LM5109MA/NOPB

Overview

The LM5109MA/NOPB is a high-voltage half-bridge gate driver manufactured by Texas Instruments. It features independent high-side and low-side drivers with a peak output current of 1 A. The device operates within a supply voltage range of 8 V to 14 V and supports TTL logic inputs. It provides fast switching characteristics, including rise and fall times of 15 ns, and propagation delays up to 29 ns. The component is housed in an SOIC-8 package and functions reliably across an operating temperature range from -40 °C to +125 °C.

Feature Summary

• Independent high-side and low-side driver outputs for flexible half-bridge configurations
• High peak output current capability of 1 A for efficient MOSFET switching
• TTL-compatible input logic levels for direct interface with standard control signals

Applications

• Synchronous buck converter gate driving
• Half-bridge power stage control
• Isolated DC-DC converter interfaces

Procurement Notes

Verify the specific suffix MA against the official datasheet to confirm package type and material specifications. Ensure compatibility with system voltage requirements and thermal management needs. Cross-reference the manufacturer's latest documentation for any design-in recommendations or lifecycle status updates before finalizing procurement decisions.

Selection Notes

Select this component when a robust half-bridge driver with independent channel control is required. The 1 A peak current suits medium-power applications. Verify that the SOIC-8 package fits the PCB layout constraints. Confirm that the 8 V to 14 V supply range aligns with the available system rails and that TTL input thresholds match the driving logic family.

Part Context

This part belongs to the LM5109 series of high-voltage gate drivers from Texas Instruments. The series is designed for driving N-channel power MOSFETs in half-bridge topologies. The NOPB suffix indicates compliance with RoHS standards and absence of lead-based materials, distinguishing it from older non-compliant variants.

Replacement Considerations

Check for LM5109MAX/NOPB as a potential alternative if different packaging is acceptable. Verify pinout compatibility and electrical parameters against the original specification sheet before substitution.