1 Features
1• High Efficiency at Light Loads with Pulse Skipping
Eco-mode™
• 87-mΩ High-Side MOSFET
• 152-μA Operating Quiescent Current and
2-μA Shutdown Current
• 100-kHz to 2.5-MHz Adjustable Switching
Frequency
• Synchronizes to External Clock
• Low Dropout at Light Loads with Integrated BOOT
Recharge FET
• Adjustable UVLO Voltage and Hysteresis
• UV and OV Power-Good Output
• Adjustable Soft-Start and Sequencing
• 0.8-V 1% Internal Voltage Reference
• 10-Pin WSON with Thermal Pad Package
• –40°C to 150°C TJ Operating Range
• Create a Custom Design using the TPS54541 with
the WEBENCH® Power Designer

2 Applications
• Industrial Automation and Motor Control
• Vehicle Accessories: GPS (see SLVA412),
Entertainment
• USB-Dedicated Charging Ports and Battery
Chargers (see SLVA464)
• 12-V and 24-V Industrial, Automotive and
Communications Power Systems

3 Description
The TPS54541 device is a 42-V 5-A step-down
regulator with an integrated high-side MOSFET. The
device survives load dump pulses up to 45 V per ISO
7637. Current mode control provides simple external
compensation and flexible component selection. A
low-ripple pulse-skip mode reduces the no-load
supply current to 152 μA. When the enable pin is
pulled low, the shutdown supply current is reduced to
2 μA .
Undervoltage lockout is internally set at 4.3 V but can
increase using an external resistor divider at the
enable pin. The output voltage startup ramp is
controlled by the soft-start pin that can also be
configured for sequencing and tracking. An opendrain
power-good signal indicates the output is within
93% to 106% of the nominal voltage.
A wide adjustable switching-frequency range allows
for optimization of either efficiency or external
component size. Cycle-by-cycle current limit,
frequency foldback, and thermal shutdown protect
internal and external components during an overload
condition.
The TPS54541 device is available in a 10-pin 4-mm ×
4-mm WSON package.