©2002 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
Features
• Low Temperature Co efficient
• Guaranteed Temperatu re Stability 4mV Typical
•0.2Ω Dynamic Im pe da n c e
• ±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 fo r digital voltmeters, po wer 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. Adj 2. + 3. -
1
Internal Block Diagram
2
1
3
+
_
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10 Q11
Q12 Q13 Q14
Q15
Q16
Q17
Q18
R1
R2 R3
R4
R5 R6 R7
R9
R8
R10
C1
C2
ADJUST
LM336-2.5/LM336B-2.5
Programmable Shunt Regulator
LM336-2.5/LM336B-2.5
2
Absolute Maximum Ratings
Electrical Characteristics
(0°C < TA < +70°C, unless otherwise specified)
Parameter Symbol Value Unit
Reverse Current IR15 mA
Forward Current IF10 mA
Operating Temperature Range LM336-2.5/LM336B-2.5 TOPR 0 ~ +70 °C
Storage Temperature Range TSTG - 60 ~ +150 °C
Parameter Symbol Conditions LM336-2.5 LM336B-2.5 Unit
Min. Typ. Max. Min. Typ. Max.
Reverse Breakdown
Voltage VRTA = +25°C
IR = 1mA 2.44 2.49 2.54 2.465 2.49 2.515 V
Reverse Breakdown
Change with Current ∆VR/∆IRTA = +25°C
400uA ≤ IR ≤ 10mA - 2.6 10 - 2.6 6 mV
Reverse Dynamic
Impedance ZDTA = +25°C
IR = 1mA - 0.2 1 - 0.2 0.6 Ω
Temperature Stability STTIR = 1mA - 1.8 6 - 1.8 6 mV
Reverse Breakdown
Change with Current ∆VR/∆IR400uA ≤ IR ≤ 10mA-312- 310 mV
Reverse Dynamic
Impedance ZDIR = 1mA - 0.4 1.4 - 0.4 1.0 Ω
Long Term Stability
In Reference Voltage ST IR = 1mA - 20 - - 20 - ppm/Khr
LM336-2.5/LM336B-2.5
3
Typical Performance Chara cte ristic s
Figure 1. Reverse Voltag e Cha nge
Figu re 3. Tempera ture Drift
Figure 2. Reverse Characteristics
Figure 4. Forward Characteristics
LM336-2.5/LM336B-2.5
4
Mechanical Dimensions
Package Dimensions in millimeters
0.46
±0.10
1.27TYP
(R2.29)
3.86MAX
[1.27
±0.20
]1.27TYP
[1.27
±0.20
]
3.60
±0.20
14.47
±0.40
1.02
±0.10
(0.25) 4.58
±0.20
4.58
+0.25
–0.15
0.38
+0.10
–0.05
0.38
+0.10
–0.05
TO-92
Reverse Current (mA)
LM336-2.5/LM336B-2.5
5
Ordering Information
Product Number Package Operating Temperature
LM336Z2.5 TO-92 0°C to +70°C
LM336BZ25
LM336-2.5/LM336B-2.5
11/12/02 0.0m 001
Stock#DSxxxxxxxx
2002 Fairchild Semicond uctor Corporation
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1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or syst em who se failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effec tiv ene ss.
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