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DA9131-A

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Automotive-Grade, High-Efficiency, Dual-Channel (5A per Channel), Step-Down DC/DC Converter (Buck)

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DA9131-A Datasheet

Overview

The DA9131-A is a high-efficiency, automotive-grade, dual-channel, step-down DC/DC (buck) converter with integrated switching FETs delivering 5A per channel. The device can operate at efficiency levels above 90%, reducing the thermal design challenges of powering high current rails in a wide range of automotive systems such as navigation systems, infotainment, telematics, Advanced Driver Assistance Systems (ADAS), or any automotive high-performance processing system requiring efficient, high current, power delivery.

The DA9131-A device has an input voltage range of 2.5V to 5.5V and an output voltage range of 0.3V to 1.9V, making it suitable for a wide variety of low voltage systems. The DA9131-A only requires two small 0.10µH inductors, delivering a highly optimized BOM and footprint. Output voltages above 1.9V are supported with an external resistor divider.

The DA9131-A device is part of the Renesas family of flexible, scalable, reliable automotive systems and sub-PMICs, enabling an "Exact-Fit" power solution. It is available in a 3.3mm x 4.8mm 24-pin FC-QFN wettable flank package. An Industrial/commercial grade version is also available (DA9131).

Benefits

  • High-efficiency buck converters deliver outstanding thermal performance.
  • Fully integrated switching FETs means no external FETs or Schottky diodes are required.
  • Remote sensing guarantees the highest accuracy and supports multiple PCB routing scenarios without loss of performance.
  • Fully programmable soft-start limits the inrush current from the input to give a slope-controlled output voltage.
  • Dynamic Voltage Control (DVC) enables adaptive adjustment of the device output voltage depending on the load. This increases efficiency when the downstream circuitry enters low power or idle mode, resulting in power savings.
  • Configurable GPIOs support a range of features including I2C, DVC and Power-Good indicator.
  • Optimized BOM cost and footprint: Each output requires a very small inductor and capacitor delivering parts and cost savings.
  • Cycle-by-cycle current limiting for superior overcurrent protection.
DA9131-A Block Diagram
DA9131-A Block Diagram
  • 2.5V to 5.5V input voltage
  • 0.3V to 1.9V output voltage
  • 4MHz nominal switching frequency
  • ±1% accuracy (static)
  • ±5% accuracy (dynamic)
  • I2C-compatible interface (FM+)
  • Programmable GPIOs
  • Programmable soft-start
  • Voltage, current and temperature supervision
  • Key safety features
    • Output undervoltage and overvoltage protection
    • Input undervoltage protection
    • 2-step over-temperature protection
  • -40 °C to +105 °C ambient temperature range
  • AEC-Q100 Grade 2 qualified for automotive applications
  • Vehicle infotainment systems
  • ADAS
  • Automotive navigation
  • Automotive center console
  • Automotive cluster
  • Telematics
  • SoC/FPGA based, high-performance, automotive Electronic Control Unit (ECU) requiring efficient, high current, power delivery

Documentation

Featured Documentation
Type Title Date
Datasheet
DA9131-A Datasheet
PDF 833 KB
Application Note
AN-PM-167 DA913x PCB Layout Guidelines
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Quick Start Guide
UM-PM-63 DA913x EVB Quick Start
PDF 118 KB
Schematic
DA913x-30-A1 Schematic
PDF 126 KB
Guide
UM-PM-64 DA913x EVB User Guide
PDF 480 KB
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Design & Development

Software Downloads
Type Title Date
Software & Tools - Other
DA9130-A ,DA9131-A, DA9121, DA9217, DA9122, DA9220 Linux Driver
Log in to Download ZIP 438 KB
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ECAD Models

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