Automotive Dual Buck Regulator and Controller with Voltage Monitors and Watchdog Timer

FS5600

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The FS56 System Basis Chip (SBC) for Automotive features a battery connected DC-DC buck controller with external FET and a battery connected DC-DC buck controller with internal FET.

In addition, it offers functional safety features such as independent voltage monitors, windowed watchdog timer, I/O monitoring via ERRMON and FCCU and built-in-self test. The FS56 is offered in QM, ASIL B and Enhanced ASIL B versions.

The FS56 offers highly configurable General Purpose Input/Outputs for seamless operation with PF PMICs as PF8x, PF7x and PF5x families.

The FS56 presents an optimized architecture for automotive with low-power modes and EMC minimizing as spread spectrum, frequency tuning and synchronization.

Block Diagram

FS56 Block Diagram

FS56 Block Diagram
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Features

Power Management

  • 2 x High-Voltage Buck Converters:
  • HV Buck Controller - External FETs – up to 15A load
  • 3 A HV Buck Regulator – Internal FETs - η = 93% @ 3A
  • +/- 2% Output Accuracy
  • 250 kHz to 3 MHz switching frequency
  • High-Efficiency PFM Mode (700 uW quiescent power)

System Features

  • Dual independents DC/DC Buck
  • GPIOs for seamless operation with PF PMICs
  • Rated from -40 °C to 150 °C TJ

Safety Features (ASIL B)

  • ASIL B compliant
  • 2 internal and 4 external voltage monitors
  • Windowed Watchdog Timer
  • PGOOD and FS0B outputs
  • ABIST and LBIST
  • SoC HW monitoring pins (FCCU and ERRMON)

Programmability

  • Supplies, sequencing and specific functions can be programmed by One Time programmable (OTP) memory
  • Standard Predefined OTP supporting popular MCU can be found in data sheet under “ordering information” chapter
  • Custom OTP can be provided for production. Please contact your NXP sales channel (NXP or your distributor)
  • Custom OTP can be created using the NXP GUI software tool

Product Longevity Program

  • This product is included in the NXP Product Longevity program ensuring a stable supply of products for your embedded designs. Automotive target market derivatives are included in the 15-year program and Industrial target market derivatives are included in the 10-year program

Comparison Table

Device options for Automotive

Part Number Target Market Safety Grade OTP ID
MFS5600AMMA0ES Automotive QM A0-Non-programmed
MFS5600AMBA0ES Automotive ASIL B A0-Non-programmed
MFS5600AMEA0ES Automotive Enhanced ASIL B A0-Non-programmed
MFS5600AMMA7ES Automotive QM A7 – SW1 = 5.0V, SW2 = 3.3V
MFS5600A7ES-OTP-Report
MFS5600AMMA8ES Automotive QM A8 – SW1 = 3.3V, SW2 = 5.0V
MFS5600A8ES-OTP-Report

Device options for Industrial

Part Number Target Market Safety Grade OTP ID
MFS5600AVNA0EP Industrial QM A0-Non-programmed

BYLink System Power Platform

BYLink System Power Platform

This platform facilitates the design of safe power management systems thanks to a portfolio of configurable and linkable devices. It simplifies complex power supply subsystems into a single smart solution.
Learn more about this platform

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