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VIPER22ASTR-E Information
VIPER22ASTR-E by STMicroelectronics is a Switching Regulator or Controller.
Switching Regulator or Controllers are under the broader part category of Power Circuits.
A power circuit delivers electricity in order to operate a load for an electronic device. Power circuits include transformers, generators and switches. Read more about Power Circuits on our Power Circuits part category page.
US Tariff Estimator: VIPER22ASTR-E by STMicroelectronics
Calculations from this tool are estimations only for imports into the United States. Please refer to the distributor or manufacturer and reference official US government sources and authorities to verify any final purchase costs.
This table gives cross-reference parts and alternative options found for VIPER22ASTR-E. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of VIPER22ASTR-E, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
STMicroelectronics recommends a 4-layer PCB with a solid ground plane, and a separate layer for the high-voltage traces to minimize electromagnetic interference (EMI).
To ensure reliable start-up, ensure that the input voltage (VIN) is within the recommended range, and the output capacitor (COUT) is properly sized to handle the output voltage ripple. Also, ensure that the feedback resistors (RFB1 and RFB2) are correctly sized to set the output voltage.
The maximum allowed output current of the VIPER22ASTR-E is 2A, but it can be limited by the thermal performance of the package and the PCB design. It's recommended to derate the output current based on the ambient temperature and the thermal design of the system.
To protect the VIPER22ASTR-E from overvoltage and undervoltage conditions, use a voltage supervisor or a reset IC to monitor the input voltage and shut down the device if it exceeds the recommended range. Additionally, consider using a TVS diode or a zener diode to clamp the input voltage.
The recommended input capacitor value for the VIPER22ASTR-E is 10uF to 22uF, with a voltage rating of at least 50V. The capacitor should be placed as close as possible to the VIN pin to minimize noise and ripple.
