TPS40210DGQR Integrated Circuits (ICs)

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Application Field and Working Principle of TPS40210DGQR

The TPS40210DGQR is a DC/DC switching controller that is part of the voltage regulators pmic and is specifically designed for adjustable stepdown applications. It enables industry standard regulator topologies such as Buck and Buck-Boost, synchronous Buck-Boost, SEPIC and Flyback with 12V or lower voltage output. This switching controller offers multiple additional features such as output short-circuit protection, programmable spread-spectrum operation, and a precise voltage feedback. This device operates in a single supply voltage range of 4.5 to 18V and can be programmed to drive an N-channel power MOSFETs with a peak current limit up to 8A.

Features

• High-efficiency, adjustable, step-down synchronous DC/DC controller
• Operating voltage range of 4.5V to 18V for single supply applications
• Wide adjustable range from 0.6V to 5.5V for VOUT
• Precise voltage feedback accuracy of ±2.5%
• Spread spectrum modulation for EMI reduction
• Programmable peak current limit up to 8A
• 12A low-side power MOSFET gate drive
• VIN and VOUT disconnect feature
• Pulse-skipping mode for low-power operation
• Open-drain fault flag for accurate fault detection

Working Principle

The TPS40210DGQR is a versatile and highly integrated DC/DC controller designed to deliver high efficiency along with additional features. It enables fast transient response and wide dynamic range output voltage regulation with a single external resistor. The device continuously monitors the output voltage against the programmed reference voltage and regulates it by controlling the duty cycle of the switching cycle. The internal synchronous rectifier structure eliminates the need for the external Schottky diode thus reducing power dissipation.

The TPS40210DGQR is equipped with an adjustable peak current limit circuitry that allows the user to set the maximum current limit safely by setting the external resistor. This current limit circuit is also used to control active current sharing among multiple output rails. The device also supports pulse-skipping mode for EMI reduction and a low-power operation. In addition, the open-drain fault flag pin allows the user to detect various fault conditions.

The device is equipped with internal circuitry for rds(on) sensing of both the high and low side MOSFETs, thus providing accurate current sensing with no external resistors required. It also provides internal oscillator for controlled, accurate switching cycle and provides an option for external synchronization. The built-in synchronous rectifier provides efficient operation even in applications with high output voltages. This feature saves the initial bill of material cost and the total solution size of the system.

Conclusion

The TPS40210DGQR is a versatile DC/DC switching controller that enables industry standard regulator topologies such as Buck, Buck-Boost, SEPIC and Flyback with adjustable step-down applications. It operates in a single supply voltage range of 4.5V to 18V with a peak current limit up to 8A and enables fast transient response and wide dynamic range output voltage regulation. Additionally, features like output short-circuit protection and a precise voltage feedback accuracy of ±2.5% make this device the ideal choice for adjustable step-down applications.

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