XR77103-A0R5

XR77103-A0R5 Universal PMIC 3-Output Buck Regulator Description The XR77103-A0R5 universal PMIC features three 2A synchronous high-efficiency, buck regulators with integrated power switches. They can operate in 5V, 9V and 12V powered systems with minimal required external component thus providing the smallest size solution possible. Two of the outputs may be paralleled for output currents up to 5A peak with steady state current of up to 4A. The output voltage of each converter can be adjusted by external resistor divider down to voltage as low as 0.8V. With a nominal switching frequency of 500kHz, the regulators can also be synchronized to an external clock in applications where EMI control is critical. XR77103-A0R5 features a supervisor circuit that monitors each converter output. PGOOD pin is asserted once sequencing is done, outputs are reported in regulation and the reset timer expires. The polarity of the signal is active high. A pulse skipping mode (PSM) reduces switching losses maintaining high efficiency when the system is unloaded or in standby mode. FEATURES ■■ 4.5V to 14V wide input supply voltage range ■■ Built-in MOSFET and synchronous rectifier ■■ 0.8V, high accuracy reference (1%) ■■ Current-mode control with simple compensation circuit ■■ External synchronization ■■ Power good ■■ Protection Thermal shutdown Overvoltage transient protection Overcurrent protection ■■ 32-pin 4mm x 4mm TQFN package APPLICATIONS ■■ FPGA and DSP supplies ■■ Video processor supplie...