L6718 datasheet(13/71 Pages) STMICROELECTRONICS

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L6718

Pin description and connection diagrams

RGND

Remote ground sense pin.

Connect to the negative side of the load to perform remote sense.

See Section 14 for proper layout of this connection.

VSEN

Output voltage monitor pin.

Manages OVP/UVP protection and feedback disconnection. Connect to

the positive side of the load to perform remote sense. A fixed 50 uA

current is sourced from this pin.

See Section 14 for proper layout of this connection.

LTB

Load transient boost technology input pin.

Internally fixed at 1.67 V, connecting RLTB - CLTB vs. VOUT allows the load

transient boost technology to be enabled, as soon as the device detects a

transient load it turns on all the phases at the same time. Short to SGND

to disable the function.

See Section 12.2 for details.

Error amplifier inverting input.

Connect with an RFB to VSEN and (RF - CF)// CP to COMP.

A current proportional to the load current is sourced from this pin in order

to implement the droop effect. See Section 8.2 for details.

COMP

Error amplifier output.

Connect with (RF - CF)// CP to FB.

The device cannot be disabled by pulling down this pin.

IMON

Current monitor output.

A current proportional to the multi-phase rail output current is sourced

from this pin. Connect through a resistor RIMON to GND to show a voltage

proportional to the current load. Based on pin voltage level, DPM and

overcurrent protection can be triggered. Filtering through CIMON to GND

allows control of the delay. See Section 9.2 for RIMON definition.

REF

The reference used for the regulation of the multi-phase rail section is

available on this pin with -100 mV + offset. Connect through an RREF-

CREF to RGND to optimize DVID transitions. See Section 8.6 for details.

Table 2. Pin description (continued)

Pin#

Name

Function

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