Voltage - Output (Min/Fixed):	0.76V
Base Part Number:	TPS54226
Supplier Device Package:	16-QFN (3x3)
Package / Case:	16-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	700kHz
Current - Output:	2A
Voltage - Output (Max):	5.5V
Series:	SWIFT™, D-CAP2™, Eco-Mode™
Voltage - Input (Max):	18V
Voltage - Input (Min):	2V
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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TPS54226RGTR Application Field and Working Principle

The TPS54226RGTR is a DC/DC switching regulator from the Texas Instruments Power Management Integrated Circuits (PMIC) Voltage Regulators family. This regulator is designed for high current and high voltage applications such as point of load (POL) DC/DC conversion, and offers several features for ease of use. It is a step-down switchmode regulator with a maximum input voltage of up to 36 V and a maximum output current of up to 8A, and can also be adjusted to usage conditions using the on-chip settings. This datasheet is intended to provide an overview of the features, specifications, and applications of the TPS54226RGTR.

Features

The TPS54226RGTR is a high power, high voltage, adjustable DC/DC switching regulator with a wide range of features. It is based on the LM37100 control IC and includes both programmable high-side and low-side transistors. These two transistors provide efficient and robust control and enable the regulator to achieve high current output with minimized losses.The circuit also includes an adjustable OUT voltage, which can be configured over a wide range of between 0.6V and 36V. The switching frequency is also adjustable and can be configured to a range between 200 kHz and 800 kHz with a minimum of 20 mV of overshoot at start-up. In terms of protection features, the TPS54226RGTR includes both over current and over voltage protection.

Specifications and Applications

The TPS54226RGTR DC/DC regulator is capable of delivering up to 8A at up to 36V input voltage. It has an adjustable output range of 0.6V to 36V and a switching frequency range of 200 kHz to 800 kHz, enabling it to be used in a variety of portable and embedded applications.The TPS54226RGTR supports applications such as PC motherboard, graphics card, and telecom systems. It is suitable for voltage seeding and residual voltage circuits, PCI-E, PoE, and low-power point-of-load polarity reversal applications. The circuit also features adjustable loop compensation and a wide Vref range of 3.2V to 24V, ideal for non-traditional input voltages.

Working Principle

The TPS54226RGTR is a step-down DC/DC regulator consisting of a high-side and a low-side MOSFET, as well as a current sense resistor. The control IC, the LM37100, provides the feedback and current limiting to ensure the output voltage aligns to the set voltage.At startup, the low side MOSFET is turned on and the high side is turned off. This allows the current to flow through the inductor and to the load, allowing the output voltage to drop. The voltage at the load is sensed and provided as an input to the control IC.As the sensed voltage approaches the output set voltage, the duty cycle of the high side MOSFET is increased, providing more current to the load and increasing the output voltage to the set voltage.Once the set voltage is reached, the duty cycle of the high side MOSFET is kept constant and the output voltage is regulated. The control IC will also provide current limiting, ensuring that the output current does not exceed the maximum allowable current.

Conclusion

The TPS54226RGTR is a high power, high voltage adjustable DC/DC switching regulator from the Texas Instruments Power Management Integrated Circuits (PMIC) Voltage Regulators family. It is capable of delivering up to 8A at up to 36V input voltage, and has an adjustable output range of 0.6V to 36V and a switching frequency range of 200 kHz to 800 kHz. With adjustable loop compensation, a wide Vref range of 3.2V to 24V, and over current and over voltage protection, the TPS54226RGTR is suitable for a variety of portable and embedded applications.

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