LX12973中文资料Step-Down Buck Regulators数据手册Microchip规格书

描述 Description

The LX12973 operates as a Current Mode PWM Buck regulator that switches to PFM mode with light loads. The entire regulator function is implemented with few externalcomponents. The LX12973 responds quickly to dynamic load changes using a high bandwidth error amplifier and internal compensation. Tight output voltage regulation is maintained with the compensated 800mV, +/-2% reference (line and temp regulation). With two external resistors the output voltage is easily programmed, from 800mV to 90% of Vin.The regulator is capable of providing an output load current of 1.5A, has no minimum load current requirement for stable operation. Current limit is cycle-by-cycle to protect the switch. Power conversion efficiency is maximized with low low regulator IQ and PFM mode of operation The LX12973 operational 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 MO-229 package provides a small form factor with excellent power dissipation capability.  ROHS, PB Free-->  ROHS