L6718 datasheet(14/71 Pages) STMICROELECTRONICS

14 / 71 page

Pin description and connection diagrams

L6718

14/71

DocID023399 Rev 3

SRGND

Single-phase rail remote ground sense.

Connect to the negative side of the single-phase rail load to perform

remote sense.

See Section 14 for proper layout of this connection.

SVSEN

Single-rail output voltage monitor.

Manages OVP/UVP protection and feedback disconnection. Connect to

the positive side of the load to perform remote sense. It is also the sense

for the single-phase rail LTB.

Connect to the positive side of the single-phase rail load to perform

remote sense.

See Section 14 for proper layout of this connection.

SFB

Error amplifier inverting input.

Connect with a resistor RSFB to SVSEN and with (RSF - CSF)// CSP to

SCOMP. A current proportional to the load current is supplied from this pin

in order to implement the droop effect. See Section 8.4 for details.

SCOMP

Error amplifier output.

Connect with an (RSF - CSF)// CSP to SFB. The device cannot be disabled

by pulling this pin low.

SIMON

Current monitor output.

A current proportional to the output current is sourced from this pin.

Connect through a resistor RSIMON to local GND. Based on pin voltage,

overcurrent protection can be triggered. Filtering through CSIMON to GND

allows control of the delay for OC intervention. See Section 9.2 for RSIMON

definition.

SREF/JEN

The reference used for the regulation of the single-rail section is available

on this pin with -100 mV + offset. Connect through an RSREF-CSREF to

SRGND to optimize DVID transitions. See Section 8.6 for details.

If Jmode is selected by Config1 pinstrapping, this pin is used as a logic

input for the single-phase rail enable. Pulling this pin up above 0.8 V, the

single-phase rail turns on.

ENABLE

Enable pin.

External pull-up is needed on this pin.

Forced low to disable the device with all MOSFETs OFF: all protection is

disabled except for preliminary overvoltage.

Over 0.65 V the device turns up.

Cycle this pin to recover latch from protection, filter with 1 nF (typ.) to

GND.

STCOMP/

DDR

Thermal monitor sensor gain and DDR selected.

Connect proper resistor divider between VCC5 and GND to define the

gain to apply to the signal sensed by ST to implement thermal

compensation for the single-phase rail. See Section 10 for details. Short to

GND to disable thermal compensation and set the device to DDR mode.

Table 2. Pin description (continued)

Pin#

Name

Function

L6718 Datasheet(PDF) 14 Page - STMicroelectronics

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