LM5110-1SDX

Overview

The LM5110-1SDX is a dual low-side compound gate driver manufactured by Texas Instruments. It features two independent outputs capable of sourcing and sinking 5A peak current. The device operates within a supply voltage range of 3.5V to 14V and supports non-inverting logic configurations. Key electrical parameters include a typical rise time of 14ns and a fall time of 12ns. It is designed for robust performance in harsh environments, with an operating temperature range from -40°C to +125°C. The component is housed in a 10-pin WSON package with an exposed pad for thermal management.

Feature Summary

• Dual-channel architecture providing independent low-side drive capabilities for synchronous rectification applications.
• Integrated negative output voltage capability to ensure reliable turn-off of high-side or bootstrap-driven MOSFETs.
• High peak output current of 5A per channel to minimize switching losses and improve system efficiency.
• Non-inverting logic interface compatible with standard digital control signals.

Applications

• Synchronous buck converters requiring efficient low-side MOSFET driving.
• Isolated DC-DC converter topologies utilizing bootstrap or isolated power supplies.
• Industrial motor control systems necessitating robust gate drive signals.
• Server and workstation power delivery modules (VRMs).

Procurement Notes

Verify the specific suffix 'X' against the manufacturer's official datasheet to confirm tape-and-reel packaging specifications. Ensure the order includes the '/NOPB' designation if lead-free compliance is required. Cross-reference the 10-pin WSON EP package dimensions with your PCB footprint library to guarantee mechanical compatibility. Confirm that the supply voltage requirements align with your system's available rails before finalizing procurement.

Selection Notes

Select this component when a dual low-side driver with high current capability is needed for synchronous rectification. The integrated negative voltage feature simplifies circuit design by eliminating external level-shifting components in certain topologies. Consider the thermal performance of the WSON package and ensure adequate copper area on the PCB for heat dissipation. Verify that the input logic levels are compatible with your controller's output voltage.

Part Context

The LM5110 belongs to Texas Instruments' family of compound gate drivers designed for high-efficiency power conversion. Unlike simple buffers, these drivers combine level shifting and push-pull stages to handle floating sources effectively. This series targets applications where minimizing dead-time and switching losses is critical for overall system performance and thermal management.

Replacement Considerations

LM5110-1SD/NOPB

FAQ

What is the purpose of the negative output voltage capability?

It allows the driver to pull the gate voltage below the source potential, ensuring complete turn-off of the MOSFET even in high-side or bootstrap configurations where the source voltage may float.

How does the compound driver structure benefit the circuit?

It integrates level shifting and output buffering into a single stage, reducing component count and propagation delay compared to discrete solutions using separate level shifters and buffers.