L6751C datasheet(16/57 Pages) STMICROELECTRONICS

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Electrical specifications

L6751C

16/57

DocID025037 Rev 1

Soft-start

SS time - Intel CPU mode

Vboot > 0, from pin-strapping; multi-

phase section

5mV/

s

Vboot > 0, from pin-strapping; single-

phase section

2.5

mV/

s

Vboot > 0, from pin-strapping; single-

phase section, JMode ON

2.5

mV/

s

SS time - Intel DDR mode

Vboot > 0, from pin-strapping; multi-

phase section

2.5

mV/

s

Vboot > 0, from pin-strapping; single-

phase section

1.25

mV/

s

SS time - AMD mode

Vboot > 0, from pin-strapping; both

sections

6.25

mV/

s

Turn-ON

VEN rising

0.6

Turn-OFF

VEN falling

0.4

Leakage current

A

SVI serial bus

SVCLCK,

SVDATA

Input high

0.65

Input low

0.45

SVDATA,

ALERT#

Voltage low (ACK)

ISINK = -5 mA

PMBus

SMDATA,

SMCLK

Input high

1.75

Input low

1.45

SMAL#

Voltage low

ISINK = -4 mA



Reference and DAC

kVID

VOUT accuracy (MPhase)

IOUT = 0 A; N = 6; RG = 540 ;

RFB = 1.108 kVID > 1.000 V

-0.5

0.5

kSVID

VOUT accuracy (SPhase)

IOUT = 0 A; RG = 1.3 k

VID > 1.000 V

-0.5

0.5

IOUT = 0 A; RG = 1.3 k

VID > 1.000 V; JMODE = ON

-5

kVID, kSVID

VOUT accuracy

VID = 0.8 V to 1 V

-5

VID < 0.8 V

-8

kVOUT

VOUT accuracy - AMD

mode

-20

DROOP

LL accuracy (MPhase) 0

to full load

IINFOx = 0; N = 6; RG = 540 ;

RFB = 1.108 k

-3

A

The same as above, IINFOx = 20 A-4.5

4.5

A

Table 5. Electrical characteristics (continued)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

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