Si3500
50 V INPUT DC TO DC CONVERTER
Features
forNotNeRwecDoesmigmnesnded NC FB
Integrated switching regulator S...
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...