LX13049中文资料Step-Down Buck Regulators数据手册Microchip规格书

描述 Description

A Current Mode PWM Buck regulator that switches to PFM mode under light loads. The entire regulator function is implemented with only a few, low cost external components. The LX13049 responds quickly to dynamic load changes using a high bandwidth error amplifier and internal compensation. Tight output voltage regulation is maintained with the temperature compensated 800mV, bandgap reference achieving +/-3.5% regulation tolerance for all line, load and thermal conditions. The output voltage is easily programmed, from 800mV to 90% of VIN with two external resistors. The regulator is capable of providing an output load current up to 1.25A and has no minimum load current requirement for stable operation. Current limit senses on a cycle-by cycle basis to protect the switch. Power conversion efficiency is maximized with PFM mode of operation and low regulator quiescent current. The LX13049 operational supply voltage range covers 4.0V to 6.0V, features include: power on delay; soft start to limit inrush currents and thermal shutdown during fault conditions. The 6-pin JEDEC MO-229 package provides a small form factor and low profile at 3x3x1mm with excellent power dissipation capability on surface mount PCB’s.  ROHS, PB Free-->  ROHS