LP873344RHDRQ1

Overview

The LP873344RHDRQ1 is an automotive-grade PMIC featuring two high-current buck converters and two linear regulators. It operates within a 2.8 V to 5.5 V input range, delivering up to 3 A per buck channel. Buck outputs are adjustable from 800 mV to 3.36 V with a fixed switching frequency of 2 MHz. The device includes two LDOs providing 300 mA each. It is housed in a 28-pin VQFN package and certified to AEC-Q100 standards for operation between -40°C and +125°C.

Feature Summary

• Integrates dual high-current synchronous buck converters and dual low-dropout linear regulators in a single compact package.
• Features a fixed 2 MHz switching frequency for the buck converters to optimize external component size.
• Designed for automotive environments with AEC-Q100 qualification and extended temperature range support.

Applications

• Automotive infotainment systems
• Digital cockpit domain controllers
• Telematics control units

Procurement Notes

Verify the specific suffix RHDRQ1 confirms the 28-pin VQFN package and Q1 automotive grade. Confirm that the 800 mV minimum output voltage meets system requirements, as it differs from other variants in the series. Ensure ESD handling protocols are followed due to moisture sensitivity classification.

Selection Notes

Select this part when both high-current buck regulation and auxiliary LDO power are required simultaneously. Compare against the LP873300RHDRQ1 if higher maximum output voltages (up to 3.6 V) are needed. Verify that the 2 MHz fixed frequency aligns with EMI constraints compared to variable frequency alternatives.

Part Context

This component belongs to the LP8733xx-Q1 family of multi-channel power management ICs. It complements other variants like the LP873300 and LP873245 by offering a mixed topology solution combining switching regulators with linear outputs for noise-sensitive loads.

Replacement Considerations

LP873300RHDRQ1 offers similar architecture but supports higher maximum output voltages up to 3.6 V. LP873245RHDRQ1 provides lower current capacity at 2 A per buck converter. Cross-check pin compatibility and thermal performance before substitution.

FAQ

What is the switching frequency of the buck converters?

The buck converters operate at a fixed switching frequency of 2 MHz.

What is the minimum output voltage for the buck channels?

The minimum adjustable output voltage for the buck converters is 800 mV.