LT1610 Linear Technology, LT1610 Datasheet - Page 7

• Manufacturer Part Number: LT1610
• Description: Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
• Manufacturer: Linear Technology

APPLICATIONS
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
U
GROUND PLANE
INFORMATION
SHUTDOWN
U
3V to 4.2V
MULTIPLE
R1
INPUT
Li-ION
VIAs
R2
GND
Figure 5. Recommended Component Placement for SEPIC
W
+
C1, C2: AVX TAJA226M006
C3: AVX 1206YC105 (X7R)
D1: MOTOROLA MBR0520
L1, L2: MURATA LQH3C220 (UNCOUPLED)
Figure 4. Li-Ion to 3.3V SEPIC DC/DC Converter
1
2
3
4
C1
22 F
6.3V
OR SUMIDA CLS62-220 (COUPLED)
LT1610
C2
+
1
8
U
COMP
V
C
V
GND
IN
7
6
8
7
6
5
LT1610
22 H
L1
V
C1
OUT
PGND
•
SW
SHDN
+
4
5
that spans (i.e., can be higher or lower than) the output.
Recommended component placement for a SEPIC is
shown in Figure 5.
FB
SHUTDOWN
C3
D1
CERAMIC
2
3
V
1 F
L1
IN
C3
1M
604k
L2
•
L2
22 H
D1
+
C2
22 F
6.3V
1610 F04
V
3.3V
120mA
OUT
1610 F05
LT1610
7