SC2620 datasheet(22/26 Pages) SEMTECH

Part #	SC2620

Description	Dual 2A, 30V Step-down Regulator with Programmable Frequency up to 1.4MHz

PDF	26 Pages

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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22 / 26 page

 2006 Semtech Corp.

www.semtech.com

SC2620

POWER MANAGEMENT

Suggested PCB Layout for the SC2620.

Figure 15.

C15

C16

C10

R10

R20

GND

AGND

OUT2

OUT1

IN or OUT1

C15

C16

C10

R10

R20

GND

AGND

OUT2

OUT1

IN or OUT1

start capacitors and the VIN filtering capacitor C

16 are to

be tied to the analog ground. The frequency-setting resistor

9 is placed next to the ROSC pin and is also connected to

the analog ground. R

20 is a 0Ω resistor that connects the

analog ground to the power ground at a single point.

Applications Information

The exposed pad should be soldered to a large analog

ground plane as the analog ground copper acts as a heat

sink for the device. To ensure proper adhesion to the

ground plane, avoid using vias directly under the device.

In figure 15 two 12mil vias are placed at the edge of the

underside pad.

SC2620 Datasheet(PDF) 22 Page - Semtech Corporation