TPS568215OARNNR

Series:	SWIFT™
Part Status:	Active
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Output Type:	Adjustable (Fixed)
Number of Outputs:	1
Voltage - Input (Min):	4.5V
Voltage - Input (Max):	17V
Voltage - Output (Min/Fixed):	0.6V
Voltage - Output (Max):	5.5V
Current - Output:	8A
Frequency - Switching:	Up to 1.2MHz
Synchronous Rectifier:	Yes
Operating Temperature:	-40°C ~ 150°C (TJ)

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TPS568215OARNNR Application Field and Working Principle

Introduction

TPS568215OARNNR is a two-channel synchronous voltage regulator that can provide up to 6-A sink/source current in each channel. It is a high-efficiency, high-accuracy, low-noise voltage regulator that combines a high-efficiency switching power supply, a precision low dropout (LDO) linear regulator and adjustable current-limit protection. This integrated solution can deliver higher efficiency, superior accuracy and superior noise control for low voltage and power applications. The unique way of combining the LDO and switching power supply technologies allows this voltage regulator to provide extremely low output resistance for excellent transient response and stable output.

Application Field

TPS568215OARNNR is an excellent solution for power applications that require high accuracy, low output resistance, and higher efficiency. It is most suitable for powering microprocessors and memory. Also, it can be used in situations such as the conversion of a battery-operated supply voltage to a higher voltage, voltage calibration, and low-output voltage regulation. It’s also suitable for distributes power across embedded system nodes when high efficiency and accuracy are required.

Working Principle

The TPS568215OARNNR uses an advanced low dropout control architecture to provide high-accuracy, low-noise output voltage regulation. A PWM controlled switching power supply dynamically regulates the output voltage while providing high efficiency. The LDO is used to provide a low-noise output with very low output resistance.The switching power supply is capable of providing up to 6-A sink/source current and can provide high power conversion efficiency. The LDO is capable of providing up to 3-A sink/source current and can provide output voltage accuracy better than ±1.25% over line and load.The PWM control loop works by sensing the output voltage and comparing it (via feedback signal) with a reference voltage. The error signal generated by the signal difference is then used to control the duty cycle of a P-type FET. In this way, the P-type FET acts as a switch between the input voltage and the output voltage, so as to directly regulate the output voltage.The LDO works by sensing the output voltage and comparing it with a reference voltage. The error signal generated by the difference is then used to control a pass transistor, which is in turn used to regulate the output voltage.

Conclusion

To summarize, the TPS568215OARNNR is a high-efficiency, high-accuracy voltage regulator integrated solution that combines an advanced low dropout control architecture and a PWM controlled switching power supply. It provides extremely low output resistance for excellent transient response and stable output, while offering up to 6-A sink/source current in each channel. It is an ideal solution for power applications that require high accuracy, low output resistance, and higher efficiency.

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