iC-WD Switched-Mode Dual 5 V Regulator for 8 V to 36 V - iC-Haus - #1

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iC-WD A/B/C SWITCHED-MODE DUAL VOLTAGE REGULATOR Rev D1, Page 1/12 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/25mA output current © Three different output voltage combinations of 3.3V version available (see Block Diagram) © Small residual ripple with low capacitances in the ìF 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. 3.3V supply e.g. from 24 V industrial network PACKAGES SO8 (optional with thermal pad) DFN10 BLOCK DIAGRAM VB (8...36 V) ERROR (200 mA) RVB 1W 220mH LVH CVH 4.7mF 1mF CVCCA 4.7mF ERROR DETECTION iC-WD VREF VH SWITCHING CONVERTER OSCILLATOR TEMPERATURE UNDERVOLTAGE REFERENCE VCC REGULATOR VCCA REGULATOR 4.7mF WDC WDB WDA WD CVCC VCC +5 V +3.3 V +3.3 V +5 V VCCA +5 V +3.3 V +5 V +3.3 V 1 NER GND 4 VCCA 7 VCC 6 VH 5 VB 8 VBR 2 VHL 3 (25 mA) Pin numbers for SO8 package Copyright © 2007 iC-Haus http://www.ichaus.com