L6714 datasheet(42/70 Pages) STMICROELECTRONICS

No de pièce	L6714

Description	4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs

PDF	70 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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Soft start

L6714

42/70

Soft start

L6714 implements a soft-start to smoothly charge the output filter avoiding high in-rush

currents to be required to the input power supply. The device increases the reference from

zero up to the programmed value in different ways according to the selected Operative

Mode and the output voltage increases accordingly with closed loop regulation.

The device implements Soft-Start only when all the power supplies are above their own turn-

on thresholds and the OUTEN pin is set free.

At the end of the digital Soft-Start, SS_END/PGOOD signal is set free. Protections are

active during this phase; Under Voltage is enabled when the reference voltage reaches 0.6V

while Over Voltage is always enabled with a threshold dependent on the selected Operative

Mode or with the fixed threshold programmed by ROVP (See “Over voltage and

programmable OVP” Section).

Figure 14. Soft start

OUTEN

SS_END

Intel Mode

VOUT

T1 T2 T3 T4

TSS

OUTEN

PGOOD

AMD 6BIT Mode

VOUT

TSS

OVP

L6714 Fiches technique(PDF) 42 Page - STMicroelectronics