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Texas Instruments LP875761-Q1 4-Phase DC/DC Buck Converter

Texas Instruments LP875761-Q1 4-Phase DC/DC Buck Converter is designed to meet the power-management requirements of the latest processors and platforms in various automotive power applications. The device contains four step-down DC/DC converter cores, which are configured as a 4-phase output in forced-PWM mode. The device is controlled by an I2C-compatible serial interface and by enable signals. The LP875761-Q1 supports remote differential-voltage sensing for multiphase outputs to compensate for IR drop between the regulator output and the point-of-load (POL), which improves the accuracy of the output voltage. The switching clock can be forced to PWM mode and also synchronized to an external clock to minimize the disturbances.

The Texas Instruments LP875761-Q1 supports load-current measurement without the addition of external current-sense resistors. The LP875761-Q1 device also supports programmable start-up and shutdown delays and sequences synchronized to enable signals. The sequences can also include GPIO signals to control external regulators, load switches, and processor reset. During start-up, the device controls the output slew rate to minimize output-voltage overshoot and inrush current.

Features

  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • –40°C to +125°C ambient operating temperature grade 1
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • 2.8V to 5.5V input voltage
  • 1.0V output voltage
  • Four high-efficiency step-down DC/DC converter cores
    • 16A (4A per phase) maximum output current
  • 3MHz switching frequency
  • Spread-spectrum mode and phase interleaving
  • Configurable General-Purpose I/O (GPIOs)
  • An I2C-compatible interface that supports standard (100kHz), Fast (400kHz), Fast+ (1MHz), and High-Speed (3.4MHz) modes
  • Interrupt function with programmable masking
  • Programmable Power-Good signal (PGOOD)
  • Output short-circuit and overload protection
  • Overtemperature warning and protection
  • Overvoltage Protection (OVP) and Undervoltage Lockout (UVLO)

Applications

  • Automotive infotainment
  • Cluster
  • Radar
  • Camera power applications

Functional Block Diagram

Block Diagram - Texas Instruments LP875761-Q1 4-Phase DC/DC Buck Converter
發佈日期: 2021-02-10 | 更新日期: 2022-03-11