LM5106SD/NOPB

Overview

The LM5106SD/NOPB is a high-voltage half-bridge gate driver designed to drive high-side and low-side N-channel MOSFETs in synchronous buck or half-bridge configurations. It features a floating high-side driver capable of operating at rail voltages up to 100 V, with a bootstrap supply voltage range extending to 118 V DC. The device provides a peak output sink current of 1.8 A and a source current of 1.2 A. It operates with a single TTL-compatible control input and includes an enable pin. Key electrical parameters include a supply voltage range of 8 V to 14 V, typical rise and fall times of 15 ns and 10 ns respectively, and a propagation delay for fast turn-off of approximately 32 ns. The component supports programmable dead-time via an external resistor and functions within a junction temperature range of -40°C to 125°C.

Feature Summary

• Drives high-side and low-side N-channel MOSFETs in synchronous buck or half-bridge topologies
• Features a floating high-side driver with a bootstrap supply voltage range up to 118 V DC
• Includes a single TTL-compatible control input and an enable pin for power management
• Supports programmable turn-on delay (dead-time) using a single external resistor

Applications

• Synchronous buck converter applications requiring high-side and low-side gate driving
• Half-bridge power conversion circuits
• Industrial motor drives utilizing N-channel MOSFETs
• Automotive power electronics systems

Procurement Notes

Verify the specific suffix NOPB indicates lead-free and RoHS compliance when sourcing. Confirm the SDX package designation corresponds to the 10-WSON thermal enhancement package required for your thermal design. Ensure the ordering quantity matches the tape and reel specifications provided by the distributor. Cross-reference the manufacturer part number with official Texas Instruments documentation to confirm current production status and availability.

Selection Notes

Select this component when driving N-channel MOSFETs in high-voltage environments up to 100 V rails. It is suitable for designs requiring precise dead-time control via a single external resistor rather than digital adjustment. Consider the 10-WSON package for its thermal performance and compact footprint. Ensure the control logic interface is compatible with the specified TTL input levels and that the supply voltage remains within the 8 V to 14 V operational window.

Part Context

The LM5106 belongs to Texas Instruments' family of high-voltage half-bridge gate drivers. It serves as a successor or alternative to earlier models like the LM5105, offering enhanced performance characteristics such as improved peak currents and refined timing control. The device is engineered for robust operation in demanding power conversion applications, providing reliable switching capabilities for synchronous rectification and half-bridge topologies.

Replacement Considerations

The LM5105SD/NOPB is documented as a direct replacement for the discontinued LM5105SD. Verify pinout compatibility and parameter alignment between the LM5106 and potential substitutes before implementation.

FAQ

How is the dead-time programmed on the LM5106?

The turn-on delay, which sets the dead-time, is programmed using a single external resistor connected to the device.

What is the maximum voltage rating for the high-side driver?

The floating high-side driver can operate at rail voltages up to 100 V, with a bootstrap supply voltage range extending to 118 V DC.

Is the control input compatible with standard logic levels?

Yes, the LM5106 features a single control input that is compatible with TTL signal levels.