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AS3490

Datasheet - A p p l i c a t i o n I n f o r m a t i o n

9 Application Information

External Components

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.

If a different input capacitor is chosen, ensure similar ESR value and at least 0.6µF capacitance at the maximum input

supply voltage. Larger capacitor values (C) may be used without limitations.

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

they have 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.

If a different output capacitor is chosen, ensure similar ESR values and at least 4.2µF @ 5.6V and maximum 20µF

capacitance.

Table 4. Recommended Input Capacitor

Part Number

C

TC Code

ESR

Rated

Voltage

Size

Manufacturer

GRM155R60J225ME15

2.2µF +/-20%

X5R

6V3

0402

(1.0x0.5x

0.5mm)

Murata

www.murata.com

GRM155R60J155M---D

1.5µF

X5R

6V3

ECJ0MBFJ185V

X5R

0402

(1.0x0.5x

0.5mm)

Panasonic Matsushita

www.panasonic.com

JDK105BJ155MVNF

X5R

0402

(1.0x0.5x

0.5mm)

Taiyo Yuden

www.taiyo-yuden.com

Part Number

C

TC Code

ESR

Rated

Voltage

Size

Manufacturer

GRM219R61A116UE82L

10µF

X5R

120m



10V

0805

(2x1.25x

0.85mm)

Murata

www.murata.com

LDK212BJ106MDNT

10µF

X5R

10V

0805

(2x1.25x

0.85mm)

Taiyo Yuden

www.taiyo-yuden.com