AN2787 datasheet(33/37 Pages) STMICROELECTRONICS

поискавой системы для электроныых деталей

AN2787 датащи(PDF) 33 Page - STMicroelectronics

номер детали	AN2787

подробное описание детали	Monolithic VR demonstration board for chipset

PDF	37 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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33 / 37 page

AN2787

STEVAL-ISA050V1 evaluation tests

33/37

10.8

SW regulators current limit

Cycle-by-cycle the high-side MOSFET current is monitored and if it's higher than the

programmed current limit, the high-side MOSFET is immediately turned off.

Figure 38.

1.5 V rail output voltage, 1.5 V inductor current and output current, peak

current limit reached

10.9

Soft-end

Each SW regulator, when turned off, performs the output voltage soft-end by turning off the

power MOSFET and turning on the discharge MOSFET. When the output voltage is lower

than about 300 mV, the low-side power MOSFET is turned on. VTTREF and VTT can track

half of VDDQ also during the soft off.

These rails are allowed two different modes of discharge: tracking and nontracking

discharge.

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