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Automotive 5.6V to 40V, 1.2A Buck Converter with 3 LDOs and Protected Sensor Supply


Package | PIN: PWP | 24
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $4.14
10-24 $3.73
25-99 $3.48
100-249 $3.12
250-499 $2.91
500-749 $2.54
750-999 $2.20
1000+ $2.15


  • 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 H2
    • Device CDM ESD Classification Level C4B
  • Input VIN Range 5.6 V to 40 V, With Transients up to 45 V
  • 5.45-V Switch-Mode Regulator With Integrated High-Side Switch
    • Recommended Switch-Mode Frequency Range 2 MHz to 3 MHz
    • Overcurrent Protection and 1.2-A Peak Switch Current
  • One Linear Regulator 5 V ±2%
  • Two Linear Regulator Controllers With 3.3-V and 1.2 V ±2%
  • Status Indicator Output of IGN_EN Input
  • Soft Start on IGN_EN and EN
  • External Clock Input for Synchronization
  • Programmable Power-On-Reset Delay, Reset-Function Filter Timer for Fast Negative Transients
  • Voltage Supervisor for the Following Supplies
    • VREG, 3.3 V, 1.2 V
  • Thermally Enhanced 24-Pin HTSSOP or 24-Pin VQFN Package
  • Protected 5-V Sensor Supply Output, Which Tracks 3.3-V Supply

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Texas Instruments  TPS65301QPWPRQ1

The TPS65301-Q1 power supply is a combination of a single switch-mode buck power supply and three linear regulators. This is a monolithic high-voltage switching regulator with an integrated 1.2-A peak current switch, 45-V power MOSFET, one low-voltage linear regulator, two voltage-regulator controllers and a protected sensor supply.

The device has a voltage supervisor which monitors the output of the switch-mode power supply, the 3.3-V linear regulator, and the 1.2-V linear regulator. An external timing capacitor is used to set the power-on delay and the release of the reset output nRST. This reset output is also used to indicate if the switch-mode supply, the 3.3-V linear regulator supply, or the 1.2-V linear regulator supply is outside the set limits. The protected sensor supply 5VS tracks the 3.3-V linear regulator within the specified limits.

The TPS65301-Q1 device has a switching frequency range from 2 MHz to 3 MHz, allowing the use of low-profile inductors and low-value input and output ceramic capacitors. External loop compensation gives the user the flexibility to optimize the converter response for the appropriate operating conditions.

This device has built-in protection features such as soft start on IGN_EN ON or enables cycle, pulse-by-pulse current limit, thermal sensing, and shutdown due to excessive power dissipation.

For all available packages, see the orderable addendum at the end of the data sheet.