LTC3527 Linear Technology Corporation, LTC3527 Datasheet - Page 14

• Manufacturer Part Number: LTC3527
• Description: 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters
• Manufacturer: Linear Technology Corporation

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LTC3527/LTC3527-1
APPLICATIONS INFORMATION
Table 1. Recommended Inductors
VENDOR
Coilcraft
www.coilcraft.com
Coiltronics
www.cooperet.com
FDK
www.fdk.com
Murata
www.murata.com
Sumida
www.sumida.com
TDK
www.global.tdk.co.jp
Taiyo Yuden
www.t-yuden.com
The internal loop compensation of the LTC3527/
LTC3527-1 is designed to be stable with output capacitor
values of 4.7µF or greater. Although ceramic capacitors
are recommended, low ESR tantalum capacitors may be
used as well.
A small ceramic capacitor in parallel with a larger tantalum
capacitor may be used in demanding applications which
have large load transients. Another method of improving
the transient response is to add a small feed-forward
capacitor across the top resistor of the feedback divider
[from V
will generally suffi ce.
Low ESR input capacitors reduce input switching noise and
reduce the peak current drawn from the battery. It follows
14
OUT1
(V
OUT2
) to FB1 (FB2)]. A typical value of 22pF
PART/STYLE
MIPF2520D
CDRH3D16
CDRH2D14
MIP3226D
VLF3010A
VLF5012A
MSS5131
MSS4020
ME3220
LQH43C
LQH32C
NR3010
NR3015
SD10
SD12
1.5-4.7
2.2-10
3.3-10
1.2-10
1.5-6.8
4.7-15
4.7-12
2.2-10
4.7-15
4.7-15
L(µH)
1.5-10
1-4.7
1-10
1-10
1-10
that ceramic capacitors are also a good choice for input
decoupling and should be located as close as possible to
the device. A 2.2µF input capacitor is suffi cient for most
applications, although larger values may be used without
limitations. Table 2 shows a list of several ceramic capaci-
tor manufacturers. Consult the manufacturers directly for
detailed information on their selection of ceramic parts.
Table 2. Capacitor Vendor Information
SUPPLIER
AVX
Murata
Taiyo-Yuden
TDK
MAXIMUM
1500-1000
CURRENT
1400-1000
1900-870
1100-540
3000-780
2450-818
1500-800
1000-560
1930-760
1080-650
1200-490
800-650
900-450
680-420
750-400
(mA)
[phone]
[phone]
[phone]
[phone]
PHONE
0.023-0.083
0.085-0.210
0.037-0.284
0.045-0.289
0.090-0.30
0.068-0.58
0.05-0.90
0.07-0.11
0.09-0.15
0.11-0.29
0.12-0.32
0.19-0.74
0.12-0.36
0.07-0.12
0.08-0.24
DCR
(Ω)
www.component.tdk.com
www.avxcorp.com
www.t-yuden.com
www.murata.com
WEBSITE
5.2 × 5.2 × 1.2
4.5 × 3.2 × 2.6
3.8 × 3.8 × 1.8
3.2 × 3.2 × 1.5
4.5 × 4.7 × 1.2
DIMENSIONS
5.1 × 5.1 × 1
3.2 × 2.5 × 2
5.2 × 5.2 × 1
3.2 × 2.6 × 1
3.2 × 2.5 × 2
2.6 × 2.8 × 1
2.5 × 2 × 1
3 × 3 × 1.5
L × W × H
4 × 4 × 2
3 × 3 × 1
(mm)
35271f