Automotive wide-VIN to point-of-load power supply with front-end circuit protection reference design


Design files


This automotive point-of-load power supply reference design features complete front-end protection in a small overall solution size. The system can clamp fast high-voltage electrical transients and maintain operation through these events. It can also properly respond to a reverse battery polarity event and shut down appropriately. This three-output design employs sequencing of two buck regulators to ensure proper power-on and power-down timing, and features an input pi filter to reduce conducted EMI. The design accepts an input voltage of 5 V to 36 V and provides outputs of 3.3 V, 1.2 V, and 1.8 V. This supply is capable of supplying 2 A on the 1.8 V and 1.2-V outputs, while the 3.3-V output simultaneously supplies 3.55 A.

  • Complete wide Vin front-end automotive power supply
  • Off-battery operation with reverse battery protection 
  • Positive and negative transient voltage protection
  • Auto-sequencing of all three power rails
  • Reduced EMI with included pi filter
Output voltage options PMP15023.1 PMP15023.2 PMP15023.3
Vin (Min) (V) 5 5 5
Vin (Max) (V) 36 36 36
Vout (Nom) (V) 3.3 1.2 1.8
Iout (Max) (A) 3.55 2 2
Output Power (W) 11.715 2.4 3.6
Isolated/Non-Isolated Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC DC
Topology Buck- Integrated Switch Buck- Integrated Switch Buck- Integrated Switch
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDT002A.PDF (2905 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement


Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Technical documentation

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Type Title Date
* Test report Automotive Wide-VIN to Point-of-Load Power Supply Reference Design (Rev. A) Mar. 26, 2020

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