TPS51221RTVR

Voltage/Current - Output 3:	5V, 100mA
Base Part Number:	TPS51221
Supplier Device Package:	32-WQFN (5x5)
Package / Case:	32-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	4.5 V ~ 28 V
w/Sequencer:	No
w/Supervisor:	No
w/LED Driver:	No
Series:	--
Voltage/Current - Output 2:	3.3V, 10mA
Voltage/Current - Output 1:	Controller
Frequency - Switching:	200kHz ~ 1MHz
Number of Outputs:	3
Function:	Any Function
Topology:	Step-Down (Buck) Synchronous (1), Linear (LDO) (2)
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS51221RTVR Application Field and Working Principle

Introduction

The Texas Instruments TPS51221RTVR is a type of PMIC Voltage Regulator that has both linear and switching voltage modes. This device is a high performance system power manager IC which provides voltage regulation for the main regulator, auxiliary regulator, system power sequencing, power control, and power supply sequencing.

Application Fields

TPS51221RTVR is designed to be used in battery powered systems and electronic devices. This device is useful in a variety of applications including laptops, tablets, cell phones, and portable devices. This device is especially useful in applications such as networking systems, high capacity data storage systems, and digital appliances.

Working Principle

The TPS51221RTVR allows the system to operate in two distinct voltage modes—linear and switching. In linear mode, the output voltage is determined by the control voltage plus the desired value of the internal reference voltage. In switching mode, the supply voltage is held at a constant level, and the output voltage is determined by the voltage of the internal switching regulator.The TPS51221RTVR has two main stages of operation. The first stage is the voltage regulation loop. This consists of a controller and an error amplifier. The error amplifier compares the output voltage to the control voltage and adjusts the power converter accordingly. The second stage is the power conversion stage. This stage consists of a voltage regulator and a buck converter. The voltage regulator regulates the output voltage and supplies it to the buck converter, which then converts the voltage to the desired level.The TPS51221RTVR also provides protection against over voltage, under voltage, over current, and over temperature conditions. All of these protections are implemented using dedicated pins and registers.

Conclusion

The TPS51221RTVR is an efficient and reliable voltage regulator that is used in a variety of battery powered and other electronic systems. Its linear and switching voltage modes provide a degree of flexibility when it comes to powering system components. This device also provides a wide range of protection features that help ensure system safety.

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