SLVSCQ9E November 2014 – March 2022 TPS65400
PRODUCTION DATA
The TPS65400 implements a PMBus-I2C-compatible digital interface. It helps Core Chip optimize system performance by run-time changing regulated voltage, power sequence, phase interleaving, operating frequency, read back operating status, and so forth.
The TPS65400 consists of four high-current buck switching regulators (SW1, SW2, SW3, and SW4) with integrated FETs. The switching power supplies are intended for powering high-current digital circuits such as the processor, FPGA, ASIC, memory, and digital I/Os. SW1 and SW2 support 4 A each, and SW3 and SW4 support 2 A each. The switching frequency of each regulator is independently adjustable up to 2.2 MHz.
Current limit programmability on each switcher enables optimization of inductor ratings for a particular application configuration not requiring the maximum current capability.
The TPS65400 can be powered from a single-input voltage rail between 4.5 and 18 V, making it suitable for applications running off a 5- or 12-V intermediate power distribution bus.
Sequencing requirements can be met using the individual enable terminals or by programming the sequence through the I2C bus into the on-board EEPROM. Output voltages can be set through external resistor networks and VREF can be programmed from 0.6 V to 1.87 V in 10-mV steps. All control and status info can be accessed through a PMBus-compatible I2C bus.
The TPS65400 provides a high level of flexibility for monitoring and control through the I2C bus while providing the option of programmability through the use of external components and voltage levels for systems not using I2C.