TPS55065-Q1

• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results
  • Device Temperature Grade 1: –40°C to
    +125°C Ambient Operating Temperature
    Range
  • Device HBM ESD Classification Level 1B
  • Device CDM ESD Classification Level C4B
• Switched-Mode Regulator
  • 5 V ±2%, Normal Mode
  • 5 V ±3%, Low-Power or Crossover Mode
• Switching Frequency, 440 kHz (Typical)
• Input Operating Range, 1.5 V to 40 V, (V_driver)
  • 500-mA Load-Current Capability
  • 200-mA Load-Current Capability Down to 2-V
    Input (V_driver)
  • 120-mA Load-Current Capability Down to
    1.5-V Input (V_driver)
• Enable Function
• Low-Power Operation Mode
• Switched 5-V Regulated Output on 5Vg With
  Current Limit
• Programmable Slew Rate and Frequency
  Modulation for EMI Consideration
• Reset Function With Deglitch Timer and
  Programmable Delay
• Alarm Function for Undervoltage Detection and
  Indication
• Thermally Enhanced Package for Efficient Heat
  Management

The TPS55065 is a switched-mode regulator with integrated switches for voltage-mode control. With the aid of external components (LC combination), the device regulates the output to 5 V ±3% for a wide input-voltage range.

The TPS55065 device offers a reset function to detect and indicate when the 5-V output rail is outside of the specified tolerance. This reset delay is programmable using an external timing capacitor on the REST terminal. Additionally, an alarm (A_OUT) feature is activated when the input supply rail V_driver is below a prescaled specified value (set by the A_IN terminal).

The TPS55065 device has a frequency-modulation scheme to minimize EMI. The clock modulator permits a modulation of the switching frequency to reduce interference energy in the frequency band.

The 5-Vg output is a switched 5-V regulated output with internal current limiting to prevent assertion of RESET when powering a capacitive load on the supply line. This function is controlled by the 5Vg_ENABLE terminal. If there is a short to ground on this output (5Vg output), the output self-protects by operating in a chopping mode. This does, however, increase the output ripple voltage on V_OUT during this fault condition.