器件名称:
LM20143MHX
功能描述:
3A, PowerWise
文件大小:
703.59KB 共20页
简 介:
LM20143 3A, PowerWise Adjustable Frequency Synchronous Buck Regulator January 16, 2008 LM20143 3A, PowerWise Adjustable Frequency Synchronous Buck Regulator General Description The LM20143 is a full featured adjustable frequency synchronous buck regulator capable of delivering up to 3A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems. The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit. The frequency of this device can be adjusted from 500 kHz to 1.5 MHz by connecting an external resistor from the RT pin to ground. The LM20143 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20143 is pre-biased ……
