L6714D datasheet(8/70 Pages) STMICROELECTRONICS

8 / 70 page

Pin settings

L6714

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VCC

Device supply voltage. The operative voltage is 12V ±15%. Filter with 1µF (typ)

MLCC vs. SGND.

DAC/

CS_SEL

DAC and Current Sense SELection Pin.

This pin sources a constant 12.5µA current. By connecting a resistor vs. SGND

it is possible to select between Intel and AMD integrated DACs and Current

Sense methods.

Filter with 100pF(max) vs. SGND.

DACs and Current Sense methods cannot be changed dynamically.

See “DAC selection” Section and See Table 10 for details.

OUTEN

OUTput ENable Pin.

Forced low, the device stops operations with all MOSFET OFF: all the

protections are disabled except for Section 16.2: Preliminary over voltage on

page 47.

Set free, the device starts-up implementing soft-start up to the selected VID

code.

Cycle this pin to recover latch from protections; filter with 1nF (typ) vs. SGND.

SSOSC/

REF

Intel Mode. Soft Start OSCillator Pin.

By connecting a resistor RSSOSC vs. SGND, it allows programming the frequency

FSS of an internal additional oscillator that drives the reference during Soft-Start.

Setting this frequency allows programming the Soft-Start time TSS proportionally

to the RSSOSC connected with a gain of 20.1612 [µs / kΩ]. The same slope

implemented to reach VBOOT has to be considered also when the reference

moves from VBOOT to the programmed VID code. See “Soft start” Section for

details.

AMD Mode. REFerence Output. Filter with 47

Ω - 4.7nF vs. SGND.

SGND

All the internal references are referred to this pin. Connect to the PCB Signal

Ground.

VSEN

Remote Buffer Output, it manages OVP and UVP protections and PGOOD

(when applicable). See “Output voltage monitor and protections” Section and

See Table 10 for details.

DROOP

A current proportional to the total current read is sourced from this pin according

to the Current Reading Gain.

Short to FB to implement Droop Function or Short to SGND to disable the

function.Connecting to SGND through a resistor and filtering with a capacitor,

the current info can be used for other purposes.

See “Droop function (Optional)” Section

Error Amplifier Inverting Input. Connect with a resistor RFB vs. VSEN and with an

RF - CF vs. COMP.

COMP

Error Amplifier Output. Connect with an RF - CF vs. FB.

The device cannot be disabled by pulling down this pin.

CS4+

Channel 4 Current Sense Positive Input.

LS Mosfet Sense: connect through a resistor Rg to the LS mosfet Source.

Inductor DCR Sense: connect through an R-C filter to the phase-side of the

channel 4 inductor.

See “Layout guidelines” Section for proper layout of this connection.

Table 1.

Pin functions

N°

Function

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