AS1170 datasheet(46/53 Pages) OSRAM

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AS1170

Application information

Datasheet

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Application information

10.1

External components

10.1.1

Input capacitor CVIN

Low ESR input capacitors reduce input switching noise and reduce the peak current drawn

from the battery. Ceramic capacitors are required for input decoupling and should be located

as close to the device as is practical.

Table 21: Recommended input capacitor

Part number

code

Rated

voltage

Size

Manufacturer

GRM188R60J106ME47

10 µF >3 µF @ 4.5 V > 2 µF @ 5.25 V

X5R

6.3 V

0603

Murata

LMK107BBJ106MA

10 µF > 3 µF @ 4.5 V

X5R

6.3 V

0603

Taiyo Yuden

If a different input capacitor is chosen, ensure similar ESR value and at least 3 µF capacitance

at the maximum input supply voltage. Larger capacitor values (C) may be used without

limitations.

Add a smaller capacitor in parallel to the input pin VIN (e.g. Murata GRM155R61C104, >50 nF

@ 3 V, 0402 size).

10.1.2

Output capacitor CVOUT

Low ESR capacitors should be used to minimize VOUT ripple. Multi-layer ceramic capacitors

are recommended since they have extremely low ESR and are available in small footprints.

The capacitor should be located as close to the device as is practical.

X5R dielectric material is recommended due to their ability to maintain capacitance over wide

voltage and temperature range.

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