L6718TR datasheet(18/71 Pages) STMICROELECTRONICS

18 / 71 page

Pin description and connection diagrams

L6718

18/71

DocID023399 Rev 3

VREADY

Multi-phase rail VREADY

Open drain output set free after SS has finished and pulled low when

triggering any protection on multi-phase rail. Pull up to a voltage lower

than 3.3 V (typ.), if not used it can be left floating

CS4N

Channel 4 current sense negative input.

Connect through an RG resistor to the output-side of channel 4 inductor.

Filter the output-side of RG with 100 nF (typ.) to GND.

Connect to VOUT through an RG resistor when not using channel 4.

See Section 14 for proper layout of this connection.

CS4P

Channel 4 current sense positive input.

Connect through an R-C filter to the phase-side of channel 3 inductor.

Short to VOUT when not using channel 4.

See Section 14 for proper layout of this connection.

CS2P

Channel 2 current sense positive input.

Connect through an R-C filter to the phase-side of channel 2 inductor.

See Section 14 for proper layout of this connection.

CS2N

Channel 2 current sense negative input.

Connect through an RG resistor to the output-side of channel 2 inductor.

Filter the output-side of RG with 100 nF (typ.) to GND.

See Section 14 for proper layout of this connection.

PAD

GND

GND connection.

Exposed pad connects also the silicon substrate. It makes a good thermal

contact with the PCB to dissipate the internal power. All internal

references and logic are referenced to this pin.

Connect to power GND plane using 5.3 x 5.3 mm square area on the PCB

and with 9 vias (uniformly distributed) to improve electrical and thermal

conductivity.

Table 2. Pin description (continued)

Pin#

Name

Function

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