LMZ21701 Datasheet, PDF (27/37 Pages) Texas Instruments – LMZ21701 1 A SIMPLE SWITCHER® Nano Module with 17 V Maximum Input Voltage

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Layout Example (continued)
PLACE THE INPUT CAPACITOR AS CLOSE
AS POSSIBLE TO THE MODULE VIN AND
GND PINS
GND VIAS TO MINIMIZE INDUCTANCE IN
THE di/dt LOOP
PLACE THE FEEDBACK DIVIDER AS CLOSE
AS POSSIBLE TO THE MODULE TO KEEP
THE FB NODE SMALL
LMZ21701
SNVS853D – AUGUST 2012 – REVISED NOVEMBER 2014
VIN EN VOS GND
GND
SS FB PG VOUT
VOUT
LAYER 1
UNBROKEN GND PLANE FOR THERMAL
PERFORMANCE AND SHIELDING
ENABLE CONNECTION
VOS CONNECTION J KEEP AWAY FROM
NOISE SOURCES
CONNECTION TO THE SOFTSTART
CAPACITOR
POWER GOOD FLAG CONNECTION
LAYER 2
LAYER 3
UNBROKEN GND PLANE FOR THERMAL
PERFORMANCE AND SHIELDING
LAYER 4
Figure 81. Layout example
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