Si3500

Si3500 50 V INPUT DC TO DC CONVERTER Features forNotNeRwecDoesmigmnesnded NC FB  Integrated switching regulator  Supports non-isolated and controller with on-chip power FET isolated switching topologies  Input range 42 to 57 V  Output can be set from 1.8 to 12 V  Output power up to 10 W  Highly-integrated IC enables compact solution footprints  Comprehensive protection circuitry Transient overvoltage protection Undervoltage lockout Thermal shutdown protection Short circuit protection  50% duty cycle limiting Minimal external components  Low-profile, 5x5 mm, 20-pin QFN Integrated transient surge  RoHS-compliant suppressor Integrated dual current-limited hotswap switch Integrated switching power FET Applications  3.3 V power supply generation  Internet appliances for Power over Ethernet Power  Network devices Sourcing supply, such as Si3452 Description The Si3500 is a highly-integrated, high-voltage (42 to 57 V) input dc-to-dc converter with integrated PWM control and power FET. The output can be adjusted for various applications in the range of 1.8 to 12 VDC. The integrated hot swap switch provides a 2-level current limit for slow charging of the input filter capacitor followed by overcurrent protection at 400 mA. The hot swap switch overcurrent protection fully protects the Si3500 from short-circuit damage as long as the inductor does not saturate. For situations where it is desirable to use a smaller inductor, it is possible to re...