TI TPS65310AQRVJRQ1

The TPS65310A-Q1 is a power management unit designed to meet the requirements of automotive systems controlled by a DSP, such as advanced driver assistance systems. By integrating commonly used functions, the TPS65310A-Q1 significantly reduces board space and system cost. The device uses a high-voltage buck controller for pre-regulation, combined with two buck converters and one boost converter for post-regulation. Further integration of an LDO consolidates the power supply concept, providing a flexible system design with five independent voltage rails. The device offers a low-power state (LPM0 with all power rails off) to reduce current consumption when the system remains continuously connected to the battery line. All outputs are protected against overload and overtemperature. An external PMOS protection feature enables the device to withstand transient voltages up to 80V. This external PMOS can also be used in safety-critical applications to protect the system when a fault (undervoltage, overvoltage, or overcurrent) occurs on any one of the power rails. Internal soft-start ensures controlled startup of all power supplies. The output voltage of each power supply is adjustable via an external resistor network configuration.

• Qualified for automotive applications
• AEC-Q100 test results:
  • Device temperature grade 1: operating ambient temperature range -40°C to 125°C
  • Device HBM ESD classification level H1B
  • Device CDM ESD classification level C3B
• Input voltage range: 4V to 40V, transient up to 60V; up to 80V with external PMOS
• Single-output synchronous buck controller peak gate drive current 0.6A
• 490kHz fixed switching frequency
• Pseudo-random frequency hopping spread spectrum or triangle mode
• Dual synchronous buck converter
  • Designed for output current up to 2A
  • Out-of-phase switching
  • Switching frequency: 0.98 MHz
• Adjustable 350mA LDO
• Adjustable asynchronous boost converter
  • 1A integrated switch
  • Switching frequency: 0.98 MHz
• Soft-start for all regulator outputs
• Independent voltage monitoring
• UV detection and OV protection
• Short-circuit, overcurrent, and thermal protection for buck controller, gate driver, buck converter, boost converter, and LDO outputs
• SPI for control and diagnostics
• Integrated window watchdog (WD)
• Reference voltage output
• HS driver for external FET
• LED driver
• External temperature sensor input; IC shuts down at TA < -40°C
• Thermally enhanced package
  • 56-pin QFN (RVJ)

• Multi-rail DC power distribution systems
• Safety-critical automotive applications
• Advanced driver assistance systems