LM70880QRRXRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM70880QRRXRQ1 is an automotive-grade synchronous buck DC/DC converter designed for high-density power applications. It features a wide input voltage range of 4.5V to 80V and delivers up to 8A of output current. The device supports fixed outputs of 3.3V, 5V, or 12V, as well as adjustable outputs from 0.8V to 55V with 1% accuracy. Operating frequencies range from 200kHz to 2.2MHz, utilizing peak current-mode control for fast transient response. It incorporates dual-random spread spectrum (DRSS) for low EMI performance and includes integrated protection features such as thermal shutdown and hiccup mode overcurrent protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Wide input voltage range supporting 4.5V to 80V operation for robust supply rail handling
• Dual-random spread spectrum (DRSS) functionality to minimize electromagnetic interference emissions
• Peak current-mode control architecture enabling rapid line and load transient response
• Integrated high-side and low-side power MOSFETs within a thermally optimized QFN-29 package

Voltage Regulators - DC DC Switching Regulators Applications

• High-current automotive electronic systems
• Advanced Driver Assistance Systems (ADAS)
• Body electronics modules
• Infotainment systems and instrument clusters

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes against official Texas Instruments documentation to ensure correct packaging and temperature grade specifications. Confirm that the specific revision matches the required design-in parameters. Cross-reference datasheet electrical characteristics with system requirements prior to ordering. Ensure compliance with automotive quality standards relevant to the target application environment.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for designs requiring high input voltage tolerance up to 80V and significant output current capability. Consider the DRSS feature if strict EMI compliance is necessary without external filtering. Evaluate thermal management requirements based on the QFN-29 package and expected load conditions. Verify compatibility with existing clock synchronization needs if operating outside the default free-running frequency range.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM708x0 family of low IQ, wide VIN synchronous buck converters. It shares architectural similarities with other members in the series but is distinguished by its specific 8A current rating and 80V maximum input voltage capability. The family utilizes a common pinout and control logic, facilitating scalable design implementations across various power density requirements.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official substitution guides for verified alternatives. Generic replacements may not match the specific automotive qualification or EMI performance characteristics.