LX1675CLQ. Triple Synchronous PWM and LDO Controller. New Product Information and Sales Kit. Manufactured by:
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1 Triple Synchronous PWM and LDO Controller Manufactured by: Microsemi Integrated Products Group Garden Grove, CA Telephone: More than solutions enabling possibilities
2 INTRODUCTION DESCRIPTION The LX1675 is a highly integrated power supply controller IC combining three voltage mode PWM switching regulator stages with an additional onboard linear regulator driver. Included on the IC are many features which simplify the design and lower the total system cost: such as internal MOSFET Drivers, Current limit without requiring a sense resistor, Soft start for fully controlled power sequencing, selectable PWM frequency, UVLO, Hiccup mode to limit power dissipation under fault conditions, and single supply voltage spanning a wide range, assembled in a small-footprint RoHS compliant / Pb-free package. Protected by U.S. Patents 6,285,571 and 6,292,378 Copyright 2001 Page 2
3 KEY PRODUCT INFORMATION VIN 4.5V to 24V VOUT4 KEY FEATURES VIN VSLR LDGD LDFB SSX AGND EOX VCCL LX1675 HOX VCX HRX CSX LOX PGX FBX 5µh ONE OF 3 PWM SECTIONS VOUT1, 2, 3 Input range voltage 4.5 to 24V Maximum DC Load output current, 15A (actually only limited by MOSFET current rating and the amount of MOSFET gate charge which is driven by the LX1675) Power Conversion Efficiency up to 95% Full Power Sequencing Control Output Voltage Programmable from 800mV to 75%Vsupply User Selectable PWM frequency of 300Khz or 600Khz No external sense resistor needed for PWM current limit No external power Schottky diode, Synchronous solution eliminates diode Internal Protection includes: o Thermal shutdown o Cycle by cycle switch current limit o UVLO o Short circuit RoHS Compliant / Pb-free Copyright 2001 Page 3
4 TYPICAL APPLICATION APPLICATIONS DC to DC conversion requiring 300ma to 15A Any Point of Load Regulation, for example, Vout of: 3.3V, 2.5V, 1.8V, 1.2V (requirements found for memory, microprocessors, ASICS, DSP, etc.) o Set Top Box / Cable TV Decoders o DSL Gateway Equipment o Video Cards Lower power 500mW to 20W input power applications Copyright 2001 Page 4
5 COMPETITIVE ANALYSIS LX1675 Competitor Microsemi TI Intersil International Rectifier Device LX1675 TPS5130P T ISL6441 IR3094 V IN Range 4.5 to 24V 4.5 to 28V 5.6 to 24V 8 to 16V PWM OP / Freq 3 / 300 or 600Khz 3 / 500Khz max LDO Outputs TA Range Features +1 0 to 85 C 1-40 to 85 C PFM Option 2 / 1.4Mhz 1-40 to 85 C 3 / 100K- 500Khz Alternative Microsemi Solutions 0 to 125 C Device Description Notes LX1910CDU LX1911CLM LX1918 PWM Synchronous PWM UVLO, Pwr Sequencing (SS), Short Ckt Protection, Thermal SD UVLO, Enable, Pwr Good, SS, Hiccup Single output, both non-synchronous, LX1910 features external compensation, LX1911 offers simple design, lower cost Single output Copyright 2001 Page 5
6 SALES STRATEGY Target any customers needing multiple regulated outputs that have increasing output current demands and are presently using LDO regulators. Here power dissipation problems can be solved. Customers already using multiple single PWM s, offer integration and lower cost with the 4 output LX1675. Set top box market is ideal target market. PC video cards also have demands for multiple outputs and high current. Copyright 2001 Page 6
7 SUMMARY Pricing Device Package Disty Cost K LX1675CLQ 38 Lead 5x7mm LQ (code) $1.63 $1.87 $1.03 Availability Options Samples: Production: Packages: Ambient Temperature: Technical Support Datasheet: Now Now Application Note: Evaluation Board: Factory Contacts Technical Questions: Marketing Manager: Plastic MLPQ 38 Pin 0 C to 85 C See Data Sheet Available, contact factory Richard Johnson rjohnson@microsemi.com Richard Johnson rjohnson@microsemi.com Copyright 2001 Page 7
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