The LM25149-Q1EVM-2100 high-density EVM is designed to use a regulated or non-regulated high-voltage input rail ranging from 5.5 V to 36 V to produce a tightly-regulated output voltage of 5 V at load currents up to 8 A. This wide V_IN range DC/DC solution offers outsized voltage rating and operating margin to withstand supply rail voltage transients.

The free-running switching frequency is 2.1 MHz and is synchronizable to an external clock signal at a higher or lower frequency. The power-train passive components selected for this EVM, including buck inductors and ceramic input and output capacitors, are automotive AEC-Q200 rated and are available from multiple component vendors.

• High-current automotive electronic systems
• ADAS and body electronics
• Infotainment systems and instrument clusters
• Automotive HEV/EV powertrain systems

• Wide input voltage operating range of 5.5 V to 36 V

• 1% accurate fixed 3.3 V, 5 V, or adjustable output down to 0.8 V

• Switching frequency of 2.1 MHz externally synchronizable up or down by 20%
• Full-load efficiency of 92.8% at V_IN = 12 V
• 12-µA controller standby current at V_IN = 12 V
• Optimized for ultra-low EMI
  • Dual-Random Spread Spectrum and Active EMI filtering
  • Meets CISPR 25 and UNECE Reg 10 EMI standards
• Peak current-mode control architecture provides fast line and load transient response
  • Integrated slope compensation adaptive with switching frequency
  • Forced PWM (FPWM) or Pulsed-Frequency Modulation (PFM) operation
  • Optional internal or external loop compensation
• Integrated high-side and low-side power MOSFET gate drivers
  • 2.2-A and 3.2-A sink and source gate drive current capability
  • 13-ns adaptive dead-time control reduces power dissipation and MOSFET temperature rise
• Overcurrent protection (OCP) with hiccup mode for sustained overload conditions
• SYNCOUT signal 180° out-of-phase with internal clock
• Power Good signal with 100-kΩ pullup resistor to VCC
• Internal 3-ms soft start
• Fully assembled, tested, and proven PCB layout with 70-mm × 40-mm total footprint