TPS62172DSGR

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TPS62172DSGR is a precission voltage regulator designed for use in low power and space constrained applications. It is a synchronous DC/DC switching regulator that offers high efficiency and low quiescent current. The TPS62172DSGR is capable of providing up to 2A output current in a low profile WDFN-10 or SOT-23-5 package. The device operates with an input voltage range of 1.8V to 5.5V and provides a selectable fixed output voltage with ±2% of nominal accuracy.

The TPS62172DSGR integrates two low Rds(on) integrated MOSFETs, a voltage detection circuit, a voltage reference and other necessary circuitry to implement a step down regulator. It uses a voltage input, RFIN/VRIN/VIN, to regulate the output voltage. The operation also depends on two external resistors, one to provide setting for the feedback voltage and another for the oscillator frequency. The integrated MOSFETs are connected in a buck-boost configuration so that the device can step down and step up the input voltage providing a high efficiency over a wide input voltage range.

The TPS62172DSGR strength lies in its light output load, ability to accept wide input voltage range and ability to be used in both step-up and step-down voltage regulation. Its features suit the device to applications such as mediapad, USB power source and low power IoT, as well as many other applications that require high efficiency and low quiescent current while optimizing board space, especially when restricted to a 10-pin or 5-pin package.

The circuit of TPS62172DSGR includes an input voltage outside the switching converter, an error amplifier and an oscillator control circuit. When the input voltage does not change, theswitch observes the error amp and the output becomes stable. When the output voltage changes, the error amp will regulate the output so as to maintain its preset accuracy. The oscillator determines the switching frequency, for example 100KHz for the TPS62172DSGR, and the transformer turns ratio determines the outvoltage. With the combination of inductors, oscillator and virtual ground, the TPS62172DSGR can be powered and regulated continuously.

Overall, the TPS62172DSGR DC/DC switching regulator is a robust and versatile solution for applications that require regulated output voltage with efficiency and low quiescent current. With its wide input voltage range and output voltage accuracy, it can be used in a variety of applications with minimal external components.

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