Diodes ZR431 - Manual (Page 6)

ZR431
ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
ZR431
Document number: DS33255 Rev. 6 - 2
6 of 9
www.diodes.com
October 2011
© Diodes Incorporated
ADVAN
CE I
N
F
O
RM
ATI
O
N
Application Characteristics
VREF
2 R
1 R
1 VOUT
⎟
⎠
⎞
⎜
⎝
⎛ +
=
SHUNT REGULATOR
VREF
2 R
1 R
1 VOUT
⎟
⎠
⎞
⎜
⎝
⎛ +
=
HIGHER CURRENT SHUNT REGULATOR
V
OUT(MIN)
= V
REF
+ V
REG
VREF
2 R
1 R
1 VOUT
⎟
⎠
⎞
⎜
⎝
⎛ +
=
OUTPUT CONTROL OF A THREE TERMINAL
FIXED REGULATOR
VREF
2 R
1 R
1 VOUT
⎟
⎠
⎞
⎜
⎝
⎛ +
=
SERIES REGULATOR
SINGLE SUPPLY COMPARATOR WITH
TEMPERATURE COMPENSATED THRESHOLD
VREF
B 2 R
B 1 R
1 it lim Low ⎟
⎠
⎞
⎜
⎝
⎛ +
+
VREF
A 2 R
A 1 R
1 it lim High ⎟
⎠
⎞
⎜
⎝
⎛ +
+
OVER VOLTAGE/UNDER VOLTAGE
PROTECTION CIRCUIT
V+ V
OUT
V
REF
R1
R2
ZSR***
Common
IN OUT
V+
V
REF
V
OUT
R2
R1
30 Ω
0.01µF
V+ V
OUT
V
REF
R1
R2
V+ V
OUT
R1
R2
V
REF
V+
INPUT
V = 2.5V
TH
OUTPUT
V = V+
OFF
V 2V
ON
≈
V+
V
REF
OUTPUT V
REF
R1A R1B
R2A R2B