XR77103EVB-A1R0

XR77103-A1R0 Universal PMIC 3-Output Buck Regulator Description FEATURES The XR77103-A1R0 universal PMIC features three 2A synchronous 4.5V to 14V wide input supply high-efficiency, buck regulators with integrated power switches. They voltage range Built-in MOSFET and synchronous rectifier can operate in 5V, 9V and 12V powered systems with minimal required 0.8V, high accuracy reference (1%) external component thus providing the smallest size solution possible. Current-mode control with simple Two of the outputs may be paralleled for output currents up to 5A peak compensation circuit with steady state current of up to 4A. External synchronization The output voltage of each converter can be adjusted by external Power good Protection resistor divider down to voltage as low as 0.8V. With a nominal Thermal shutdown switching frequency of 1MHz, the regulators can also be synchronized Overvoltage transient protection to an external clock in applications where EMI control is critical. Overcurrent protection XR77103-A1R0 features a supervisor circuit that monitors each 32-pin 4mm x 4mm TQFN package converter output. PGOOD pin is asserted once sequencing is done, APPLICATIONS outputs are reported in regulation and the reset timer expires. FPGA and DSP supplies The polarity of the signal is active high. A pulse skipping mode (PSM) Video processor supplies reduces switching losses maintaining high efficiency when the system Applications processor power is unloaded or in standby mode. REV1D 1/19XR77103-A1R0 Typical Application PGOOD 28 4 6 24 VIN VIN VCC PGOOD SYNC Start-up Internal 25 PGOOD OSC BGR Supply BST1 V = 5.5 to 14V VIN1 IN 9 10 VIN2 LX1 12 15 V = 0.8 to 6V OUT1 VIN3 LX1 31 11 BUCK1 VFB1 8 BST3 32 COMP1 7 LX3 30 BST2 V = 0.8 to 6V OUT3 16 LX3 29 BUCK3 LX2 14 VFB3 1 V = 0.8 to 6V OUT2 LX2 13 BUCK2 COMP3 2 VFB2 17 COMP2 18 XR77103-A1R0 EN AGND DGND GND 26 27 19 5 EP Figure 1. Typical Application REV1D 2/19