L6713ATR datasheet(43/64 Pages) STMICROELECTRONICS

43 / 64 page

L6713A

Soft-start

43/64

Protections are active during soft-start, UVP is enabled after the reference reaches 0.6V

while OVP is always active with a fixed 1.24V threshold before VBOOT and with the threshold

coming from the VID (or the programmed VOVP) after VBOOT (See red-dashed line in

Figure 15).

Note:

If during T3 the programmed VID selects an output voltage lower than VBOOT, the output

voltage will ramp to the programmed voltage starting from VBOOT.

16.1.1

SS/LTB/AMD connections when using LTB™ gain = 2

SS/LTB/AMD pin sets then the output voltage dV/dt during soft-start according to the

resistor RSSOSC connected vs. SSEND/PGOOD pin through a signal diode(See Figure 16).

Figure 16.

SS/LTBG/AMD connections for INTEL mode, when using LTB™ gain = 2

where TSS is the time spent to reach the programmed voltage VSS and RSSOSC the resistor

connected between SS/LTBG/AMD and SSEND (through a signal diode) in k

Ω.

SSEND/PGOOD

RSSOSC

SS/LTBG/AMD

RPull-Up

VPull-Up

to SSEND Logic

SSOSC kΩ

[]

2 μs

[] 4.9783 10

–

1.24

DIODE V

[]

–

1.24

-----------------------------------------------

⋅⋅

⋅

SS μs

[]

1075

μs

[]

SSOSC kΩ

[]

5.3816 10

–

⋅

-----------------------------------

1.24

DIODE V

[]

–

----------------------------------------------- V

⋅⋅

SSOSC kΩ

[]

5.3816 10

–

⋅

-----------------------------------

1.24

DIODE V

[]

–

-----------------------------------------------

BOOT

–

()

[]

⋅⋅

⎩

⎪

⎨

⎪

⎧

) if V

BOOT

()

) if V

BOOT

()

⎩

⎪

⎨

⎪

⎧

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