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LTC3527/LTC3527-1

35271f

Table 1. Recommended Inductors

VENDOR

PART/STYLE

L(µH)

MAXIMUM

CURRENT

(mA)

DCR

(Ω)

DIMENSIONS

L × W × H

(mm)

Coilcraft

www.coilcraft.com

MSS5131

MSS4020

ME3220

2.2-10

3.3-10

1-10

1900-870

1100-540

3000-780

0.023-0.083

0.085-0.210

0.05-0.90

5.1 × 5.1 × 1

4 × 4 × 2

3.2 × 2.5 × 2

Coiltronics

www.cooperet.com

SD10

SD12

1-10

1.2-10

1930-760

2450-818

0.045-0.289

0.037-0.284

5.2 × 5.2 × 1

5.2 × 5.2 × 1.2

FDK

www.fdk.com

MIP3226D

MIPF2520D

1.5-6.8

1.5-4.7

1400-1000

1500-1000

0.07-0.12

0.07-0.11

3.2 × 2.6 × 1

2.5 × 2 × 1

Murata

www.murata.com

LQH43C

LQH32C

1-10

1-4.7

1080-650

800-650

0.08-0.24

0.09-0.15

4.5 × 3.2 × 2.6

3.2 × 2.5 × 2

Sumida

www.sumida.com

CDRH3D16

CDRH2D14

4.7-15

4.7-12

900-450

680-420

0.11-0.29

0.12-0.32

3.8 × 3.8 × 1.8

3.2 × 3.2 × 1.5

TDK

www.global.tdk.co.jp

VLF3010A

VLF5012A

1.5-10

2.2-10

1200-490

1500-800

0.068-0.58

0.090-0.30

2.6 × 2.8 × 1

4.5 × 4.7 × 1.2

Taiyo Yuden

www.t-yuden.com

NR3010

NR3015

4.7-15

750-400

1000-560

0.19-0.74

0.12-0.36

3 × 3 × 1

3 × 3 × 1.5

Table 2. Capacitor Vendor Information

SUPPLIER

PHONE

WEBSITE

AVX

(803) 448-9411

www.avxcorp.com

Murata

(714) 852-2001

www.murata.com

Taiyo-Yuden

(408) 573-4150

www.t-yuden.com

TDK

(847) 803-6100

www.component.tdk.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 VOUT1 (VOUT2) to FB1 (FB2)]. A typical value of 22pF

will generally sufﬁce.

Low ESR input capacitors reduce input switching noise and

reduce the peak current drawn from the battery. It follows

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 sufﬁcient 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.

APPLICATIONS INFORMATION

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