L6713ATR Просмотр технического описания (PDF) - STMicroelectronics

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L6713ATR

2/3 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6 bit CPUs

STMicroelectronics 

Pin settings

L6713A

Table 2. Pin description (continued)

N°

Pin

Function

Output enable pin. Internally pulled up by 12.5 µA(typ) to 5 V.

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

protections are disabled except for Preliminary over voltage.

17 OUTEN

Leave floating, the device starts-up implementing soft-start up to the selected

VID code.

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

Load transient boost pin.

Internally fixed at 1 V, connecting a RLTB - CLTB vs. VOUT allows to enable the

18

LTB

Load transient boost technology™: 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.

19

SGND

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

Ground.

It manages OVP and UVP protections and PGOOD (when applicable).

See “Output voltage monitor and protections” Section.

20

VSEN 100 µA constant current (IOFFSET, See Table 5) is sunk by VSEN pin in order to

generate a positive offset in according to the ROFFSET resistor between VSEN

pin and VOUT. See “Offset (Optional)” Section for details.

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

according to the current reading gain.

21 DROOP 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.

22

FB

Error amplifier inverting input. Connect with a resistor RFB vs. VSEN and with

an RF - CF vs. COMP.

23

COMP Error amplifier output. Connect with an RF - CF vs. FB.

The device cannot be disabled by pulling down this pin.

24

N.C. Not internally connected.

25

N.C. Not internally connected.

Channel 2 current sense positive input.

Connect through an R-C filter to the phase-side of the channel 2 inductor.

26

CS2+

Short to SGND or to VOUT when using 2 Phase operation.

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

Channel 2 current sense negative input.

Connect through a Rg resistor to the output-side of the channel 2 inductor.

27

CS2-

Leave floating when using 2 Phase operation.

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

Channel 3 current sense positive input.

28

CS3+ Connect through an R-C filter to the phase-side of the channel 3 inductor.

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

Channel 3 current sense negative input.

29

CS3- Connect through a Rg resistor to the output-side of the channel 3 inductor.

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

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