©2001 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.0
Features
• Low tempera ture coefficient
• Guaranteed temperatu re stab ility 4mV typical
•0.2Ω dynamic impedance
• ±1.0% initial tolerance available
• Easily trimmed for minimum temperature drift
Description
The KA336-2.5/KA336B-2.5 integrated Circuits are
precision 2.5V shunt regulators. The monolithic IC voltage
reference operates as a low temperature coeffcient 2.5V
zener with 0.2W dynamic impedance. A third terminal on
the KA336-2.5/KA336B-2.5 allow the reference voltage and
temperature coefficent to be trimmed easily. KA336-2.5/
KA336B-2.5 are useful as a precision 2.5V low voltage
reference fo r digital voltmeters, power supplies or op am p
circuitry. The 2.5V makes it convenient to obtain a stable
reference from low voltage supplies. Further, since the
KA336-2.5/KA336B-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
KA336-2.5/KA336B-2.5
Programmable Shunt Regulator
KA336-2.5/KA336B-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 KA336-2.5/KA336B-2.5 TOPR 0 ~ + 70 °C
Storage Temperature Range TSTG - 60 ~ + 150 °C
Parameter Symbol Conditions KA336-2.5 KA336B-2.5
Min. Typ. Max. Min. Typ. Max. Unit
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 -2.66 -2.610 mV
Reverse Dynamic
Impedance ZDTA = +25°C
IR = 1mA - 0.2 0.6 - 0.2 1 Ω
Temperature Stability STTIR = 1mA - 1.8 6 - 1.8 6 mV
Reverse Breakdown
Change with Current ∆VR/∆IR400uA ≤ IR ≤ 10mA - 3 10 - 3 12 mV
Reverse Dynamic
Impedance ZDIR = 1mA - 0.4 1 - 0.4 1.4 Ω
Long Term Stability
In reference voltage ST IR = 1mA - 20 - - 20 - ppm/Khr
KA336-2.5/KA336B-2.5
3
Typical Perfomance Characteristics
Figure 1. Reverse Voltag e Cha nge
Figu re 3. Tempera ture Drift
Figure 2. Reverse Characteristics
Figure 4. Forward Characteristics
KA336-2.5/KA336B-2.5
4
Mechanical Dimensions
Package
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
KA336-2.5/KA336B-2.5
5
Ordering Information
Product Number Package Operating Temperature
KA336Z25 TO-92 0°C to + 70°C
KA336BZ25
KA336-2.5/KA336B-2.5
6/1/01 0.0m 001
Stock#DSxxxxxxxx
2001 Fairchild Semicond uctor Corporation
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CORPORA TION. As used he rein :
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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PRO DUCTS HEREIN TO IMPROVE RELIABILITY, FUN C TION OR DESIGN . FAIRCHILD DO ES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
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