Datasheet

LMR62421

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SNVS734B –OCTOBER 2011–REVISED APRIL 2013

PIN DESCRIPTIONS - 5-Pin SOT-23

Pin Name Function

1 SW Switch node. Connect to the inductor, output diode.

2 GND Signal and power ground pin. Place the bottom resistor of the feedback network as close as possible to this pin.

3 FB Feedback pin. Connect FB to external resistor divider to set output voltage.

4 EN Shutdown control input. Logic high enables operation. Do not allow this pin to float or be greater than VIN + 0.3V.

5 VIN Supply voltage for power stage, and input supply voltage.

PIN DESCRIPTIONS - 6-Pin WSON

Pin Name Function

1 PGND Power ground pin. Place PGND and output capacitor GND close together.

2 VIN Supply voltage for power stage, and input supply voltage.

3 EN Shutdown control input. Logic high enables operation. Do not allow this pin to float or be greater than VIN + 0.3V.

4 FB Feedback pin. Connect FB to external resistor divider to set output voltage.

5 AGND Signal ground pin. Place the bottom resistor of the feedback network as close as possible to this pin & pin 4.

6 SW Switch node. Connect to the inductor, output diode.

DAP GND Signal & Power ground. Connect to pin 1 & pin 5 on top layer. Place 4-6 vias from DAP to bottom layer GND plane.

Product Folder Links: LMR62421