L6759D datasheet(12/51 Pages) STMICROELECTRONICS

12 / 51 page

Pin description and connection diagrams

L6759D

12/51

Doc ID 023240 Rev 1

VTT level sensitive enable pin (3.3 V compatible).

Pull low to disable the device, pull up above the turn-on threshold to

enable the controller.

SVCLK

Serial clock.

ALERT#

Alert.

SVDATA

Serial data.

VCC5

Main IC power supply.

Operative voltage is 5 V ±5%. Filter with 1

µF MLCC to GND (typ.).

GDC

Gate drive control pin.

Used for efficiency optimization, see Section 9 for details. If not used, it

can be left floating. Always filter with 1

µF MLCC to GND.

VDRV

Driving voltage for external drivers.

Connect to the selected voltage rail to drive the external MOSFET when

in maximum power conditions. IC switches GDC voltage between VDRV

and VCC5 to implement efficiency optimization according to selected

strategies.

COMP /

ADDR

Error amplifier output.

Connect with an (RF - CF)// CP to FB. The device cannot be disabled by

pulling low this pin.

Connect RCOMP to GND to extend PMBus addressing range (see

Table 6).

Error amplifier inverting input.

Connect with a resistor RFB // (RI - CI) to VSEN and with an (RF - CF)//

CP to COMP.

VSEN

Output voltage monitor, manages OV and UV protection.

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

FBR

Remote buffer positive sense.

Connect to the positive side of the multi-phase load to perform remote

sense.

LTB

Load transient boost technology® input pin. See Section 11.2 for details.

RGND

Remote ground sense.

Connect to the negative side of the multi-phase load to perform remote

sense.

REF

The reference used for the multi-phase section regulation is available on

this pin with -125 mV offset. Connect through an RREF-CREF to GND to

optimize DVID transitions. Connect through ROS resistor to FB pin to

implement small positive offset to the regulation.

IMON

Current monitor output.

A current proportional to the multi-phase load current is sourced from

this pin. Connect through a resistor RMON to GND. The information

available on this pin is used for the current reporting and DPM. The pin

can be filtered through CIMON to GND.

Table 2.

Pin description (continued)

Pin#

Name

Function

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