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

Thermal shutdown protection

Foldback current limiting

 Allows external Schottky diode

bypass of integrated diode bridges

without requiring CT/SP pin

connection

 Low-profile 5 x 5 mm 20-pin QFN

 RoHS-compliant