LX13045A中文资料Step-Down Buck Regulators数据手册Microchip规格书

描述 Description

See LX7169CLD 3A Step-Down Converter as potential replacement.The LX13045A operates as a Current Mode, Synchronous 1.3MHz PWM Buck regulator with an adjustable output voltage. It provides up to 2 amps of DC current with no minimum load requirement. Few external components are necessary since the MOSFET switches and compensation components are internal to the IC. The LX13045A operational supply voltage range covers 4.5V to 6V. During start-up an internal UVLO keeps the output off until VIN reaches3.7V, VOUT is then ramped in the soft start mode to limit the supply inrush current. Tight output voltage regulation is achieved with the 800mv, ±2% reference to program VOUT from 800mV to 90% of VIN. The output response is fast fordynamic load changes using a high bandwidth error amplifier control loop. Power conversion efficiency is maximized with low RDSON of the MOSFET switches and small regulator quiescent current. The LX13045A features include: OVP monitoring at the feedback pin for +110% threshold detection; PGOOD indicator to externally signal when VOUT is within ±5% of nominal, and Thermal shutdown. The Current limit monitors the Switch pin load on a cycle by cycle basis for rapid protection during fault conditions. The 6 pin MO-229 package provides a small form factor with excellent power dissipation capability.  ROHS, PB Free-->  ROHS