LT7184S datasheet(40/52 Pages) AD

40 / 52 page

Data Sheet

LT7184S

analog.com

Rev. 0

40 of 52

Figure 41. LTPowerPlay GUI

Board Layout Considerations

Note that large, switched currents flow between the LT7184S PVIN and PGND pins and the input capacitors. The

loops formed by the input capacitors should be made as small as possible by placing them adjacent to the PVIN and

PGND (or SGND) pins.

The input capacitors, inductors, and output capacitors should be placed on the same side of the circuit board. And

their connections should be made on the same layer. Place a local, unbroken ground plane under the application

circuit on the next layer closest to the surface layer that contains the LT7184S and the PVIN capacitors, the inductor,

and the output and boost caps. SGND should be connected to PCB ground at exactly one point adjacent to the

SGND pin; SGND and PGND are connected within the LT7184S package.

The SW and BOOST nodes should be made as small as possible, while SW metal should be designed to support the

full load current. Add extra spacing from adjacent GND or other signal nodes to SW and BOOST to reduce

capacitance.

For more details and PCB design files, refer to the LT7184S PMBus/I2C Reference Manual.

LT7184S Datasheet(PDF) 40 Page - Analog Devices