LM2647LQ/NOPB

DC DC Switching Controllers Overview

The LM2647LQ/NOPB is a dual synchronous buck controller from Texas Instruments, designed for high-efficiency power conversion. It operates with a fixed switching frequency of 500 kHz and supports an input voltage range of 4.5 V to 5.5 V. The device provides two adjustable output channels, each capable of delivering up to 20 A. Output voltages are adjustable from 600 mV to 5 V. It features a maximum duty cycle of 50% and operates within a temperature range of -5°C to +125°C. The controller utilizes a voltage-mode control architecture and is housed in a compact LLP-28 package.

DC DC Switching Controllers Feature Summary

• Dual-channel synchronous buck topology for independent power rail generation
• Voltage-mode control architecture ensuring stable regulation under varying load conditions
• Integrated shutdown capability for efficient power management and system sleep modes

DC DC Switching Controllers Applications

• Multi-rail power distribution systems for embedded processors
• Point-of-load (POL) conversion for digital logic circuits
• Industrial equipment requiring isolated or non-isolated dual DC/DC steps

DC DC Switching Controllers Procurement Notes

Verify the specific suffix LQ against the manufacturer's official datasheet to confirm package type and thermal characteristics. Ensure compatibility with the intended PCB footprint for the LLP-28 package. Cross-reference RoHS compliance status directly with the component documentation before procurement to meet regulatory requirements.

DC DC Switching Controllers Selection Notes

Select this component when dual independent outputs are required from a single controller IC. It is suitable for applications needing high current delivery up to 20 A per channel. Consider the 500 kHz switching frequency for balancing efficiency and passive component size. Verify that the input voltage range aligns with the system's available power supply rails.

DC DC Switching Controllers Part Context

This part belongs to the LM2647 family of synchronous buck controllers. It is distinct from linear regulators and charge pump devices found in other Texas Instruments series. The device serves as a dedicated switching controller rather than an integrated converter, requiring external MOSFETs and inductors for operation.

DC DC Switching Controllers Replacement Considerations

Consult official substitution guides for pin-compatible alternatives within the same product family. Verify electrical parameters such as switching frequency and current limits before replacing with similar models.