TPS71433DRVR

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TPS71433DRVR is a high-performance voltage regulator with a 1.2MHz switching frequency for the most efficient supply of low voltage, space-critical designs. It offers superior ripple rejection performance, enabling designers to increase system power and reduce noise. This linear regulator can operate from a 1.75 V input to a 5 V output with a maximum output current of 1 A and a small 2.5 mm × 2.5 mm DFN package. This application field and working principle of TPS71433DRVR will be introduced in the following.

Application Field

TPS71433DRVR is suitable for a variety of applications that require superior power regulation. Its advanced switching technique and low dropout characteristics make it a great choice for powering very low voltage and low power digital circuits. Its small size is suitable for powering space-constrained designs such as digital still cameras, phones, and implantable medical devices. Besides, it is also suitable for providing constant current / voltage to LED backlighting, analog sensors, amplifiers, and image sensors requiring stable bias.

Working Principle

TPS71433DRVR is a linear voltage regulator designed for low voltage applications. The integrated 0.2 Ohm MOSFET allows better performance at lower output current of up to 1 A. The regulator has a hysteretic architecture which eliminates the need for a loop compensation network and provides superior power supply ripple rejection. The hysteretic architecture allows for a fast current control and extremely fast transient response.

TPS71433DRVR is based on the internally generated reference voltage, in order to provide an accurately regulated output voltage to the load. The internal voltage reference of the regulator is compared to the divided value of the output voltage by an error amplifier to determine the drive of the MOSFET switch. The MOSFET is switched on and off in order to adjust the output voltage. The frequency of the switching is set by an internal oscillator.

In order to minimize power loss, the MOSFET of the regulator is turned off when the load current is low, which also helps to reduce output voltage ripple. The regulator also integrates a slew control and Soft-Off function to enable minimum power dissipation at light load and when device is in Standby mode. Moreover, the TPS71433DRVR contains short circuit protection and thermal shutdown to protect the device from any damage.

Conclusion

TPS71433DRVR was designed for low voltage applications and provides superior power regulation with 1.2MHz switching frequency for the most efficient supply of low voltage, space-critical designs. Its advanced switching technique and low dropout characteristics make it great for powering very low voltage and low power digital circuits, LED backlighting, analog sensors, amplifiers, and image sensors requiring stable bias. The integrated 0.2 Ohm MOSFET enables optimal performance and an internal voltage reference provides an accurately regulated output voltage. Furthermore, the device integrates a slew control and Soft-Off function, as well as short circuit protection and thermal shutdown.

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