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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC418 датащи(PDF) 1 Page - Semtech Corporation |
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SC418 датащи(HTML) 1 Page - Semtech Corporation |
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1 / 30 page  © 2010 Semtech Corporation 1 SC418 EcoSpeedTMDC-DC Buck Controller with Programmable LDO Features Power system Input voltage — 3V to 28V Integrated bootstrap switch Programmable LDO output — 200mA 1% reference tolerance -40 to +85 °C Selectable internal/external bias power supply EcoSpeedTM architecture with pseudo-fixed fre- quency adaptive on-time control Logic input/output control Independent control EN for LDO and switcher Programmable V IN UVLO threshold Power good output Selectable power save mode Programmable ultrasonic power save mode Protections Over-voltage/under-voltage TC compensated R DS(ON) sensed current limit Thermal shutdown Smart power save Output capacitor types High ESR — SP, POSCAP, OSCON Ceramic capacitors Package — 3 x 3mm, 20-pin MLPQ Lead-free and halogen free RoHS and WEEE compliant Applications Office automation and computing Networking and telecommunication equipment Point-of-load power supplies and module replacement • • • • • • • • • • • • • • • • • Description The SC418 is a synchronous EcoSpeedTM buck regulator which incorporates Semtech’s advanced, patented adap- tive on-time control architecture to provide excellent light-load efficiency and fast transient response. It fea- tures an integrated bootstrap switch and programmable LDO in a 3 x 3mm package. The device is highly efficient and uses minimal PCB area. The SC418 supports using standard capacitor types such as electrolytic or special polymer, in addition to ceramic, at switching frequencies up to 1MHz. The programmable frequency, synchronous operation, and programmable 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, selectable power-save modes, and programmable ultrasonic 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 pro- grammable LDO make the device extremely flexible and easy to use in a broad range of applications. Support is provided for single cell or multi-cell battery systems in addition to traditional DC power supply applications. July 27, 2010 POWER MANAGEMENT Typical Application Circuit VDDA PGOOD EN TON ENL 1µF VEXT or VLDO PGND AGND VLDO ENABLE LDO RTON SC418 VDDP VLDO FBL 0.1µF 1µF ENABLE PGOOD PSV PSV LX ILIM RILIM + VOUT COUT L1 VOUT FB CIN DH BST DL VIN VIN VEXT or VLDO |
Аналогичный номер детали - SC418 |
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Аналогичное описание - SC418 |
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