High-side load switch with adjustable current limit
The Vishay SIP32433BDN-T1E4 is a single-channel, high-side N-channel load switch in a 10-VFDFN exposed-pad package (10-DFN, 3x3 mm). It handles a continuous load current of 3.5 A with a typical on-resistance of 78 mOhm, covering load voltages from 2.8 V to 23 V. The switch is controlled by a single On/Off input (non-inverting) and does not require a separate Vcc supply rail — it powers itself from the load voltage. Key features include Auto Restart, Power Good flag, and Slew Rate Controlled turn-on, plus a full fault-protection suite: adjustable current limiting, over-temperature, over-voltage, short-circuit, and undervoltage lockout (UVLO).
78 mOhm Rds(on) — thermal budget at 3.5 A
At 3.5 A continuous, the 78 mOhm typical Rds(on) produces about 0.96 W of conduction loss (I²R). If your load is pulsed or derated, the margin improves; for sustained 3 A+ operation, budget for a copper pour under the pad and thermal vias. Compared to the SIP32434BDN-T1E4 sibling (33 mOhm, 6 A), this part trades lower current capacity for a slightly higher on-resistance — still adequate for most 3 A-class distribution rails.
Adjustable current limit — set the trip point with one resistor
The adjustable current limit (part of the fault-protection block) lets you set the overcurrent threshold with a single external resistor to ground. This is the feature that distinguishes the SIP32433BDN-T1E4 from fixed-limit load switches — it gives the designer control over the trip point to match the downstream load's inrush and fault characteristics. The protection set also includes over-temperature, over-voltage, short-circuit, and UVLO, so the switch can serve as a standalone power-domain supervisor without an external controller.
The active status is confirmed at the time of this listing; always cross-check the latest PCN before committing a long-term BOM, but the risk profile is low.