• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
  • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
  • Device HBM ESD Classification Level 2
  • Device CDM ESD Classification Level C4B
• One High-VIN Step-Down Converter
  • 3.6- to 40-V Input Range
  • 250-mΩ High-Side MOSFET
    • 3.2-A Maximum Load Current, 1.1- to 20-V Output Adjustable
  • 100-kHz to 2.5-MHz Adjustable Switch-Mode Frequency
  • Less Than 140-µA Operating Quiescent Current
• One Low-Dropout Voltage Regulator (LDO)
  • 280-mA Current Capability With 28-μA (Typical) Operating Quiescent Current in No-Load Condition
  • Input Supply Auto-Source to Balance Efficiency and Low Standby Current
  • Power-Good Output (Push-Pull)
  • Low-Dropout Voltage of 300 mV at IOUT = 200 mA (Typical)
• Overcurrent Protection for Both Regulators
• Overtemperature Protection
• 14-Pin HTSSOP Package With PowerPAD™ Package

• Automotive Infotainment and Cluster
• Advanced Driver Assistance System (ADAS)
• Telematics

The TPS65320-Q1 device is a combination of a 40-V, 3.2-A, DC-DC step-down converter and a low-dropout (LDO) regulator. The DC-DC step-down converter, referred to as the buck regulator, has an integrated high-side MOSFET. The LDO regulator also has an integrated MOSFET and a low-input supply current of 28-μA (typical) in a no-load condition. Furthermore, the LDO regulator has an active-low, push-pull reset output pin. To reduce heat, the input supply of the LDO regulator can auto-source from the input voltage to the output of the buck regulator. The low-voltage tracking feature can eliminate the need to use a boost converter during cold-crank conditions.

The buck regulator has a switching frequency range from 100 kHz to 2.5 MHz that provides a flexible design to fix system requirements. The external loop compensation allows for optimization of the converter response for the appropriate operating conditions. A low-ripple pulse-skip mode reduces the no-load input supply current to less than 140 μA.

The device has built-in protection features such as soft start, current limit, thermal sensing, and shutdown because of excessive power dissipation. Furthermore, the device has an internal undervoltage-lockout (UVLO) function that turns off the device at a too-low supply voltage.