L6714 datasheet(36/70 Pages) STMICROELECTRONICS

36 / 70 page

Voltage positioning

L6714

36/70

Voltage positioning

Output voltage positioning is performed by selecting the reference DAC and by

programming the Droop Function and Offset to the reference (See Figure 11). The currents

sourced from DROOP and FB pins cause the output voltage to vary according to the

external RFB resistor.

In addition, the embedded Remote Buffer allows to precisely programming the output

voltage offsets and variations by recovering the voltage drops across distribution lines.

The output voltage is then driven by the following relationship:

where

DROOP function can be disabled as well as the OFFSET: connecting DROOP pin and FB

pin together implements the load regulation dependence while, if this effect is not desired,

by shorting DROOP pin to SGND it is possible for the device to operate as a classic Voltage

Mode Buck converter. The DROOP pin can also be connected to SGND through a resistor

obtaining a voltage proportional to the delivered current usable for monitoring purposes.

OFFSET can be disabled by shorting the relative pin to SGND.

OUT

REF

DROOP

OFFSET

–

()

⋅

–

REF

VID

19mV

–

VR10 - VR11

VID

AMD 6BIT

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L6714 Datasheet(PDF) 36 Page - STMicroelectronics