3A, ULTRA LOW DROPOUT (0.23V@3A) LINEAR REGULATOR
DESCRIPTION
The UTC LXXLD32 is a typical LDO with the features of very low
dropout voltage as low as 0.23V at output current 3A.
For normal operation, two supply voltages are necessary. One called control voltage from other equipment can shutdown the output voltage and it should pull and hold the voltage of EN pin less than 0.5V. Another one is the main supply voltage whose purpose is for main power conversion, to keep the power dissipation low, and to make the dropout voltage lower.
Internally, in the UTC LXXLD32, 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 LXXLD32 can be used as an ideal to provide well supply voltage in the applications, such as front-side-bus termination on motherboard, NB applications, front side bus VTT (1.2V/3A) and note book PC applications.
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