LT1610 데이터 시트보기 (PDF) - Linear Technology
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LT1610 Datasheet PDF : 16 Pages
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LT1610
APPLICATIONS INFORMATION
A SEPIC (Single-Ended Primary Inductance Converter)
schematic is shown in Figure 4. This converter topology
produces a regulated output over an input voltage range
that spans (i.e., can be higher or lower than) the output.
Recommended component placement for a SEPIC is
shown in Figure 5.
INPUT
Li-ION
3V to 4.2V
+ C1
22µF
6.3V
C3
L1
22µH •
1µF
CERAMIC
D1
6
5
VIN
SW
1
VC
2
FB
LT1610
8
COMP
3
SHDN
GND
PGND
7
4
1M •
L2
22µH
604k
+
VOUT
3.3V
120mA
C2
22µF
6.3V
C1, C2: AVX TAJA226M006
C3: AVX 1206YC105 (X7R)
D1: MOTOROLA MBR0520
SHUTDOWN
L1, L2: MURATA LQH3C220 (UNCOUPLED)
OR SUMIDA CLS62-220 (COUPLED)
1610 F04
Figure 4. Li-Ion to 3.3V SEPIC DC/DC Converter
GROUND PLANE
VIN
R1
R2
1
8
C1
+
2 LT1610
7
SHUTDOWN
3
6
L1
L2
4
5
MULTIPLE
VIAs
C2
+
C3
GND
D1
VOUT
1610 F05
Figure 5. Recommended Component Placement for SEPIC
7
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