SC431 Semtech Corporation, SC431 Datasheet - Page 5

• Manufacturer Part Number: SC431
• Description: ADJUSTABLE SHUNT REGULATOR
• Manufacturer: Semtech Corporation

April 13, 1998
TYPICAL CHARACTERISTICS (Cont.)
APPLICATION CIRCUIT
© 1998 SEMTECH CORP.
-10
-20
0.01
80
70
60
50
40
30
20
10
1.0E+02
100
0.1
0
10
1.0E+03
1
I
T
Z
A
= 10mA
Small-Signal Gain and Phase Shift
= 25°C
1.0E+03
1.0E+04
Reference Impedance
vs. Frequency
vs. Frequency
1.0E+04
f (Hz)
1.0E+05
f (Hz)
1.0E+05
1.0E+06
I
T
Z
A
= 10mA
= 25°C
ADJUSTABLE SHUNT REGULATOR
1.0E+06
-180
-225
-270
-315
-360
-405
-450
-495
-540
-585
-630
1.0E+07
Notes for Application Circuit:
1) Set V
2) Choose the value for R as follows:
652 MITCHELL ROAD NEWBURY PARK CA 91320
V
The maximum limit for R should be such that the
cathode current, I
operating current (100µA) at V
The minimum limit for R should be such that I
does not exceed 150mA under all load conditions,
and the instantaneous turn-on value for I
exceed 200mA. Both of the following conditions
must be met:
R
R
OUT
min
min
OUT
V
200
I
V
REF
according to the following equation:
OUT
Test Circuit For Small-Signal
V
IN
(max)
IN
mA
(min)
(max)
1
Gain and Phase Shift
R
R
(to limit instantaneous turn-on I
150
2
1
V
Z
, is greater than the minimum
OUT
mA
I
REF
R
(to limit I
operating conditions)
1
IN(min)
Z
.
under normal
Z
SC431
does not
Z
Z
)
5