LM21215MHX datasheet(25/33 Pages) TI1

Part #	LM21215MHX

Description	15A High Efficiency Point of Load Synchronous Buck Regulator

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Manufacturer	TI1 [Texas Instruments]

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PVIN

SW

PGND

L

VOUT

LM21215

CIN

COUT

LOOP1

LOOP2

VIN

LM21215

www.ti.com

SNVS625E – FEBRUARY 2011 – REVISED MARCH 2013

6. Provide adequate device heatsinking. For most 15A designs a four layer board is recommended. Use as many

vias as is possible to connect the EP to the power plane heatsink. The vias located undernieth the EP will wick

solder into them if they are not filled. Complete solder coverage of the EP to the board is required to achieve the

θJA values described in the previous section. Either an adequate amount of solder must be applied to the EP pad

to fill the vias, or the vias must be filled during manufacturing. See the THERMAL CONSIDERATIONS section to

ensure enough copper heatsinking area is used to keep the junction temperature below 125°C.

Figure 38. Schematic of LM21215 Highlighting Layout Sensitive Nodes

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