CAT431L Datasheet PDF - Catalyst Semiconductor
| Part Number | CAT431L | |
| Description | Low-Voltage Adjustable Precision Voltage Reference | |
| Manufacturers | Catalyst Semiconductor | |
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There is a preview and CAT431L download ( pdf file ) link at the bottom of this page. Total 11 Pages | ||
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CAT431L
Low-Voltage Adjustable Precision Voltage Reference
- 0.5% Tolerance
- SOT23 and TO92 Packages
- Low Startup Overshoot
FEATURES
s Low startup overshoot
s Wide current operation: 40µA to 100mA
s Low temperature coefficient reference: +12mV
max deviation over temperature
s Accurate 1.24V reference voltage: +0.5%
(+6mV) at 25°C
s Low dynamic impedance: 0.3Ω at 1kHz
s Compact 3-lead SOT23 package option
s Industrial temperature range: -40°C to 85°C
s Adjustable output voltage: V to 6V
REF
APPLICATIONS
s SMPS control loop
s Shunt regulator
s Low temperature coefficient voltage reference
s Current limiting
s Over/Under voltage monitor
s 3V Off-line switching regulators
DESCRIPTION
The CAT431L is a low-voltage three-terminal
adjustable shunt voltage reference with guaranteed
thermal stability over the industrial temperature range.
The CAT431L has a lower 1.24V reference and wider
operating current range than the widely used TL431
and TL431A shunt-regulator references. Compared
to the TLV431/A, the CAT431L 1.24V reference is two
times more accurate.
FUNCTIONAL DIAGRAM
Minimal overshoot at startup and wide AC bandwidth
make the CAT431L easy to apply in a wide set of
applications. When used with an opto-coupler, the
CAT431L is an ideal voltage reference in isolated
feedback circuits for 3V to 3.3V switch-mode power
supplies.
CATHODE
REF
1.24 VREF
+
–
CATHODE
REF
ANODE
ANODE
© 2003 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 4006, Rev. J
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CAT431L
TYPICAL PERFORMANCE CHARACTERISTICS
Off-State Cathode Current
vs.
Junction Temperature
80
70
60
50
40
30
20
10
0
-50 -25 0 25 50 75 100 125 150
Junction Temperature (°C)
Delta Reference Voltage Per
Delta Cathode Voltage vs.
Junction Temperature
0
-0.02
-0.04
-0.06
-0.08
-0.10
-0.12
-0.14
-0.16
-0.18
-50 -25 0 25 50 75 100 125 150
Junction Temperature (°C)
Open Loop Voltage Gain
vs.
Frequency
100
80
60
40
20
0
-20
0.001
0.01 0.1 1 10
Frequency (kHz)
100 1000
Dynamic Impedance
vs.
Frequency
100
10
1
0.1
0.1
1 10 100 1000 10000
Frequency (kHz)
5 Doc. No. 4006, Rev. J
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for CAT431L electronic component. |
| Information | Total 11 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ CAT431L.PDF Datasheet ] | |
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