PM8903

PM8903 3 A step-down monolithic switching regulator Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Integrated 35 mΩ MOSFETs for high efficiency 3 A continuous output current 2.8 V to 6 V input voltage (VIN) 2.9 V to 5.5 V supply voltage (VCC) Adjustable output voltage down to 0.6 V 1% output voltage accuracy 1.1 MHz switching frequency operation PSKIP mode to optimize light load efficiency Embedded bootstrap diode Thermally compensated loss-less current sense across HS and LS MOSFETs OV/UV/OC and overtemperature protection Internal soft-start and soft-stop Interleaving synchronization (Up to 2 ICs) Power Good output Shutdown function (<15 μA quiescent current) VFQFPN16 3 x 3 mm compact package VFQFPN16 3x3 mm Description The PM8903 is a high efficiency monolithic stepdown switching regulator designed to deliver up to 3 A continuous current. The IC operates from 2.8 V to 6 V input voltage (VIN). The PM8903 features low-resistance integrated nMOS and proprietary pulse-skipping mode for optimum efficiency over all the loading range. The voltage mode control loop allows the widest range of output filter. Current sense is internally thermally compensated for optimum precision. The integrated 0.6 V reference allows the regulation of output voltages with ±1% accuracy over temperature variations. Switching frequency is typically set to 1.1 MHz and can be programmed to 0.8 MHz or 1.0 MHz. Out of phase synchronization allows the reduction of input RMS current. The PM8903 provides precise d...