28 V Integrated Buck Regulator - Vishay Siliconix
Description
SiC414
Vishay Siliconix
microBUCKTM SiC414
6 A, 28 V Integrated Buck Regulator with 5 V LDO
DESCRIPTION
The Vishay Siliconix SiC414 is an advanced stand-alone synchronous buck regulator featuring integrated power MOSFETs, bootstrap switch, and an internal 5 V LDO in a space-saving MLPQ 4 x 4 - 28 pin package.
The SiC414 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 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 softstart, under-voltage protection, programmable over-current protection, soft shutdown and selectable power-save.
The Vishay Siliconix SiC414 also provides an enable input and a power good output.
FEATURES
• • • • • • • • • • • • • • High efficiency > 95 % 6 A continuous output current capability Integrated bootstrap switch Integrated 5 V/200 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.
75 V to 5.
5 V 200 kHz to 1 MHz 6A 95 % at 300 kHz MLPQ 4 mm x 4 mm
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APPLICATIONS
• • • • • • Notebook, desktop and server computers Digital HDTV and digital consumer applications Networking and tele...
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