zht431 Zetex Semiconductors plc., zht431 Datasheet - Page 7

• Manufacturer Part Number: zht431
• Description: Zht431 - Adjustable Precision Zener Shunt Regulator
• Manufacturer: Zetex Semiconductors plc.

Application circuits
Issue 6 - July 2007
© Zetex Semiconductors plc 2007
three terminal fixed regulator
Single supply comparator
V+Vout
Input
compensated threshold
+
V
Vref
Vout
TH
Output control of a
Vout=
with temperature
= 2.5V
In
MIN
Vout=
Shunt regulator
ZSR***
R1
R2
= Vref + Vreg
1 +
Common
1 +
V+
R1
R2
R1
R2
Out
Vref
V
V
Vref
on
off
= V+
Output
Vref
R1
R2
Vout
2V
V+
Vref
R1A
R2A
Over voltage / under voltage
V+
7
Higher current shunt regulator
V+Vout
Low limit =
High limit = 1 +
Vref
protection circuit
Vref
Series regulator
Vout=
R1B
R2B
0.01µF
1 +
Vout=
30
R1
R2
R1B
R2B
R1A
R2A
R2
1 +
R1
1 +
R1
R2
Vref
Vref
R1
R2
Vref
Vref
Vref
Vout
Output
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ZHT431