28-V Integrated Buck Regulator - Vishay Siliconix
Description
SiC417
Vishay Siliconix
microBUCKTM SiC417
10-A, 28-V Integrated Buck Regulator with Programmable LDO
DESCRIPTION
The Vishay Siliconix SiC417 is an advanced stand-alone synchronous buck regulator featuring integrated power MOSFETs, bootstrap diode, and a programmable LDO in a space-saving MLPQ 5 x 5 - 32 pin package.
The SiC417 is capable of operating with all ceramic solutions and switching frequencies up to 1 MHz.
The programmable frequency, synchronous operation and selectable power-save allow operation at high efficiency across the full range of load current.
The internal programmable LDO may be used to supply 5 V for the gate drive circuits or it may be bypassed with an external 5 V for optimum efficiency and used to drive external N-channel MOSFETs or other loads.
Additional features include cycle-by-cycle current limit, voltage soft-start, under-voltage protection, programmable over-current protection, soft shutdown and selectable power-save.
The Vishay Siliconix SiC417 also provides an enable input and a power good output.
FEATURES
• High efficiency > 92 % • Internal power MOSFETs: High-side RDS(ON) = 27 mΩ Low-side RDS(ON) = 9 mΩ • Integrated bootstrap diode • Integrated configurable 150 mA LDO with bypass logic • Temperature compensated current limit • Pseudo fixed-frequency adaptive on-time control • All ceramic solution enabled • Programmable input UVLO threshold • Independent enable pin for switcher and LDO • Selectable ultra-sonic power-save mode • Internal soft-start and soft-shutdown • 1 % internal reference voltage • Power good output and over voltage protection • Halogen-free according to IEC 61249-2-21 definition • Compliant to RoHS directive 2002/95/EC
PRODUCT SUMMARY
Input Voltage Range Output Voltage Range Operating Frequency Continuous Output Current Peak Efficiency Package 3 V to 28 V 0.
5 V to 5.
5 V 200 kHz to 1 MHz 10 A 95 % at 300 kHz MLPQ 5 mm x 5 mm
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APPLICATIONS
• • • • • • Notebook, desktop and server computers Dig...
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