LM5105SD

Overview

The LM5105SD is a half-bridge gate driver IC manufactured by Texas Instruments, designed for driving N-channel MOSFETs. It operates with a supply voltage range of 8V to 14V and supports a maximum high-side bootstrap voltage of 118V. The device features non-inverting inputs and delivers peak output currents of 1.8A for both sourcing and sinking. Typical rise and fall times are 15ns. It is housed in a 10-WSON (4x4) package with a bare pad and functions within a junction temperature range of -40°C to 125°C.

Feature Summary

• Provides synchronous half-bridge drive configuration for N-channel MOSFETs
• Supports high-voltage operation with up to 118V bootstrap capability
• Features fast switching characteristics with typical 15ns rise and fall times
• Includes undervoltage lockout protection for reliable operation

Applications

• High-frequency power conversion circuits
• Industrial motor control systems
• Automotive power electronics applications

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as the LM5105SD is listed as non-compliant in some records. Check for the availability of the LM5105SD/NOPB variant if lead-free requirements are mandatory. Ensure packaging type matches system assembly needs, as this part is typically supplied in tape and reel formats.

Selection Notes

Select this component when a robust half-bridge driver with high voltage tolerance is required. The 1.8A peak current capability suits moderate-power MOSFET switching applications. Consider the 10-WSON package size for space-constrained designs. Verify that the input logic levels align with the controller's output specifications before integration into the circuit design.

Part Context

The LM5105SD belongs to Texas Instruments' family of high-voltage gate drivers. It is specifically engineered for applications requiring isolated or floating high-side switching capabilities. The device integrates necessary protection features to ensure stable performance in noisy electrical environments common in power electronics.

Replacement Considerations

The LM5105SD/NOPB is a direct replacement option. This variant offers identical functionality but complies with RoHS standards. Verify pin compatibility and thermal characteristics when substituting to ensure seamless integration without redesigning the PCB layout.

FAQ

Is the LM5105SD available in a lead-free package?

Standard LM5105SD units are not RoHS compliant. The LM5105SD/NOPB variant is the lead-free alternative.

What is the maximum voltage rating for the high-side bootstrap supply?

The maximum high-side voltage with bootstrap support is 118V.