CYT 432
Adjustable Precision Shunt Regulator
General Description
The CYT432 is a programmable shunt voltage
reference with guaranteed temperature stability
over the entire temperature range of operation.
The output voltage may be set to any
value between 1.24V and 12V with two external
resistors. This device has a typical output
impedance of 0.2Ω. Active output circuitry
provides a very sharp turn on characteristic,
making this device excellent replacement for
Zener diodes in many applications.
The CYT432 is characterized for operation
from 0°C to 105°C.
Features
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Adjustable output voltage V
0
=1.24V to 12V.
Wide operating current range 0.06 to 100mA.
Low dynamic output impedance 0.25Ω(Typ.)
Voltage Reference Tolerance: ±0.5%.
ESD rating is 4KV(Per MIL-STD-883D).
Available in Lead Free Packages.
Applications
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Adjustable Supplies
Battery Operated Computers
Computer Disk Drives
Linear Regulators
Instrumentation
Switching Power Supplies
TO-92 Package
SOT-23 Package
SOP-8 Package
SOT-89 Package
ShenZhen CYT IC Design CO ,Ltd
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CYT 432
Pin Configuration
1.
Cathode
2.
Anode
3.
Ref
1.
Cathode
2.
Ref
3.
Anode
TO-92
1. Cathode
2. Anode
3. Anode
4. NC
5. NC
6. Anode
7. Anode
8. Re
f
SOT-23
1.Re
f
2.Anode
3.Cathode
SOP8
SOT-89
Application Diagram
ShenZhen CYT IC Design CO ,Ltd
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CYT 432
Marking Information
Package
Marking Production Year Code
Starting with S,a bar on top of S is for production
year 2001,and underlined S is for year 2002.The
Production
Week Code
A-Z:1-26
a-z:27-52
Lead-Free
Package
Lead-free package is
indicated by a dot on
top of the week code.
SOT-23-3
SC59-3L
CYT432
next character is marked on top for 2003, and
underlined for 2004.The naming pattem continues
with consecutive characters for later years.
SOP-8
SOT-89
TO-92
CYT432
YYWW
CYT432
YYWW
CYT432
YYWW
YY is the year of production. 04 means the
product is manufactured in year of 2004.
WW is the week of
production.
26
Lead-free package is
indicated by LF after
YYWW.
means the product
is manufactured in
the 26
th
week.
Absolute Maximum Ratings
Symbol
V
KA
I
KA
I
REF
T
J
T
STG
θ
JA
Thermal Resistance
Parameter
Cathode to Anode Voltage
Continuous Cathode Current
Reference Current
Operating Junction Temperature Range
Storage Temperature Range
Value
12
150
10
150
-45 to 150
220 (TO-92)
230 (SOT-23)
150 (SOP-8)
120 (SOT-89)
Units
V
mA
mA
°C
°C
°C/W
T
LEAD
Lead Temperature (Soldering) 10 seconds
260
°C
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CYT 432
Electrical Characteristics
Parameter
1.250V±0.5%
Reference
Voltage
1.240V±0.5%
1.240V±1.0%
1.240V±1.5%
1.240V±2.0%
Deviation of reference voltage over
full temperature range
Ratio of change in reference
voltage to the change in cathode
volage
Reference current
VI(DEV)
Test circuit #1
VKA=VREF,IKA=10mA
TA=0°C to 105°C
Test circuit #2
IKA=10mA,
△VKA=12V
to VREF
Test circuit #2
IKA=10mA,
R1=10KΩ, R2=∞,
Test circuit #2
IKA=10mA, R1=10KΩ,
R2=∞, TA=0°C to
105°C
Test circuit #1
VKA=VREF
VKA=12V, VREF=0
Test circuit #1
IKA=100uA to 80mA,
VKA=VREF, f
≤
1KHz
VREF
Test circuit #1
VKA=VREF,IKA=10mA
Symbol
Test Conditions
Min
1246
1234
1228
1221
1215
--
Typ
1250
1240
1240
1240
1240
10
Max
1256
1246
1252
1259
1265
25
Unit
mV
mV
△VREF
△VKA
--
-1.0
-2.7
MV/V
IREF
--
0.15
2
uA
Deviation of Reference current over
full temperature range
Minimum cathode current for
regulation
Off-state cathode current
Dynamic impedance
II(DEV)
--
0.10
0.50
uA
IMIN
IOFF
ZKA
--
--
--
60
0.04
0.25
100
0.8
1
uA
uA
Ω
ShenZhen CYT IC Design CO ,Ltd
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CYT 432
Typical Performance Characteristics
ShenZhen CYT IC Design CO ,Ltd
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