DESCRIPTION
   The device iC-WD is a monolithic switching regulator with two downstream 5 V resp. 3.3 V linear regulators. In view of the high efficiency of the down converter for an input voltage range of 8 to 36 V, the iC-WD family is well-suited for industrial applications which require a stabilised 5 V resp. 3.3 V power supply with minimal power dissipation and few components.

FEATURES
♦ Input voltage 8 to 36 Vdc
♦ Highly efficient down converter
♦ Switching transistor and free-wheeling diode integrated
♦ Adjustment of the regulator cut-off current with external
   resistor
♦ Integrated 100 kHz oscillator without external components
♦ Switching frequency above the audible range
♦ Two downstream linear regulators with 200 mA/25 mA output
   current
♦ Three different output voltage combinations of 3.3 V version
   available (see Block Diagram)
♦ Small residual ripple with low capacitances in the µF range
♦ Fault message at overtemperature and undervoltage at
   current-limited open-collector output
♦ Shutdown of switching regulator at overtemperature
♦ Internal reference voltages
♦ ESD protection
♦ Low space requirement with SO8 resp. tiny DFN10 package
♦ Option: enhanced temperature range of -40 to 85 °C

APPLICATIONS
♦ 5 V resp. 3.3 V supply e.g. from
   24 V industrial network