The TPS57140-Q1 device is a 42-V, 1.5-A 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 116 μA. Using the enable pin reduces the shutdown supply current to 1.5 µA.

Undervoltage lockout is internally set at 2.5 V, but can be increased using the enable pin. The slow-start pin, which is also configurable for sequencing or tracking, controls the output voltage start-up ramp. An open-drain power-good signal indicates the output is within 92% to 109% of its nominal voltage.

A wide switching-frequency range allows optimizaton of efficiency and external component size. Frequency foldback and thermal shutdown protect the part during an overload condition.

The TPS57140-Q1 is available in a 10-pin thermally enhanced MSOP PowerPAD package (DGQ) and a 10-pin SON package (DRC).

• Qualified for Automotive Applications
• 3.5-V to 42-V Input Voltage Range
• 200-mΩ High-Side MOSFET
• High Efficiency at Light Loads With Pulse-Skipping Eco-mode Control Scheme
• 116-µA Operating Quiescent Current
• 1.5-µA Shutdown Current
• 100-kHz to 2.5-MHz Switching Frequency
• Synchronizes to External Clock
• Adjustable Slow Start and Sequencing
• Undervoltage and Overvoltage Power-Good Output
• Adjustable Undervoltage Lockout Voltage and Hysteresis
• 0.8-V Internal Voltage Reference
• Supported by SwitcherPro Software Tool (http://focus.ti.com/docs/toolsw/folders/print/switcherpro.html)
• For SWIFT Documentation, See the TI Web site at http://www.ti.com/swift
• APPLICATIONS
  • 12-V and 24-V Industrial and Commercial Low-Power Systems
  • Aftermarket Automotive Accessories: Video, GPS, Entertainment