IRDC3894-P1V2 Datasheet, PDF (1/14 Pages) International Rectifier – USER GUIDE FOR IR3894 EVALUATION BOARD

SupIRBuck^TM
IRDC3894-P1V2
USER GUIDE FOR IR3894 EVALUATION BOARD
DESCRIPTION
1.2Vout
The IR3894 is a synchronous buck
converter, providing a compact, high
performance and flexible solution in a small
5mm X 6 mm Power QFN package.
Key features offered by the IR3894 include
internal Digital Soft Start/Soft Stop, precision
0.5Vreference voltage, Power Good,
thermal protection, programmable switching
frequency, Enable input, input under-voltage
lockout for proper start-up, enhanced line/
load regulation with feed forward, external
frequency synchronization with smooth
clocking, smart internal LDO and pre-bias
start-up.
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 and the current limit is thermally
compensated.
This user guide contains the schematic and bill
of materials for the IR3894 evaluation board.
The guide describes operation and use of the
evaluation board itself. Detailed application
information for IR3894 is available in the
IR3894 data sheet.
BOARD FEATURES
• V_in = +12V (+ 13.2V Max)
•V_out = +1.2V @ 0- 12A
• F_s=600kHz
• L= 0.51uH
• C_in= 4x10uF (ceramic 1206) + 1X330uF (electrolytic)
• C_out=8x22uF (ceramic 0805)
12/22/2011
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