TPS54340QDDARQ1: Pinout, Switching Regulator, Step-down, N-channel

The TPS54340QDDARQ1 is a step-down (buck) regulator with an integrated high-side N-channel MOSFET that operates at 42 V and 3.5 A. Constant-frequency current-mode control can be used in the device, which decreases output capacitance and simplifies external frequency adjustment. When selecting output filter components, the wide switching-frequency range of 100 kHz to 2500 kHz provides for either efficiency or size optimization. A resistor to earth attached to the RT/CLK pin is used to modify the switching frequency. The power switch is synchronized to a falling edge of an external clock signal by an internal phaselocked loop (PLL) coupled to the RT/CLK pin.

The default input start-up voltage of the TPS54340QDDARQ1 device is around 4.3 V. By two external resistors, the EN pin controls the input voltage undervoltage lockout (UVLO) threshold.When the EN pin is floating, an internal pull-up current source allows operation. When there is no load, the operating current is 146 A. (not switching). The supply current is 1A when the gadget is turned off.

Footprint

3D Model

• Qualified for Automotive Applications

• AEC-Q100 Qualified With the Following Results:

– Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range

– Device HBM ESD Classification Level H1C

– Device CDM ESD Classification Level C3B

• High Efficiency at Light Loads With Pulse Skipping Eco-mode™

• 92-mΩ High-Side MOSFET

• 146-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

• 0.8 V 1% Internal Voltage Reference

• –40°C to 150°C TJ Operating Range

• Supported by WEBENCH® Software Tool

NA TPS54340QDDARQ1 technical specifications, attributes, parameters and parts with similar specifications to NA TPS54340QDDARQ1.

• Vehicle Accessories: GPS (See SLVA412), Entertainment, ADAS, eCall

• USB Dedicated Charging Ports and Battery Chargers (See SLVA464)

• Industrial Automation and Motor Control

• 12-V and 24-V Industrial, Automotive, and Communications Power Systems

TPS54340QDDARQ1 Typical Application

Texas Instruments Incorporated (TI) is an American technology company based in Dallas, Texas, that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. It is one of the top 10 semiconductor companies worldwide based on sales volume. The company's focus is on developing analog chips and embedded processors, which account for more than 80% of its revenue. TI also produces TI digital light processing technology and education technology products including calculators, micro-controllers, and multi-core processors. The company boasts 45,000 patents around the globe as of 2016.