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.