參數(shù)資料
型號: CAT431LEZR-TEAP
英文描述: Low-Voltage Adjustable Precision Voltage Reference
中文描述: 低電壓可調(diào)節(jié)精密電壓基準
文件頁數(shù): 1/11頁
文件大?。?/td> 146K
代理商: CAT431LEZR-TEAP
1
FEATURES
I
Low startup overshoot
I
Wide current operation: 40
μ
A to 100mA
I
Low temperature coefficient reference: +12mV
max deviation over temperature
I
Accurate 1.24V reference voltage: +0.5%
(+6mV) at 25
°
C
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.
CAT431L
Low-Voltage Adjustable Precision Voltage Reference
- 0.5% Tolerance
- SOT23 and TO92 Packages
- Low Startup Overshoot
I
Low dynamic impedance: 0.3
at 1kHz
I
Compact 3-lead SOT23 package option
I
Industrial temperature range: -40
°
C to 85
°
C
I
Adjustable output voltage: V
REF
to 6V
2003 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc. No. 4006, Rev. J
APPLICATIONS
I
SMPS control loop
I
Shunt regulator
I
Low temperature coefficient voltage reference
I
Current limiting
I
Over/Under voltage monitor
I
3V Off-line switching regulators
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.
FUNCTIONAL DIAGRAM
+
VREF
REF
CATHODE
ANODE
1.24
REF
CATHODE
ANODE
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