资 源 简 介
The TC1313 combines a 500 mA synchronous buckregulator and 300 mA Low-Dropout Regulator (LDO)to provide a highly integrated soluTIon for devices thatrequire mulTIple supply voltages. The unique combinaTIonof an integrated buck switching regulator and lowdropoutlinear regulator provides the lowest systemcost for dual-output voltage applicaTIons that requireone lower processor core voltage and one higher biasvoltage.The 500 mA synchronous buck regulator switches at afixed frequency of 2.0 MHz when the load is heavy,providing a low-noise, small-size solution. When theload on the buck output is reduced to light levels, itchanges operation to a Pulse Frequency Modulation(PFM) mode to minimize quiescent current draw fromthe battery. No intervention is necessary for smoothtransition from one mode to another.The LDO provides a 300 mA auxiliary output thatrequires a single 1 μF ceramic output capacitor,minimizing board area and cost. The typical dropoutvoltage for the LDO output is 137 mV for a 200 mAload.The TC1313 is available in either the 10-pin DFN orMSOP package.Additional protection features include: UVLO,overtemperature and overcurrent protection on bothoutputs.For a complete listing of TC1313 standard parts,consult your Microchip representative.
