TPS54317RHFR Integrated Circuits (ICs)

Voltage - Output (Min/Fixed):	0.891V
Base Part Number:	TPS54317
Supplier Device Package:	24-VQFN (5x4)
Package / Case:	24-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	350kHz, 550kHz
Current - Output:	3A
Voltage - Output (Max):	3.3V
Series:	SWIFT™
Voltage - Input (Max):	6V
Voltage - Input (Min):	3V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS54317RHFR Application Field and Working PrincipleThe TPS54317RHFR is a DC-DC switching regulator feature set specifically designed for high-current, extended-temperature applications. It is a 3-A monolithic step-down switching regulator that can implement a wide variety of designs, including synchronous buck, with different voltage ranges and has a maximum sustained output current of up to 3A.

Overview

The TPS54317RHFR is an advanced, high-current, fine-tuned voltage regulator set from Texas Instruments. It significantly improves power conversion and regulation efficiency in applications with output currents up to 3A, especially in automotive, aerospace, and other environments that require extended temperature range of -40°C to 150°C. The TPS54317RHFR\'s monolithic step-down switching regulator can be configured for both synchronous buck and non-synchronous buck applications. Its design is flexible and configurable with different voltage ranges, enabling designers to meet their unique system needs with up to 3A of output current.

Features of TPS54317RHFR

The TPS54317RHFR contains a wide array of features that enable optimized system designs. These features include a 3-A high peak output current, an integrated high-side MOSFET, output voltage range of 0.8V to 5.5V, programmable switching frequency up to 1MHz, multiple current protection modes, and built-in frequency dithering to reduce system EMI. Moreover, the TPS54317RHFR incorporates a system-level loop compensation network, eliminating the need for external inductors, capacitors, and other components for optimal performance and cost savings.

Applications

TPS54317RHFR can easily be applied in multiple high current applications, such as automotive and industrial systems, datacenters, telecom systems, server applications and more. For example, it can be used in automotive applications such as LED lighting, alternator systems, and air conditioning systems. It can be used in industrial systems like HVAC, water pumps, and fans. It can also be used in server applications such as CPU and memory voltage regulation.

Working Principle

The TPS54317RHFR operates by transforming the incoming electrical energy into a different type of energy namely the stored energy of an inductor. This stored energy takes the form of a magnetic, field. When the power switch (MOSFET) is “on,” the active current passes through the inductor and creates a magnetic field inside the inductor core, and the current keeps increasing until the power switch is turned “off”. Current stops flowing and the stored energy of the magnetic field is released and flows back into the circuit in the reverse direction, which is the output of the TPS54317RHFR device. A diode connected parallel to the inductor helps keep the current from flowing back to the input via the power switch.The TPS54317RHFR control circuit also helps regulate the output voltage of the device. The control circuit measures the output voltage and adjusts the duty cycle of the power switch accordingly. A lower duty cycle results in a lower output voltage and vice versa.

Conclusion

The TPS54317RHFR is a high-current, fine-tuned voltage regulator set from Texas Instruments. Its features enable optimized system designs while its wide array of applications provide versatile usage. Its working principle of turning energy into a magnetic field and regulating its output voltage makes the TPS54317RHFR an efficient device for high current power conversion applications.

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