IRDC3831 Datasheet, PDF (1/16 Pages) International Rectifier – USER GUIDE FOR IR3831 EVALUATION BOARD

IRDC3831
SupIRBuck^TM
USER GUIDE FOR IR3831 EVALUATION BOARD
DESCRIPTION
The IR3831 is a synchronous buck
converter, providing a compact, high
performance and flexible solution in a small
5mmx6mm Power QFN package.
Key features offered by the IR3831 include
programmable soft-start ramp, Power Good,
thermal protection, programmable switching
frequency, tracking input, enable input, input
under-voltage lockout for proper start-up,
and pre-bias start-up.
An output over-current protection function is
implemented by sensing the voltage developed
across the on-resistance of the synchronous
rectifier MOSFET for optimum cost and
performance.
This user guide contains the schematic and bill
of materials for the IR3831 evaluation board.
The guide describes operation and use of the
evaluation board itself. Detailed application
information for IR3831 is available in the
IR3831 data sheet.
BOARD FEATURES
• V_in = +12V (13.2V Max)
• V_cc= +5V (5.5V Max)
• V_out = +0.75V @ 0- ±8A
• F_s = 400kHz
• L = 0.68uH
• C_in= 3x10uF (ceramic 1206) + 330uF (electrolytic)
• C_out= 8x22uF (ceramic 0805)
02/10/09
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