SC417/SC427 TM 10A EcoSpeed Integrated FET Regulator with Programmable LDO POWER MANAGEMENT Features Description Power system: The SC417/SC427 is a stand-alone synchronous TM Input voltage 3V to 28V EcoSpeed buck regulator which incorporates Semtechs Integrated bootstrap switch advanced, patented adaptive on-time control architecture Programmable LDO output 200mA to provide excellent light-load ecffi iency and fast transient 1% reference tolerance -40 to +85 C response. It features integrated power MOSFETs, a boot- Selectable internal/external bias power supply strap switch, and a programmable LDO in a 5x5mm TM EcoSpeed architecture with pseudo-xfi ed fre - package. The device is highly efficient and uses minimal quency adaptive on-time control 15x20mm PCB area for a total converter solution. Refer to Logic input/output control page 16 for information on the C-SIM simulation tool. Independent control EN for LDO and switcher The SC417/SC427 supports using standard capacitor types Programmable V UVLO threshold IN such as electrolytic or special polymer, in addition to Power good output ceramic, at switching frequencies up to 1MHz. The pro- Selectable ultrasonic/power save methods grammable frequency, synchronous operation, and select- Protections able power-save provide high efficiency operation over a Over-voltage/under-voltage wide load range. In power-save mode, the minimum oper- TC compensated R sensed current limit DS(ON) ating frequency for the SC417 is 25kHz whereas the SC427 Thermal shutdown has no minimum. Output capacitor types High ESR SP, POSCAP, OSCON Additional features include internal soft-start, program- Ceramic capacitors mable cycle-by-cycle over-current limit protection, under Package 5x5mm, 32-pin MLPQ and over-voltage protections and soft shutdown. The Lead-free and halogen free device also provides separate enable inputs for the PWM RoHS and WEEE compliant controller and LDO as well as a power good output for the Applications PWM controller. Office automation and computing The wide input voltage range, programmable frequency, Networking and telecommunication equipment and programmable LDO make the device extremely efl xible Point-of-load power supplies and module replacement. and easy to use in a broad range of applications. Support is provided for single cell or multi-cell battery systems in addi- tion to traditional DC power supply applications. Typical Application Circuit E N A B LE /P S A V E R ILIM E N /P S V LX S E N A B LE LD O E N L ILIM P G O O D P G O O D TO N V O U T R TO N LX V O U T L1 V 5V S C 417/S C 427 V E X T /LD O R FB 1 C O U T + 1F FB B S T R FB 2 V IN V IN LX B S T A G N D P G N D C IN C B S T US Patent: 7,714,547 B2 2015 Semtech Corporation Rev 2.0 1SC417/SC427 Pin Configuration Ordering Information Device Package (1)(2) SC417MLTRT MLPQ-32 5X5 (1)(2) 32 31 30 29 28 27 26 25 SC427MLTRT MLPQ-32 5X5 Top V iew 1 24 (1)(2)(3) FB LX SC417MLTRC MLPQ-32 5X5 23 FB L 2 LX (1)(2)(3) SC427MLTRC MLPQ-32 5X5 A G N D P A D 1 V 5V 3 22 P G N D SC417EVB Evaluation Board 4 21 A G N D P G N D LX SC427EVB Evaluation Board P A D 3 V O U T 5 20 P G N D 6 19 V IN P G N D V IN Notes: P A D 2 7 V LD O 18 P G N D 1) Available in tape and reel only. A reel contains 3000 devices. B S T 8 17 P G N D 2) Pb-free, Halogen free, and RoHS/WEEE compliant. 3) Device has copper bond wires. 9 10 11 12 13 14 15 16 SC417 and SC427 MLPQ-32 5x5, 32 LEAD Marking Information S C 417 S C 427 yyw w yyw w xxxxxx xxxxxx xxxxxx xxxxxx yyww = Date Code yyww = Date Code xxxxxx = Semtech Lot Number xxxxxx = Semtech Lot Number xxxxxx = Semtech Lot Number xxxxxx = Semtech Lot Number = Copper Bond Wire (SC417MLTRC only) = Copper Bond Wire (SC427MLTRC only) 2 V IN E N L V IN TO N V IN A G N D D H E N /P S V LX B S T LX S D L ILIM P G N D P G O O D P G N D LX