XR77103-A0R5 Datasheet | Exar

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 ponent 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 500k Hz, 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 pensation 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 supplies - - Applications processor power REV1A 1/19 Typical Application PGOOD 28 VIN Start-up BGR 46 VIN VCC Internal Supply 24 PGOOD PGOOD SYNC 25 VIN = 5.5 to 14V 10 VIN1 15 VIN2 31 VIN3 VOUT3 = 0.8 to 6V 32 BST3 30 LX3 29 LX3 1 VFB3 2 P3 BUCK3 BUCK1 BST1 9 LX1 12 LX1 11 VFB1 8 P1 7 BST2 16 LX2...