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ML4890 데이터 시트보기 (PDF) - Micro Linear Corporation
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ML4890
High Efficiency, Low Ripple Boost Regulator
Micro Linear Corporation
ML4890 Datasheet PDF : 12 Pages
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ML4890
V
IN
100
µ
F
1
µ
F
33
µ
H
(Sumida CD54)
ML4890
V
IN
PWR GND
V
REF
SHDN
GND
V
L
V
OUT
V
BOOST
33
µ
F
100
µ
F
I
OUT
V
OUT
Figure 1. Application Test Circuit
L1
6
5
Q2
+
A2
–
C2
I
LOAD
R1
Q3
+
A3
–
V
REF
R2
4
C1
R
5
µ
s
S
ONE SHOT
Q1
–
A1
+
+–
V
OS
= f (I
LOAD
)
Figure 2. PFM Regulator and LDO Block Diagram
4
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