LP877451A1RXVR

Overview

The LP877451A1RXVR is an automotive-grade PMIC from the LP8774x-Q1 series, designed for radar MMIC power management. It integrates three 3-A low-noise buck converters, a 5-V boost converter, and a 1.8-V or 3.3-V LDO. The device supports programmable switching frequencies of 4.4 MHz, 8.8 MHz, or 17.6 MHz. Input voltage ranges from 3 V to 4 V. Operating temperature spans -40°C to +125°C. It features SPI interface control, NVM programming, and AEC-Q100 Grade 1 certification.

Feature Summary

• Integrates three independent 3-A low-noise buck converters optimized for RF applications
• Includes a 5-V boost converter and a dedicated LDO for I/O power supply requirements
• Supports programmable switching frequencies up to 17.6 MHz with external clock synchronization
• Features non-volatile memory (NVM) configuration and precise output voltage slew rate control

Applications

• Short-range and mid-angle automotive radar systems
• Long-range front-facing radar applications
• Ultra-short-range radar modules
• Powering AWR and IWR MMICs in industrial radar setups

Procurement Notes

Verify the Q1 automotive qualification suffix when sourcing replacements, as standard commercial variants lack required reliability certifications. Confirm package type matches VQFN-28 specifications. Ensure ESD handling protocols are followed due to moisture sensitivity classification. Cross-reference pinouts with official datasheets before integration into existing PCB layouts.

Selection Notes

Select this component for designs requiring high-current, low-noise power rails for sensitive RF front-ends. The integrated boost and LDO reduce external component count compared to discrete solutions. Consider the 17.6 MHz option if minimizing passive filter size is critical. Verify thermal performance under maximum load conditions across the full automotive temperature range.

Part Context

This part belongs to the LP8774x-Q1 family of specialized power management ICs developed by Texas Instruments. The series targets complex radar architectures where multiple regulated voltages are needed simultaneously. It consolidates functions that would otherwise require separate regulators, saving board space and improving system efficiency in compact automotive enclosures.

Replacement Considerations

LP877451A1RXVRQ1