CS5171EDR8G

Voltage - Output (Min/Fixed):	1.28V
Base Part Number:	CS5171
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	280kHz
Current - Output:	1.5A (Switch)
Voltage - Output (Max):	40V (Switch)
Series:	--
Voltage - Input (Max):	30V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck, Boost, Flyback, Forward Converter, SEPIC
Output Configuration:	Positive or Negative
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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CS5171EDR8G is a voltage regulator in the category of PMIC – Voltage Regulators – DC DC Switching Regulators. It is a high-performance, fixed-frequency step-down voltage regulator that provides a constant output voltage with minimal external components. This voltage regulator is capable of synchronizing with an external clock signal, providing improved noise cancellation, optimized switching performance, and decreased EMI signature. This device is designed on a variable frequency architecture with a low profile package that supports a wide range of input and output voltages. It also features internal soft start, overload protection, undervoltage/overvoltage protection, over-temperature protection, and overcurrent protection for a comprehensive protection suite. Further, the device also provides 3-pin diagnostic pins for real-time status updates. The CS5171EDR8G has a slew of application fields including automotive, industrial, and communication sectors. The device can be employed in applications such as high-efficiency DC-DC converters for powering server boards, data storage systems, control systems, and industrial automation. The device has also found its use in automotive powertrains, infotainment systems, and advanced driver assistance systems.The device supports a wide input voltage range of 4.5V to 28V, output current up to 8A, and an output voltage range of 0.6V to 20V. It is packaged in an 8-pin thermally enhanced UQFN package. The CS5171EDR8G enables input voltage ripple (VRI) above the voltage regulation range. It is able to regulate the output voltage within a voltage regulation range at a fixed switching frequency of 300 kHz, with a typical duty cycle of 33%. The operating principle of the CS5171EDR8G is based on the concepts of pulse width modulation (PWM) and voltage regulation. The controller has an integrated architecture consisting of a PWM block and a voltage regulation block. The PWM block is responsible for the generation of the PWM signal based on the external clock signal, usually a few kHz. The voltage regulation block is responsible for monitoring any changes in the input voltage level or in the output load. Accordingly, the output of the PWM block is configured for maintaining a constant output voltage.The regulating voltage control (RVC) block continuously obtai ns a reference voltage from the voltage regulation block. The PWM generator in the PWM block compares this reference voltage with the internal target voltage of the regulator circuit. The resulting difference decides the ‘on’ and ‘off’ times of the PWM signal. The PWM signal then acts as a switch to regulate the output voltage. The thermal compensation block in the CS5171EDR8G module helps in maintaining the output voltage accurate over wide ambient temperature. The impedance of the voltage regulator loop also influences the output voltage regulation accuracy. To improve this, the feedback resistor must be selected based on the values of ILimit and Tolerance. The accuracy of the voltage regulator is also determined by the selection of the voltage sampling resistor. This resistance should be set to a value of maximum 1/10th of the impedance of the feedback resistor. The CS5171EDR8G is a high-performance voltage regulator ball that provides a constant output voltage with minimal external components. It provides additional features such as increased efficiency, optimized switching performance and decreased EMI signature. The device is designed to operate in various automotive, industrial and communication sector applications, and it provides high output current and wide input and output voltage range. The device is provided in an 8-pin thermally enhanced UQFN package for easy integration into any system design. The working principle of the CS5171EDR8G hinges on the concepts of pulse width modulation (PWM) and voltage regulation, and the feedback resistor and voltage sampling resistor must be chosen with care to improve accuracy.

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