Texas Instruments TPS54541

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. 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 and 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 TPS54541 device is available in a 10-pin 4-mm × 4-mm SON package.

Features

• 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 SON with Thermal Pad Package
• –40°C to 150°C TJ Operating Range
• Supported by WEBENCH Software Tool

Typical applications

• 12-V and 24-V Industrial, Automotive and
• Industrial Automation and Motor Control
• USB-Dedicated Charging Ports and Battery
• Vehicle Accessories: GPS (see SLVA412),

More information

• Datasheet
• IC product information