NR121E Datasheet, PDF (9/12 Pages) Sanken electric – Buck Regulator

3A, 18V, Buck Regulator
NR120E series
May/16/2012
PCB Layout & Recommended Land Pattern
(1)Each ground of all components is connected as close as possible to the Pin No.4 at one point.
(2) To help heat dissipation, connect a large copper plane to exposed pad on the back side of the package.
The copper plane is required for GND
Front Side: Component Side (double sided board)
NOTES:
Real size of the PCB is 60mm×60mm
Back Side: GND Side (double sided board)
0.61 (0.024)
1.60 (0.063)
1.27 (0.050)
2.35 (0.092) 5.40 (0.213)
3.24 (0.127)
NOTES:
1) Dimension is in millimeters, dimension in bracket is in inches.
2) Drawing is not to scale.
Recommended land pattern
Rev.0.3
SANKEN ELECTRIC CO., LTD.
9
http://www.sanken-ele.co.jp