TPS542951RSAR

Voltage Regulators - DC DC Switching Regulators Overview

The TPS542951RSAR is a dual-channel synchronous step-down converter manufactured by Texas Instruments. It operates with an input voltage range of 4.5 V to 18 V and provides two adjustable output channels, each capable of delivering up to 3 A. The device utilizes D-CAP2 control mode and features Eco-Mode for light-load efficiency. Key electrical parameters include a fixed switching frequency of 700 kHz, a minimum output voltage of 760 mV, and a maximum output voltage of 7 V. It functions within an operating temperature range of -40°C to +85°C and is housed in a 16-pin QFN package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Dual-channel synchronous buck topology supporting independent or combined load configurations
• D-CAP2 control architecture providing stable operation without external compensation networks
• Integrated Eco-Mode technology to enhance efficiency during light-load conditions
• Internal soft-start mechanism to limit inrush current during startup

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial equipment power distribution
• Power supply stages for embedded systems and communication modules
• Voltage conversion for microprocessor and FPGA core supplies
• Battery-powered devices requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix RSAR against the manufacturer datasheet to confirm the tape-and-reel packaging configuration and pinout compatibility. Ensure that the ordering information matches the required quantity increments and lead times specified by authorized distributors. Cross-reference the component marking code with official documentation to prevent counterfeit substitution.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a dual-output solution is required from a single controller to reduce board space. The 700 kHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the thermal performance of the QFN-16 package relative to the expected load current and ambient temperature constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the TPS54295 family of dual-channel converters. It shares architectural similarities with the TPS54295 and TPS54395 but offers distinct current ratings and package options. The RSAR suffix specifically denotes the reel-based packaging format used for automated surface-mount assembly processes.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct functional substitutes include the TPS54295 and TPS54395 series variants. Verify pin-to-pin compatibility and ensure that the replacement part meets the same input voltage and current requirements.