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MAX15041 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX15041 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 18 page General Description The MAX15041 low-cost, synchronous DC-DC convert- er with internal switches delivers an output current up to 3A. The MAX15041 operates from an input voltage of 4.5V to 28V and provides an adjustable output voltage from 0.606V to 90% of VIN, set with two external resis- tors. The MAX15041 is ideal for distributed power sys- tems, preregulation, set-top boxes, television, and other consumer applications. The MAX15041 features a peak-current-mode PWM con- troller with internally fixed 350kHz switching frequency and a 90% maximum duty cycle. The current-mode con- trol architecture simplifies compensation design, and ensures a cycle-by-cycle current limit and fast response to line and load transients. A high-gain transconductance error amplifier allows flexibility in setting the external com- pensation by using a type II compensation scheme, thereby allowing the use of all ceramic capacitors. This synchronous buck regulator features internal MOSFETs that provide better efficiency than asynchro- nous solutions, while simplifying the design relative to discrete controller solutions. In addition to simplifying the design, the integrated MOSFETs minimize EMI, reduce board space, and provide higher reliability by minimizing the number of external components. The MAX15041 also features thermal shutdown and overcurrent protection (high-side sourcing and low-side sinking), and an internal 5V LDO with undervoltage lockout. In addition, this device ensures safe startup when powering into a prebiased output. Other features include an externally adjustable soft-start that gradually ramps up the output voltage and reduces inrush current. Independent enable control and power- good signals allow for flexible power sequencing. The MAX15041 is available in a space-saving, high- power, 3mm x 3mm, 16-pin TQFN-EP package and is fully specified from -40°C to +85°C. Applications Distributed Power Systems Wall Adapters Preregulators Set-Top Boxes Televisions xDSL Modems Consumer Products Features o Up to 3A of Continuous Output Current o ±1% Output Accuracy Over Temperature o 4.5V to 28V Input Voltage Range o Adjustable Output Voltage Range from 0.606V to 0.9 x VIN o Internal 170mΩ RDS-ON High-Side and 105mΩ RDS-ON Low-Side Power Switches o Fixed 350kHz Switching Frequency o Up to 93% Efficiency o Cycle-By-Cycle Overcurrent Protection o Programmable Soft-Start o Stable with Low-ESR Ceramic Output Capacitors o Safe Startup into Prebiased Output o Enable Input and Power-Good Output o Fully Protected Against Overcurrent and Overtemperature o VDD LDO Undervoltage Lockout o Space-Saving, Thermally Enhanced, 3mm x 3mm Package Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches ________________________________________________________________ Maxim Integrated Products 1 MAX15041 IN INPUT 12V BST OUTPUT 1.8V AT 3A LX PGND FB COMP EN VDD PGOOD PGOOD SS SGND Typical Operating Circuit Ordering Information 19-4815; Rev 1; 3/10 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. EVALUATION KIT AVAILABLE PART TEMP RANGE PIN- PACKAGE TOP MARK MAX15041ETE+ -40°C to +85°C 16 TQFN-EP* AGV + Denotes a lead(Pb)-free/RoHS-compliant package. * EP = Exposed pad. |
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