LP873345RHDT

Overview

The LP873345RHDT is a multi-channel power management IC featuring two high-current buck converters and two low-dropout linear regulators. It operates within an input voltage range of 2.5 V to 5.5 V. The first buck output supports 0.7 V to 3.36 V at 3 A, while the second buck provides 0.7 V to 3.36 V at 3 A. The LDO outputs deliver 0.8 V to 3.3 V at 300 mA. Integrated sequencing controls output ramp order. The device switches at 2 MHz and functions between -40°C and +125°C in a 28-VQFN package.

Feature Summary

• Integrates dual high-current synchronous buck converters with integrated sequencing control for coordinated startup.
• Includes dual low-dropout linear regulators providing additional clean power rails for sensitive analog loads.
• Supports a wide input voltage range suitable for single-cell lithium-ion battery or 5V bus applications.
• Operates at a fixed 2 MHz switching frequency to minimize external passive component size.

Applications

• Industrial appliances requiring multiple regulated voltage rails
• Test and measurement equipment needing precise power sequencing
• Portable devices powered by single-cell lithium batteries

Procurement Notes

Verify the specific suffix RHDT against the official Texas Instruments datasheet to confirm the tape-and-reel packaging configuration. Ensure the design accounts for the 28-VQFN thermal pad requirements for adequate heat dissipation. Confirm that the 2 MHz switching frequency aligns with electromagnetic interference constraints in the target application environment.

Selection Notes

Select this component when a compact solution requires both high-current digital rails and low-noise analog supplies from a single IC. The integrated sequencer simplifies board layout by managing output timing automatically. Consider the 28-VQFN footprint for space-constrained designs where thermal performance must be managed through PCB copper area.

Part Context

This part belongs to the LP8733xx family of specialized PMICs designed for industrial and portable applications. It consolidates multiple power stages into one package to reduce overall system complexity. The integration of buck and LDO regulators allows for efficient power conversion alongside noise-sensitive regulation.

FAQ

What is the switching frequency of the LP873345RHDT?

The device operates at a fixed switching frequency of 2 MHz.

Does the LP873345RHDT include output sequencing?

Yes, the IC features integrated sequencing control to manage the startup order of its outputs.