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LR8 Datasheet(PDF) 4 Page - Supertex, Inc

Part No. LR8
Description  High Input Voltage Adjustable 3-Terminal Linear Regulator
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Maker  SUTEX [Supertex, Inc]
Homepage  http://www.supertex.com
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 4 page
background image
4
LR8
Typical Application Circuits
LR8
VIN=15V to 450V
V
OUT
ADJ
V
IN
*
R1
6.04KΩ
±1%
R2
18.2KΩ
±1%
C2
1.0µF
C1
RLOAD ≤16.5KΩ
VOUT=5.0V
VOUT = 1.20V 1+
R2
R1
+ IADJR2
PWM IC
LR8
Vout1
Vout2
+
+
-
-
Vcc
VAuxiliary
VIN=15V to 450V
V
OUT
ADJ
V
IN
FB
LR8
VIN = 15V
to 450V
VOUT
ADJ
VIN
R
Load
IOUT =
1.20V
R
+
-
1µF
Figure 1: High Input Voltage, 5.0V Output Linear Regulator
* Required for conditions where VIN is less than VOUT.
Figure 2: SMPS Start-Up Circuit
Figure 3: High Voltage Adjustable Constant Current Source




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