Features

 Pin-compatible replacement for

the obsolete Si3402-A

 IEEE 802.3 standard-compliant

solution, including pre-standard

(legacy) PoE support

 Highly-integrated IC enables

compact solution footprints

Minimal external components

Integrated diode bridges and

transient surge suppressor

Integrated switching regulator

controller with on-chip power

FET

Integrated dual current-limited

hotswap switch

 Programmable classification

circuit

 Incorporates switcher EMIreduction

techniques.

 Supports non-isolated and

isolated switching topologies

 Comprehensive protection

circuitry

Transient overvoltage

protection

Undervoltage lockout

Early power-loss indicator

Thermal shutdown protection

Foldback current limiting

 Low-profile 5 x 5 mm 20-pin QFN

 RoHS-compliant