SIP32433

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Vishay Siliconix

E22-0335. A, 15-Aug-2022

13

Document Number: 63175

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Fig. 36 - Over-Voltage Protection

INRUSH CURRENT, AND OVER-CURRENT PROTECTION

The SIP32433A and SIP32433B incorporate two protections against over-current:

• Adjustable slew rate (SR) for inrush current control

• Adjustable over-current protection / active current limit to protect against overload conditions

The over-current protection (OCP) is active also during soft start. The over-current protection circuit controls the switch

impedance to limit the current to the level programmed by the RSET resistor.

If the over-current condition persists for more than 6 ms (typ.), the switch shuts off and alert the drain FLG is asserted, pulling

the pin to GND.

VOUT

EN/UVLO

VIN

OVP Th reshold

OVP

Over Voltage

Over Voltage

Protection

Over Voltage

Protection

VSS

VIN

Turn-on delay

ISW

ON fr om OVP

Removal

OVP

PG

5V

VIN = 9 x Vss

at VIN ri sing

Vss rises

till 5V

tOVP

150ns/typ

OVP lag delay, < 2 us

COUT vo ltage drops

decreases per load discharge

PGD is pulled through a re sistor

to an ext ernal voltage source