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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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SC414EVB 데이터시트(PDF) 1 Page - Semtech Corporation |
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SC414EVB 데이터시트(HTML) 1 Page - Semtech Corporation |
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1 / 29 page  © 2009 Semtech Corporation 1 SC414/SC424 6A Integrated FET Regulator with 5V LDO Features Input voltage — 3V to 28V Internal power MOSFETs — 6A Integrated bootstrap switch Smart power-save protection Integrated 5V, 150mA LDO with bypass capability TC compensated R DS(ON) sensed current limit Pseudo-fixed frequency adaptive on-time control Designed for use with ceramic capacitors Programmable V IN UVLO threshold Independent enable for switcher and LDO Selectable ultrasonic power-save (SC414) Selectable power-save (SC424) Internal soft-start and soft-shutdown at output Internal reference — 1% tolerance Over-voltage and under-voltage fault protection Power good output SmartDriveTM Lead-free 4x4mm, 28 Pin MLPQ package Fully WEEE and RoHS compliant, and halogen free Applications Notebook, desktop, tablet, and server computers Networking and telecommunication equipment Printers, DSL, and STB applications Embedded applications Power supply modules Point of load power supplies Description The SC414/SC424 is a stand-alone synchronous buck regu- lated power supply. It features integrated power MOSFETs, a bootstrap switch, and a 5V LDO in a space-saving MLPQ- 4x4mm 28-pin package. The device is highly efficient and uses minimal PCB area. It uses pseudo-fixed frequency adaptive on-time operation to provide fast transient response. The SC414/SC424 supports using standard capacitor types such as electrolytic or special polymer, in addition to ceramic, at switching frequencies up to 1MHz. The pro- grammable frequency, synchronous operation, and select- able power-save provide high efficiency operation over a wide load range. Additional features include cycle-by-cycle current limit, soft-start, under and over-voltage protection, program- mable over-current protection, soft shutdown, and select- able power-save. The device also provides separate enable inputs for the PWM controller and LDO as well as a power good output for the PWM controller. The input voltage can range from 3V to 28V. The wide input voltage range, programmable frequency, and 5V LDO make the device extremely flexible and easy to use in a broad range of applications. It can be used for single cell or multi-cell battery systems in addition to traditional DC power supply applications. The 5V LDO or an external 3.3V to 5V supply can be used to provide the bias voltage for the SC414/SC424. When the SC414/SC424 is used as a 5V output switching regula- tor, the 5V LDO can be used as an initial bias supply for the device. Once the switch regulator output is in the switch over range, the LDO will be bypassed by the switcher output for optimum efficiency. September 11, 2009 POWER MANAGEMENT |
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