LR8K4 データシートの表示（PDF） - Supertex Inc
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LR8K4 Datasheet PDF : 11 Pages
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LR8
Typical Application Circuits
*
VIN=15V to 450V
C1
V
V
IN
OUT
ADJ
LR8
R2
18.2KΩ
±1%
VOUT=5.0V
R1
6.04KΩ
±1%
C2
1.0µF
RLOAD ≤16.5KΩ
VOUT = 1.20V
1+
R2
R1
+ IADJ R2
Figure 1: High Input Voltage, 5.0V Output Linear Regulator
* Required for conditions where VIN is less than VOUT.
VIN=15V to 450V
LR8
V
V
IN
OUT
ADJ
VAuxiliary
Vcc
FB PWM IC
+
Vout1
-
+
Vout2
-
Figure 2: SMPS Start-Up Circuit
+
VIN = 15V
to 450V
LR8
VIN
VOUT
ADJ
1µF
IOUT
=
1.20V
R
R
Load
-
Figure 3: High Voltage Adjustable Constant Current Source
4
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