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SC3303 Datasheet(PDF) 1 Page - Semtech Corporation |
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SC3303 Datasheet(HTML) 1 Page - Semtech Corporation |
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1 / 26 page  © 2011 Semtech Corporation 1 POWER MANAGEMENT 1 SC3303 3A EcoSpeed® Step-Down Regulator with LDO and Ultrasonic Power Save Typical Application Circuit Rev. 2.0 Features Input voltage — 5.5V to 28V Output voltage — 0.75V to 7.5V Output current — Up to 3A Internal reference — + 1% Small ceramic capacitors Power good pin (open-drain) Adaptive on-time control: Excellent transient response Programmable pseudo-fixed frequency during CCM Fault protection features: Cycle-by-cycle current limit Short circuit protection Over and under output voltage protection Over-temperature Internal soft-start Ultrasonic power save and smart PSAVE Internal LDO for bias voltage Ultra-small lead-free 3 x 3(mm), 10-Pin MLPD package WEEE and RoHS compliant and halogen free Applications Networking Equipment, Embedded Systems Medical Equipment, Office Automation Instrumentation, Portable Systems Consumer Devices such as DTV and Set-top Boxes POL Converters • • • • • • Description The SC3303 is an integrated, synchronous 3A EcoSpeed ® step-down regulator. It incorporates Semtech’s advanced, patented adaptive on-time architecture to achieve best- in-class dynamic performance using point-of-load appli- cations. The input voltage range is 5.5V to 28V with a programmable output voltage from 0.75V up to 7.5V. The device features an internal LDO and ultrasonic PSAVE mode for high efficiency across the output load range. Adaptive on-time control provides programmable pseudo-fixed frequency operation in continuous conduc- tion and excellent transient performance. The switching frequency can be set from 200kHz to 1MHz, allowing the designer to reduce external LC filtering and minimize light load (standby) losses. Additional features include cycle-by-cycle current limit, soft start, input UVLO and output OV protection, and over temperature protection. The open-drain PGOOD pin pro- vides output status. Standby current is less than 10μA when disabled. The device is available in a low profile, thermally enhanced MLPD 3 x 3mm 10-pin package. SC3303 EN VIN TON LDO LX BST VOUT Enable VIN FB PGOOD CIN CLDO2 RTON L1 CBST COUT RTOP RBOT PGOOD CLDO1 PGND AGND |
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