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XRP6142EL2-0-F Datasheet(PDF) 1 Page - Exar Corporation |
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XRP6142EL2-0-F Datasheet(HTML) 1 Page - Exar Corporation |
1 / 17 page X XR RP P6 61 14 42 2 S Sy yn ncch hrro on no ou us s S Stte ep p--D Do ow wn n C Co on nttrro olllle err w wiitth h D DD DR R M Me em mo orry y T Te errm miin na attiio on n March 2010 Rev. 1.0.0 Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 – Fax. +1 510 668-7001 GENERAL DESCRIPTION The XRP6142 is a synchronous step down switching controller for over 15 Amps point-of- loads converters and optimized to generate and support DDR I, II and III memory voltages requirements. Optimized to operate from standard 3.3V and 5V rails, the XRP6142 supports conversions down to 0.5V from an input voltage as low as 1V and can reach efficiencies of up to 96%. Based on a constant on-time control scheme and operating at a constant switching frequency over the whole input voltage range, it provides excellent load transient response while requiring no external compensation components. Three selectable on-time options allow for further switching frequency, solution footprint and efficiency optimization. Dedicated support for DDR I, II and II memories is also provided. The XRP6142 easily generates VDDQ (VDD) or VTT voltages while an on board buffer provides the buffered VTT reference voltage. Under-voltage Lock out, short-circuit and over-current and over-temperature protection insure safe operations under abnormal operating conditions. The XRP6142 is available in a compact RoHS compliant “green”/halogen free 16-pin QFN package. APPLICATIONS • High-Power Point-of-Loads Converters • Audio-Video Equipments • FPGA and DSP Power Supplies • DDR Memory Based Embedded Systems FEATURES • Over 15A Point-of-Load Capable − Down to 0.5V Output Voltage Conversion − Up to 96% Efficiency • Wide 1.0V-5.5V Input Voltage Range Conversions − Single Input 3.3V and 5V rails Operations • Constant On-Time Operations − Constant Frequency Operations − No External Compensation • DDR I, II & III Termination Support − VDDQ/VDD or VTT Voltages Generation − Buffered VTT Ref. Voltage Generation • Soft-Start and Enable Functions • UVLO, Short Circuit and Over Current Protection • RoHS Compliant “Green”/Halogen Free 3mm x 3mm 16-Pin QFN Package TYPICAL APPLICATION DIAGRAM Figure. 1: XRP6142 as a Step-Down Converter or a DDR Supply AGND VIN VOUT R1 R2 L1 PGND VCC EN VREF REFIN VIN BST FB Thermal Pad VTTREF VDDQ/2 SW ILIM GL CSGND GH XRP6142 CFF COUT QB QT CIN 3V-5.5V SP2996B VTT VIN GND ACNTL REF EN VOUT VDDQ VREF Operation as DDR Supply R3 R4 RLIM |
Similar Part No. - XRP6142EL2-0-F |
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Similar Description - XRP6142EL2-0-F |
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