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CYT431A

型号：

CYT431A

描述：

- 12号的铝制车身绘（ RAL 7032 ）

品牌：

ETC[ ETC ]

页数：

8 页

PDF大小：

181 K

下载PDF手册
CYT 431A  
Adjustable Precision Shunt Regulator  
General Description  
Features  
The CYT431A is a programmable shunt  
voltage reference with guaranteed temperature  
stability over the entire temperature range of  
operation.  
■
■
■
■
■
■
Adjustable output voltage V0 =2.5V to 36V.  
Wide operating current range 120µA to 150mA.  
Low dynamic output impedance 0.2Ω (Typ.).  
Voltage Reference Tolerance: ±0.4%.  
ESD rating is 5.5KV(Per MIL-STD-883D).  
Available in Lead Free Packages.  
The output voltage may be set to any  
value between 2.5V and 36V 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  
Applications  
■
■
■
■
■
■
Adjustable Supplies  
Battery Operated Computers  
Computer Disk Drives  
Linear Regulators  
Zener diodes in many applications.  
The CYT431A is characterized for  
operation from 0°C to 105°C.  
Instrumentation  
Switching Power Supplies  
TO-92 Package  
SOT-23 Package  
SOP-8 Package SOT-89 Package  
ShenZhen CYT IC Design CO ,Ltd  
1
CYT 431A  
Pin Configuration  
1. Ref  
1. Cathode  
2. Anode  
3. Ref  
2. Cathode  
3. Anode  
SOT-23  
TO-92  
1. Cathode  
2. Anode  
3. Anode  
4. NC  
1.Ref  
2.Anode  
3.Cathode  
5. NC  
6. Anode  
7. Anode  
8. Ref  
SOT-89  
SOP-8  
Application Diagram  
ShenZhen CYT IC Design CO ,Ltd  
2
CYT 431A  
Marking Information  
Production Lead-Free  
Week Code Package  
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  
next character is marked on top for 2003, and  
underlined for 2004.The naming pattem continues  
with consecutive characters for later years.  
Lead-free package is  
indicated by a dot on  
top of the week  
code.  
SOT-23-3  
CYT431A  
SC59-3L  
A-Z:1-26  
a-z:27-52  
WW is the week  
of production.  
26 means the  
CYT431A  
SOP-8  
YYWW  
Lead-free package is  
indicated by LF after  
YYWW.  
CYT431A  
SOT-89  
YY is the year of production. 04 means the  
product is manufactured in year of 2004.  
product  
is  
YYWW  
manufactured  
CYT/TL431A  
TO-92  
in  
the  
26th  
YYWW  
week.  
Absolute Maximum Ratings  
Symbol  
VKA  
Parameter  
Value  
36  
Units  
V
Cathode to Anode Voltage  
Continuous Cathode Current  
Reference Current  
I KA  
150  
mA  
mA  
°C  
I REF  
10  
TJ  
Operating Junction Temperature Range  
Storage Temperature Range  
150  
TSTG  
-65 to 150  
220 (TO-92)  
°C  
θJA  
230 (SOT-23)  
150 (SOP-8)  
120 (SOT-89)  
260  
Thermal Resistance  
°C/W  
°C  
TLEAD  
Lead Temperature (Soldering) 10 seconds  
ShenZhen CYT IC Design CO ,Ltd  
3
CYT 431A  
Electrical Characteristics  
Test  
Circuit  
Parameter  
Symbol  
Test Conditions  
Min Typ Max Unit  
0.5%  
2483 2495 2507  
Reference  
Voltage  
VREF  
1
1
VKA=VREF,IKA=10mA  
mV  
mV  
1%  
2%  
2470 2495 2520  
2445 2495 2545  
Deviation of reference  
voltage over full  
VKA=VREF,IKA=10mA  
TA=0°C to 105°C  
VI(DEV)  
--  
4
25  
temperature range  
Ratio of change in  
reference voltage to the △VREF  
IKA=10mA,  
2
--  
-1.4  
-2.7 MV/V  
change in cathode  
volage  
△VKA  
△VKA=10V- VREF  
IKA=10mA,  
R1=10Kꢀ, R2=∞,  
IKA=10mA, R1=10Kꢀ,  
R2=∞, TA=0°C to  
105°C  
Reference current  
IREF  
2
2
--  
--  
2
4
uA  
uA  
Deviation of Reference  
current over full  
II(DEV)  
0.4  
1.2  
temperature range  
Minimum cathode  
current for regulation  
Off-state cathode  
current  
IMIN  
IOFF  
ZKA  
1
3
1
VKA=VREF  
--  
--  
--  
0.2  
0.1  
0.2  
1
1
mA  
uA  
ꢀ
VKA=18V, VREF=0  
IKA=1mA to 100mA,  
Dynamic impedance  
0.7  
VKA=VREF, f ≤ 1KHz  
ShenZhen CYT IC Design CO ,Ltd  
4
CYT 431A  
Typical Performance Characteristics  
ShenZhen CYT IC Design CO ,Ltd  
5
CYT 431A  
Thermal Consideration  
Package  
Power Rating  
Power Rating  
(TA=50°C)  
Power Rating  
(TA=70°C)  
(TA=25°C)  
SOT-23-3  
435mW  
326mW  
341mW  
239mW  
250mW  
(θJA=230°C/W)  
TO-92 (θJA=220°C/W)  
455mW  
1. Maximum junction temperature is 125°C  
2. θJA is measured with packages mounted onboard under still-air condition with 1W power applied.  
3. Power rating is calculated using PD = (TJ – TA) /θJA, where TJ denotes junction temperature and  
TA denotes ambient temperature.  
Test Circuits  
Block Diagram  
Symbol Diagram  
ShenZhen CYT IC Design CO ,Ltd  
6
CYT 431A  
OUTLINE DRAWING SC59-3L (SOT-23-3L)  
DIMENSIONS  
INCHES  
MM  
DIMN  
A
A1  
B
MIN  
MAX  
0.043  
0.005  
0.020  
0.008  
0.122  
0.122  
0.067  
MIN  
0.90  
0.01  
0.30  
0.09  
2.80  
2.50  
1.50  
MAX  
1.10  
0.13  
0.50  
0.20  
3.10  
3.10  
1.70  
0.035  
0.0004  
0.012  
0.004  
0.110  
0.098  
0.059  
C
D
H
E
0.037REF  
0.075REF  
0.95REF  
1.90REF  
e
e1  
L1  
L
0.008  
0.022  
0.031  
10°C  
0.20  
0.55  
0.80  
10°C  
0.014  
0°C  
0.35  
0°C  
Q
OUTLINE DRAWING TO-92  
DIMENSIONS  
INCHES  
MM  
DIMN  
MIN  
MAX  
0.205  
0.210  
0.610  
0.021  
0.055  
0.105  
0.105  
0.165  
MIN  
MAX  
5.207  
5.334  
15.50  
0.533  
1.397  
2.667  
2.667  
4.191  
0.175  
0.170  
0.500  
0.016  
0.045  
0.095  
0.080  
0.125  
4.445  
4.318  
12.70  
0.407  
1.143  
2.413  
2.032  
3.175  
A
B
E
F
G
H
J
K
ShenZhen CYT IC Design CO ,Ltd  
7
CYT 431A  
OUTLINE DRAWING SOP-8  
DIMENSIONS  
INCHES  
MIN MAX  
MM  
DIMN  
MIN  
0.35  
0.10  
0.33  
MAX  
1.75  
0.25  
0.51  
0.0532 0.0688  
0.0040 0.0098  
0.0130 0.0200  
0.050BSC  
A
A1  
B
B1  
C
D
H
E
1.27BSC  
0.0075 0.0098  
0.1890 0.1968  
0.2284 0.2440  
0.1497 0.1574  
0.19  
0.25  
5.00  
6.20  
4.00  
4.80  
5.80  
3.80  
OUTLINE DRAWING SOT-89  
DIMENSIONS  
INCHES  
MM  
DIMN  
MIN  
0.173  
0.159  
0.067  
0.051  
0.094  
0.035  
MAX  
0.181  
0.167  
0.075  
0.059  
0.102  
0.047  
MIN  
MAX  
4.600  
4.250  
1.900  
1.500  
2.600  
1.200  
4.400  
4.050  
1.700  
1.300  
2.400  
0.890  
A
B
C
D
E
F
G
H
I
0.118REF  
0.059REF  
3.00REF  
1.50REF  
0.016  
0.020  
0.063  
0.016  
0.400  
0.520  
1.600  
0.410  
0.055  
0.014  
1.400  
0.350  
J
K
L
M
10°TYP  
0.028REF  
10°TYP  
0.70REF  
ShenZhen CYT IC Design CO ,Ltd  
8
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