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AMS431L Datasheet(PDF) 3 Page - Advanced Monolithic Systems

Part # AMS431L
Description  1.2V SHUNT REGULATOR
PDF  7 Pages
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Manufacturer  ADMOS [Advanced Monolithic Systems]
Direct Link  http://www.advanced-monolithic.com
Logo ADMOS - Advanced Monolithic Systems

AMS431L Datasheet(HTML) 3 Page - Advanced Monolithic Systems

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Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS431L
TEST CIRCUITS
V
IN
I
REF
I
Z
V
Z = VREF
V
REF
V
IN
V
Z
I
Z
V
REF
I
REF
R1
R2
V
IN
V
Z
I
Z OFF
Figure 1. Test Circuit for VZ=VREF
Figure 2. Test Circuit for VREF vs IZ.
Test circuit for IREF.
Figure 3. Test Circuit for Off-State Current
TYPICAL APPLICATIONS
1) Set the VOUT according to the following equation:
2) Choose the value of R as follows:
•
The maximum limit for R should be such that the cathode current, IZ is greater than the minimum operating current (80µA) at VIN(min).
•
The minimum limit for R should b such that IZ does not exceed 100mA under all load conditions, and the instantaneous turn-on value for IZ does not
exceed 150mA. Both of the following conditions must be met:
R2
R1
V
IN
GND
V
REF
V
OUT
R1
I
R2
R1
1
V
V
REF
REF
OUT
+
⎟
⎠
⎞
⎜
⎝
⎛
+
=
()
Z
IN(max)
min
I
on
-
turn
ous
instantane
limit
to
150mA
V
R
≥
()
conditions
operating
normal
under
I
limit
to
100mA
I
V
-
V
R
Z
OUT(min)
OUT
IN(max)
min
+
≥



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