TPS54561QDPRRQ1

1 Features

• Qualified for Automotive Applications

• AEC-Q100 Qualified With the Following Results:

  – Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range

  – Device HBM ESD Classification H1C

  – Device CDM ESD Classification C5

• High Efficiency at Light Loads With PulseSkipping Eco-mode™ Control

• 87-mΩ High-Side MOSFET

• 152-µA Operating Quiescent Current and 2-µA Shutdown Current

• 100-kHz to 2.5-MHz Switching Frequency

• Synchronizes to External Clock

• Low-Dropout Operation at Light Loads With Integrated BOOT Recharge FET

• Adjustable UVLO Voltage and Hysteresis

• Power-Good Output Monitor for Undervoltage and Overvoltage

• Adjustable Soft-Start and Sequencing

• 0.8-V 1% Internal Voltage Reference

• 10-Pin SON With Thermal Pad Package

• –40°C to 150°C TJ Operating Range

• Supported by WEBENCH® Software Tool

2  Applications

• Vehicle Accessories: GPS (see SLVA412), Entertainment

• USB Dedicated Charging Ports and Battery Chargers (see SLVA464) • 12-V and 24-V Automotive Power Systems

3 Description


The TPS54561-Q1 device is a 60-V,5-A, step-down regulator with an integrated high-side MOSFET. The device survives load dump pulses up to 65 V per ISO 7637. Current-mode control provides simple extemnal compensation and flexible component selection. A low-ripple pulse-skip mode and 152-μA supply current enables high efficiency at light loads. Pulling the enable pin low reduces shutdown supply current to 2 μA.
Underyoltage lockout has an intemnal 4.3-V setting. Use of an external resistor divider at the EN pin can increase the setting. The soft-start pin controls the output-voltage start-up ramp and also configures sequencing or tracking. An open-drain power-good signal indicates the output is within 93% to 106% of its nominal voltage.
A wide adjustable switching-frequency range allows optimization for either efficiency or external component size. Cycle-by-cycle current limit, frequency foldback, and thermal shutdown protect the device during an overload condition.
The TPS54561-Q1 is available in a 10-pin,4-mm×4-mm SON package.

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