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
• Supported by WEBENCH® Software Tool

2 Applications
• Industrial Automation and Motor Control
• Vehicle Accessories: GPS and Entertainment (see
Creating GSM/GRPS Power Supply from
TPS54260, SLVA412)
• USB-Dedicated Charging Ports and Battery
Chargers (see Creating a Universal Car Charger
for USB devices From the TPS54240 and
TPS2511, SLVA464)
• 12-V and 24-V Industrial, Automotive and
Communications Power Systems

3 Description
The TPS54341 device is a 42-V, 3.5-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. Shutdown supply current is
reduced to 2 μA when the enable pin is pulled low.
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/tracking. An open-drain
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 protects
internal and external components during an overload
condition.
The TPS54341 device is available in a 10-pin 4-mm ×
4-mm WSON package.