System Level Power Reference Design for 20-W ADAS system with Automotive Protections
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Key Document


PMP10750 is a System optimized (CISPR 25 Class 5) 20W design for upstream converter used in ADAS system with automotive protection.

The design has various protections such as Load dump through TVS (ISO pulse testing), Reverse Voltage (Innovative Smart diode with very low Iq), Battery Disconnect Switch with OVP protection (PFET) and is EMI optimized to meet Conductive EMI limits of CISPR25 Class5.
Input voltage range is between 4.5V to 30V with OVP at 20V and hence will operate in wide input voltage conditions.

LM74610 is used for Battery reverse protection which utilizes a charge pump to drive an N-channel FET to provide a resistive path for the bypass current to flow.  LM53603Q1 is used as front end DC/DC Buck converter which is 2.2MHz switching, Synchronous rectified Wide Vin Buck Converter which can take transient up to 42V.

  • Designed for wide Vin and Start Stop conditions 
  • In compliance with the ISO pulse test / CISPR 25 Class 5 conducted emissions standard, passing both AM & FM radio band tests
  • All devices Switching frequency at 2.1MHz (AM Band Avoidance)
  • Reverse Protection through Smart diode
  • Series Fault protection FET with OVP
  • Power up and Power Down sequencing through integrated sequencer

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(Output Voltage 1)
Vin (Min) (V)4.8
Vin (Max) (V)30
Vout (Nom) (V)3.3
Iout (Max) (A)3
Output Power (W)9.9
Input TypeDC
TopologyBuck- Synchronous

TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM53603-Q1  3.5 to 36Vin, 3 Ampere Synchronous DC-DC Converter for Automotive Applications  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
LM74610-Q1  0.48-V to 42-V, zero IQ automotive ideal diode controller  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TLVH431A  1% low-voltage wide-operating current adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM53603-Q1 Download Download
LM74610-Q1 Download Download
TLVH431A Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1338 19 Oct 2015
Design files (3)
Title Type Size (KB) Date
ZIP 375 19 Oct 2015
PDF 104 19 Oct 2015
PDF 495 19 Oct 2015

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