TPS51317RGBT Integrated Circuits (ICs)

Series:	D-CAP+™
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Output Type:	Adjustable
Number of Outputs:	1
Voltage - Input (Min):	4.5V
Voltage - Input (Max):	6.5V
Voltage - Output (Min/Fixed):	0.6V
Voltage - Output (Max):	2V
Current - Output:	6A
Frequency - Switching:	800kHz, 1MHz, 1.2MHz, 1.5MHz
Synchronous Rectifier:	Yes
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	20-VFQFN Exposed Pad
Supplier Device Package:	20-VQFN (3.5x4)
Base Part Number:	TPS51317

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TPS51317RGBT Application Field and Working Principle

The TPS51317RGBT is a high-efficiency, multi-phase DC/DC Buck switching regulator from Texas Instruments. It is a time-switched, digital-controlled PWM regulator, operating over an input voltage range of 0.6V to 1.23V. This device is suitable for power management in automotive systems, as well as portable electronics applications.

Application Field

The TPS51317RGBT is a cost-effective, high-performance solution for application requirements where DC/DC conversion efficiencies must be maintained while maintaining a wide operating voltage range. This is particularly useful in automotive systems and portable electronics applications, which require power management solutions to efficiently regulate the power and performance levels of these components.In automotive systems, the TPS51317RGBT is designed to satisfy the most demanding requirements for a wide range of automotive systems, such as body electronics, powertrain, and sensors. This device can also be used in a wide range of applications such as cell phones, laptops, automotive displays, and automotive lighting systems.

Working Principle

The TPS51317RGBT utilizes a time-switched, digital-controlled PWM (pulse-width-modulated) regulator to achieve energy efficiency with a wide input voltage range. The device automatically selects Phases A, B and C to regulate the output voltage. The designed architecture allows the output voltage to remain consistent, no matter how much current is supplied.The TPS51317RGBT utilizes a current mode switching topology which employs an internal sense resistor to regulate the output voltage. This device uses an internal voltage loop with a high-gain error amplifier that regulates the output voltage. The error amplifier compares the output voltage and adjusts the duty cycle of the switch accordingly.To increase the temperature capability of the device, PWM has been implemented, with automatic phased mode transition for low ripple operation. In addition, the TPS51317RGBT has an in-line sense resistor which automatically adjusts the phase transitions to maintain the lowest possible output voltage ripple.The TPS51317RGBT has a built-in soft start, which helps to reduce inrush current during start-up and eliminate output voltage overshoot. This device also includes a programmable transition time between phase transition and a programmable phase transition frequency.

Conclusion

The TPS51317RGBT is a multi-phase DC/DC buck switching regulator designed to meet the most demanding requirements for a wide range of automotive systems and portable electronics applications. This device utilizes an internal sense resistor to regulate the output voltage, and the built-in soft start helps to reduce inrush current during start-up and eliminate output voltage overshoot. With a designed architecture that allows the output voltage to remain consistent, no matter how much current is supplied, the TPS51317RGBT can help design engineers meet even the most demanding application requirements.

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