3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode - TPS54040


3.5V to 42V Input, 0.5A Step-Down Converter with Eco-Mode

Recommended alternative parts

  • TPS54040A  -  “A” version offers tighter Enable threshold and enhanced (2KV) HBM ESD – Recommended for new Designs

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The TPS54040 device is a 42V, 0.5A, step down regulator with an integrated high side MOSFET. Current mode control provides simple external compensation and flexible component selection. A low ripple pulse skip mode reduces the no load, regulated output supply current to 116µA. Using the enable pin, shutdown supply current is reduced to 1.3µA, when the enable pin is low.

Under voltage lockout is internally set at 2.5V, but can be increased using the enable pin. The output voltage startup ramp is controlled by the slow start pin that can also be configured for sequencing/tracking. An open drain power good signal indicates the output is within 93% to 107% of its nominal voltage.

A wide switching frequency range allows efficiency and external component size to be optimized. Frequency fold back and thermal shutdown protects the part during an overload condition.

The TPS54040 is available in 10 pin thermally enhanced MSOP PowerPAD™ package.


  • 3.5V to 42V Input Voltage Range
  • 200-mΩ High-Side MOSFET
  • High Efficiency at Light Loads with a
    Pulse Skipping Eco-mode
  • 116µA Operating Quiescent Current
  • 1.3µ Shutdown Current
  • 100kHz to 2.5MHz Switching Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start/Sequencing
  • UV and OV Power Good Output
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8-V Internal Voltage Reference
  • MSOP10 Package With PowerPAD
  • Supported by SwitcherPro Software Tool

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Other qualified versions of TPS54040

Version Part Number Definition
Automotive TPS54040-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
    Min   Max   Range  
  Vin V    3.50 – 42.00V  
  Vout V    0.80 – 39.00V  
  Iout A    ≤ 0.5A  
  Ambient Temp °C    -40 – 150°C  
Footprint BOM Cost Efficiency
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