www.austriamicrosystems.com/AS3643

1.5-4

29 - 33

AS3643

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

The fast switching frequency (4MHz) of the AS3643 allows for the use of small SMDs for the external inductor. The

very low DC resistance (DCR) to reduce the I

PCB Layout Guideline

The high speed operation requires proper layout for optimum performance. Route the power traces first and try to min-

imize the area and wire length of the two high frequency/high current loops:

11.Can be adjusted in I

Table 24. Recommended Inductor

Part Number

L

DCR

Size

Manufacturer

C3-P1.5R

1.5µH

58m



2.4A@25ºC,

2.0A

1

3x3x1.5mm

(height is

max.)

Mitsumi

www.mitsumi.com

LQM32PN1R0MG0

1.0µH

>0.6µH @ 3.0A

60m



3.0A

3.2x2.5x0.9

mm

max 1.0mm

height

Murata

www.murata.com

LQM2HPN1R0MGC

1.0µH

>0.6µH @ 2.0A

100m



1.5A (2.0A)

2

2. Flash cycle limit: 150ms on, 500ms off; repeat maximum 50 times.(if used with default coil_peak=0b (2A))

2.5x2.0x0.9

mm

max 1.00mm

height

CIG32W1R0MNE

1.0µH

>0.7µH @ 2.7A

>0.6µH @ 3.0A

60m



+/-25%

3.0A

3.2x2.5mm

max 1.0mm

height

Samsung Electro-

Mechancs

www.sem.samsung.co.kr

NRH2412T1R0N

1.0µH

>0.6µH @ 2.5A

77m



2.5A

2.4x2.4x1.2

mm (height

is max.)

Taiyo Yuden

www.t-yuden.com

CKP3225N1R0M

1.0µH

>0.6µH @ 3.0A

<60m



3.0A

3.2x2.5x0.9

mm

max 1.0mm

height

MAMK2520T1R0M

1.0µH

>0.6µH @ 2.75A

45m



3.0A

2.5x2.0x1.2

mm

height is max

MDMK2020T1R0M

1.0µH

>0.6µH @ 2.75A

56m



2.55A

2.0x2.0x1.2

mm

height is max

MAKK2016T1R0M

1.0µH

>0.6µH @ 2.75A

65m



2.0A

3

3. Set current limit to 2A ()coil_peak=10b) - can limit maximum output current.

2.0x1.6x1.0

mm

height is max