TPS54341 Series

4.5 to 42V Input 3.5A Step-Down DC-DC Converter With Soft-Start and Eco-mode™

Catalog

4.5 to 42V Input 3.5A Step-Down DC-DC Converter With Soft-Start and Eco-mode™

Part	Voltage - Output (Min/Fixed)	Function	Operating Temperature [Max]	Operating Temperature [Min]	Number of Outputs	Synchronous Rectifier	Frequency - Switching [Max]	Frequency - Switching [Min]	Output Type	Supplier Device Package	Package / Case	Current - Output	Output Configuration	Voltage - Input (Min) [Min]	Voltage - Output (Max) [Max]	Topology	Voltage - Input (Max) [Max]	Mounting Type
Texas Instruments TPS54341DPRR	0.8 V	Step-Down	85 °C	-40 °C	1		2.5 MHz	100 kHz	Adjustable	10-WSON (4x4)	10-WDFN Exposed Pad	3.5 A	Positive	4.5 V	41 V	Buck Split Rail	42 V	Surface Mount

Catalog

4.5 to 42V Input 3.5A Step-Down DC-DC Converter With Soft-Start and Eco-mode™

Key Features

• High Efficiency at Light Loads with Pulse Skipping Eco-mode™87-mΩ High-Side MOSFET152-µA Operating Quiescent Current and 2-µA Shutdown Current100-kHz to 2.5-MHz Adjustable Switching FrequencySynchronizes to External ClockLow Dropout at Light Loads with Integrated BOOT Recharge FETAdjustable UVLO Voltage and HysteresisUV and OV Power-Good OutputAdjustable Soft-Start and Sequencing0.8-V 1% Internal Voltage Reference10-Pin WSON with Thermal Pad Package–40°C to 150°C TJOperating RangeSupported by WEBENCH®Software ToolHigh Efficiency at Light Loads with Pulse Skipping Eco-mode™87-mΩ High-Side MOSFET152-µA Operating Quiescent Current and 2-µA Shutdown Current100-kHz to 2.5-MHz Adjustable Switching FrequencySynchronizes to External ClockLow Dropout at Light Loads with Integrated BOOT Recharge FETAdjustable UVLO Voltage and HysteresisUV and OV Power-Good OutputAdjustable Soft-Start and Sequencing0.8-V 1% Internal Voltage Reference10-Pin WSON with Thermal Pad Package–40°C to 150°C TJOperating RangeSupported by WEBENCH®Software Tool

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. 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.