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CYT431

型号：

CYT431

描述：

- 12号的铝制车身绘（ RAL 7032 ）

品牌：

ETC[ ETC ]

页数：

7 页

PDF大小：

236 K

下载PDF手册
Adjustable Precision  
Shunt Regulator  
CYT431  
Description  
Features  
The CYT431 is  
a low voltage three terminal  
¾
¾
¾
¾
¾
¾
¾
Low voltage operation (2.5V)  
adjustable shunt regulator with a guaranteed thermal  
stability over applicable temperature ranges. The output  
voltage can be set to any value between VREF  
(approximately 2.5 V) to 18V 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.  
Adjustable output voltage V0 = VREF to 18V  
Wide operating current range 120µA to 100mA  
Low dynamic output impedance 0.2Ω (Typ.).  
Trimmed bandgap design up to + 0.5%.  
ESD rating is 5.5KV(Per MIL-STD-883D).  
Available in Lead Free Packages.  
Application  
¾
¾
¾
¾
¾
¾
Linear Regulators  
The CYT431 is characterized for operation from 0oC  
to 105oC, and five package options (SOT-23-3, SOT-23-5,  
SOP-8, TO-92 and SOT-89) allow the designer the  
opportunity to select the proper package for their  
applications.  
Adjustable Supplies  
Switching Power Supplies  
Battery Operated Computers  
Instrumentation  
Computer Disk Drives  
Block Diagram  
Symbol Diagram  
Cathode  
Cathode  
Ref  
+
-
Ref  
Vref  
Anode  
Anode  
All contents are subject to change without prior notice.  
1
Adjustable Precision  
Shunt Regulator  
CYT431  
Marking Information  
Package  
Marking  
Production Year Code  
Production Week Code  
Lead-Free Package  
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 pattern continues  
with consecutive characters for later years.  
SOT-23-3  
SC59-3L  
431  
Lead-free package is  
indicated by a dot on  
top of the week code.  
A-Z: 1-26  
a-z: 27-52  
431  
SOT-23-3  
SOT-23-5L  
SOP-8  
(431S)  
431W  
CYT431  
YYWW  
CYT431  
YYWW  
CYT431  
YYWW  
WW is the week of  
Lead-free package is  
indicated by LF after  
YYWW.  
YY is the year of production. 04 means the production. 26 means the  
SOT-89  
TO-92  
product is manufactured in year of 2004.  
product is manufactured in  
the 26th week.  
Pin Configuration  
SOT-23-3  
SOT-23-3  
SOT-23-5L  
SOT-23-3L (SC59-3L)  
(Order as CYT431S)  
TO-92  
SOP-8  
SOT-89  
(Top View)  
All contents are subject to change without prior notice.  
2
Adjustable Precision  
Shunt Regulator  
CYT431  
Absolute Maximum Ratings  
Parameter  
Symbol  
Maximum  
Units  
Cathode Voltage  
VKA  
I KA  
18  
150  
V
Continuous Cathode Current  
Reference Current  
mA  
mA  
°C  
I REF  
TJ  
10  
Operating Junction Temperature Range  
Storage Temperature Range  
150  
TSTG  
-65 to 150  
120 (SOT-89)  
230 (SOT-23-3)  
230 (SOT-23-5L)  
150 (SOP-8)  
220 (TO-92)  
260  
°C  
Thermal Resistance  
°C/W  
°C  
θ JA  
Lead Temperature (Soldering) 10 seconds  
TLEAD  
Electrical Characteristics  
TEST  
PARAMETER  
SYMBOL  
TEST CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
CIRCUIT  
0.5%  
1%  
2483  
2470  
2445  
2495  
2495  
2495  
2507  
2520  
2545  
Reference Voltage  
VREF  
1
VKA = VREF, IKA = 10mA  
mV  
2%  
Deviation of reference voltage over  
full temperature range  
VKA = VREF, IKA = 10mA  
TA = 0°C to 105°C  
VI(dev)  
1
2
--  
--  
4
25  
mV  
Ratio of change in reference  
voltage to the change in cathode  
voltage  
∆ VREF  
________  
∆ VKA  
IKA = 10mA,  
-1.4  
-2.7  
mV/V  
∆VKA = 10 V - VREF  
IKA = 10mA,  
Reference current  
IREF  
2
2
--  
--  
2
4
µA  
µA  
R1=10kΩ, R2 = ∞  
Deviation of Reference current  
over full temperature range  
Minimum cathode current for  
regulation  
IKA = 10mA, R1=10kΩ,  
R2 = ∞, TA = 0°C to 105°C  
II(dev)  
0.4  
1.2  
IMIN  
IOFF  
ZKA  
1
3
1
VKA = VREF  
--  
--  
--  
0.2  
0.1  
0.2  
1
1
mA  
µA  
Ω
Off-state cathode current  
VKA = 18V, VREF = 0  
IKA = 1mA to 100mA, VKA  
REF, f ≤ 1kHZ  
=
Dynamic impedance  
0.7  
V
All contents are subject to change without prior notice.  
3
Adjustable Precision  
Shunt Regulator  
CYT431  
Typical Performance Characteristics  
CATHODE CURRENT  
Vs.  
CATHODE CURRENT  
Vs.  
CATHODE VOLTAGE  
CATHODE VOLTAGE  
800  
600  
400  
200  
0
150  
125  
100  
75  
VKA = Vref  
TA = 25oC  
VKA = Vref  
TA = 25oC  
50  
25  
0
-25  
-50  
-75  
-100  
- 200  
-2  
-1  
0
1
2
3
- 1  
0
1
2
3
Cathode Voltage (V)  
Cathode Voltage (V)  
REFERENCE VOLTAGE  
Vs.  
REFERENCE INPUT CURRENT  
Vs.  
JUNCTION TEMPERATURE  
JUNCTION TEMPERATURE  
2520  
2515  
2510  
2505  
2500  
2495  
2490  
2485  
2480  
3
2. 5  
2
R1 = 10k  
Ω
VKA =Vref  
R2 =  
∞
IKA =10mA  
I
KA =10mA  
1. 5  
1
0. 5  
0
- 60 - 40 - 20  
0
20 40 60 80 100 120  
- 20  
0
20  
40  
60  
80  
100  
120  
Junction Temperature ( oC)  
Junction Temperature ( oC)  
All contents are subject to change without prior notice.  
4
Adjustable Precision  
Shunt Regulator  
CYT431  
Test Circuits  
V KA  
Input  
V
KA  
Input  
V
KA  
Input  
I off  
IKA  
I KA  
R1  
R2  
Iref  
Vref  
Vref  
R1  
R2  
) + Iref x R1  
V
KA = Vref (1+  
Test Circuit 1:  
KA = VREF  
Test Circuit 2:  
VKA > VREF  
Test Circuit 3:  
V
Off State Current  
Application Diagram  
R
V
OUT  
VIN  
R1  
R1  
R2  
CYT431  
Vref  
)
= Vref (1+  
V
OUT  
R2  
GND  
Thermal Consideration  
Package  
Power Rating  
(TA=25°C)  
435mW  
Power Rating  
(TA=50°C)  
326mW  
Power Rating  
(TA=70°C)  
239mW  
SOT-23-3 (θJA=230°C/W)  
SOT-23-5L (θJA=230°C/W)  
TO-92 (θJA=220°C/W)  
435mW  
326mW  
239mW  
455mW  
341mW  
250mW  
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.  
All contents are subject to change without prior notice.  
5
Adjustable Precision  
Shunt Regulator  
CYT431  
OUTLINE DRAWING SOT-23-3  
C
DIMENSIONS  
INCHES  
MIN MAX  
0.110 0.120  
0.047 0.055  
0.083 0.104  
0.035 0.040  
0.070 0.080  
0.018 0.024  
0.015 0.020  
J
H
B
MM  
DIMN  
MIN  
2.80  
1.20  
2.10  
0.89  
1.78  
0.45  
0.37  
MAX  
3.04  
1.40  
2.64  
1.03  
2.05  
0.60  
0.51  
0.10  
1.02  
0.18  
0.69  
A
B
C
D
E
F
G
H
J
D
A
E
G
F
0.0005 0.004 0.013  
0.034 0.040 0.887  
0.003 0.007 0.085  
K
K
L
L
-
0.027  
-
OUTLINE DRAWING SC59-3L (SOT-23-3L)  
DIMENSIONS  
INCHE  
MM  
MIN MAX  
DIMN  
H
MIN  
0.035 0.043 0.90  
0.0004  
MAX  
A
E
A
A1  
B
C
D
1.10  
0.13  
0.50  
0.20  
3.10  
3.10  
1.70  
A1  
0.005 0.01  
0.012 0.020 0.30  
0.004 0.008 0.09  
0.110 0.122 2.80  
0.098 0.122 2.50  
0.059 0.067 1.50  
B
e1  
D
H
E
0.037REF  
0.95REF  
e
0.075REF  
1.90REF  
e1  
L1  
L
L
0.008 0.022  
0.014 0.031  
0.20  
0.35  
0.55  
0.80  
Q
SC 59-3L  
Q
0
10  
0
10  
℃
℃
℃
℃
L1  
C
OUTLINE DRAWING SOT-23-5L  
K
B
DIMENSIONS  
INCHES  
MIN MAX MIN MAX  
MM  
DIMN  
H
D
0.110 0.120  
2.80  
1.50  
0.90  
0.35  
-
3.05  
1.75  
1.30  
0.50  
0.95  
1.90  
0.15  
0.20  
3.00  
A
B
C
D
E
F
H
J
F
A
0.059 0.070  
0.036 0.051  
0.014 0.020  
E
-
-
-
0.037  
0.075  
0.006  
-
-
C
J
0.0035 0.008 0.090  
0.102 0.118 2.60  
K
All contents are subject to change without prior notice.  
6
Adjustable Precision  
Shunt Regulator  
CYT431  
OUTLINE DRAWING TO-92  
DIMENSIONS  
INCHES  
A
MM  
DIMN  
B
D
MIN MAX MIN MAX  
0.175 0.205 4.445 5.207  
0.170 0.210 4.318 5.334  
0.500 0.610 12.70 15.50  
0.016 0.021 0.407 0.533  
0.045 0.055 1.143 1.397  
0.095 0.105 2.413 2.667  
0.080 0.105 2.032 2.667  
0.125 0.165 3.175 4.191  
A
B
E
F
G
H
J
E
G
F
H
K
K
J
OUTLINE DRAWING SOP-8  
DIMENSIONS  
INCHES  
MIN MAX MIN MAX  
0.0532 0.0688 1.35  
0.0040 0.0098 0.10  
0.0130 0.0200 0.33  
1
2
3
4
8
7
6
5
B
MM  
DIMN  
D
1.75  
0.25  
0.51  
A
A1  
B
B1  
C
D
H
E
B1  
A1  
A
E
H
0.050 BSC  
1.27 BSC  
0.0075 0.0098 0.19  
0.1890 0.1968 4.80  
0.2284 0.2440 5.80  
0.1497 0.1574 3.80  
0.25  
5.00  
6.20  
4.00  
C
OUTLINE DRAWING SOT-89  
DIMENSIONS  
INCHES  
MIN MAX  
MM  
MAX  
DIMN  
SOT-89  
MIN  
A
C
D
0.173 0.181 4.400 4.600  
0.159 0.167 4.050 4.250  
0.067 0.075 1.700 1.900  
0.051 0.059 1.300 1.500  
0.094 0.102 2.400 2.600  
0.035 0.047 0.890 1.200  
A
B
C
D
E
F
G
H
I
J
K
L
0.118REF  
0.059REF  
3.00REF  
1.50REF  
0.016 0.020 0.400 0.520  
0.055 0.063 1.400 1.600  
0.014 0.016 0.350 0.410  
J
K
L
G
H
I
10°TYP  
10°TYP  
0.028REF  
0.70REF  
M
All contents are subject to change without prior notice.  
7
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