LXXLD38中文资料3A ULTRA LOW DROPOUT LINEAR REGULATOR数据手册UTC规格书

描述 Description

The UTC LXXLD38 is a typical LDO with the

特性 Features

of very low dropout voltage as low as 0.20V at output current 3A. For normal operation, two supply voltages are necessary. Onecalled control voltage from other equipment can shutdown the output voltage and it should pull and hold the voltage of EN pin less than 0.4V. Another one is the main supply voltage whose purpose is for main power conversion, to keep the power dissipation low, andto make the dropout voltage lower. Internally, in the UTC LXXLD38, there’re many functions which can be seen in the block figure to prevent the IC from being damaged. Internal Power-On-Reset (POR) circuit can control the two supply voltages to prevent fault operations of the circuit; the thermal shutdown circuit is able to protect the device from over thermal operation, and a current limit function will keep the device work safely under current over-loads. The UTC LXXLD38 can be used as an ideal to provide wellsupply voltage in the applications, such as front-side-bus termination on motherboard, NB applications, front side bus VTT(1.0V/3A) and note book PC applications.  FEATURES  Low Dropout VD=0.20V(typ.)@ IOUT=3ALow ESR Output CapacitorVREF=0.5VFast Transient ResponseOutput Voltage Adjustable through External ResistorsPOR(Power-On-Reset) controlling VCNTL and VINWith internal Soft-StartInternal Current Limit ProtectionInternal Under Voltage ProtectionHysteretic Thermal ShutdownWith Power-OK Output (with a Delay Time)Low Shutdown Quiescent Current (<30µA)Shutdown/Enable Control Function