0
-
Unit
V
mV
Ω
mV
mV
Ω
ppm/Khr
2
LM336-2.5/LM336B-2.5
Typical Performance Characteristics
Figure 1. Reverse Voltage Change
Figure 2. Reverse Characteristics
Figure 3. Temperature Drift
Figure 4. Forward Characteristics
3