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PDF CAT431LEUR-TE7 Data sheet ( Hoja de datos )
| Número de pieza | CAT431LEUR-TE7 | |
| Descripción | Low-Voltage Adjustable Precision Voltage Reference | |
| Fabricantes | Catalyst Semiconductor | |
| Logotipo |  |
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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
1 page  
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
5 Page 
REVISION HISTORY
Date
12/15/03
Rev.
J
Reason
Updated typical performance characteristics
legend for Delta Reference voltage
CAT431L
Copyrights, Trademarks and Patents
Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:
DPP ™ AE2 ™
Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products. For a complete list of patents
issued to Catalyst Semiconductor contact the Company’s corporate office at 408.542.1000.
CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS
PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE
RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING
OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or
other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a
situation where personal injury or death may occur.
Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets
labeled "Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale.
Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate
typical semiconductor applications and may not be complete.
Catalyst Semiconductor, Inc.
Corporate Headquarters
1250 Borregas Avenue
Sunnyvale, CA 94089
Phone: 408.542.1000
Fax: 408.542.1200
www.catalyst-semiconductor.com
11
Publication #:
Revison:
Issue date:
Type:
4006
J
12/15/03
Final
Doc. No. 4006, Rev. J
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet CAT431LEUR-TE7.PDF ] | |
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