LM5106MM/NOPB

Overview

The LM5106MM/NOPB is a high-voltage half-bridge gate driver designed for synchronous buck or half-bridge configurations. It drives high-side and low-side N-channel MOSFETs with a floating high-side driver supporting up to 100 V rail voltage. Key electrical parameters include a peak output sink current of 1.8 A and a source current of 1.2 A. The device operates within an input voltage range of 8 V to 14 V, featuring rise and fall times of 15 ns and 10 ns, respectively. It includes under-voltage lockout (UVLO) at 8 V, programmable dead-time via a single external resistor, and an enable pin. The component is housed in a 10-pin VSSOP package.

Feature Summary

• Supports driving high-side and low-side N-channel MOSFETs in half-bridge or synchronous buck topologies
• Features a floating high-side driver capable of handling up to 100 V bus voltage
• Includes programmable turn-on delay for precise dead-time control using a single external resistor
• Integrates under-voltage lockout to disable drivers when supply voltages fall below operational thresholds

Applications

• High-side and low-side N-channel MOSFET gate driving in power conversion circuits
• Synchronous buck converter implementations requiring isolated high-side drive
• Half-bridge power stage configurations with programmable switching timing

Procurement Notes

Verify the suffix /NOPB indicates lead-free and RoHS compliance compared to older non-NOPB variants. Confirm the MM package designation corresponds to the 10-pin VSSOP form factor. Ensure the specific revision matches design requirements for thermal performance and pin compatibility. Cross-reference datasheet specifications against application voltage and current demands before finalizing procurement orders.

Selection Notes

Select this component for applications requiring a single TTL-compatible input to control both high-side and low-side switches. The integrated programmable dead-time simplifies timing adjustments without complex logic. Consider the 1.8 A sink capability for driving larger MOSFET gates efficiently. Verify that the 8 V UVLO threshold aligns with the system's minimum operating voltage constraints.

Part Context

This part belongs to the LM5106 family of high-voltage gate drivers from Texas Instruments. It serves as a direct replacement for the discontinued LM5106MM, offering updated manufacturing standards. The device is part of TI's broader portfolio of power management ICs focused on efficient motor and power supply control solutions.

Replacement Considerations

LM5106MM/NOPB is the direct replacement for the obsolete LM5106MM. Both share identical functional specifications and pinouts. Verify package compatibility when transitioning from legacy stock to ensure mechanical fitment remains unchanged.

FAQ

How is the dead-time programmed?

Dead-time is programmed using a single external resistor connected to the device, which sets the turn-on delay for tight matching between switching transitions.

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

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