LM5100AMX/NOPB

Overview

The LM5100AMX/NOPB is a high-voltage half-bridge gate driver manufactured by Texas Instruments, originally developed under the National Semiconductor brand. It integrates independent high-side and low-side drivers designed to drive power MOSFETs in hard-switching applications. The device features a bootstrap diode for high-side supply generation and supports supply voltages up to 100V. It operates with CMOS-compatible logic inputs and provides peak output currents of 3A for sourcing and 2A for sinking. The component is housed in a 10-pin SOIC package and functions within an industrial temperature range.

Feature Summary

• Integrates independent high-side and low-side gate drivers for half-bridge configurations
• Includes an internal bootstrap diode to simplify high-side biasing requirements
• Supports high-voltage operation with supply ranges extending to 100V
• Features fast switching characteristics with low propagation delay

Applications

• Hard-switching power supplies
• Motor control systems
• Industrial motor drives

Procurement Notes

Verify that the ordering suffix /NOPB confirms lead-free compliance and RoHS standards as per Texas Instruments specifications. Confirm the manufacturer origin, as National Semiconductor assets are managed by TI. Ensure the AMX suffix corresponds to the tape-and-reel packaging format rather than tube packaging. Validate the pinout compatibility with the target PCB footprint before integration.

Selection Notes

Select this component when designing circuits requiring a single-chip solution for driving complementary MOSFET pairs. The integrated bootstrap diode reduces external component count compared to discrete driver solutions. Consider the 3A/2A current capability for driving medium-power MOSFETs. Verify that the input logic levels match the control microcontroller or DSP outputs without additional level shifting.

Part Context

This part belongs to the LM5100 family of high-voltage gate drivers. It is functionally related to variants such as the LM5100A and LM5100B, which differ primarily in output current ratings and package options. The LM5100 series is widely used in legacy and modern power conversion designs where robust high-side driving is required.

Replacement Considerations

Direct substitutes include the LM5100AM/NOPB (tube package) and LM5100BMX/NOPB. Cross-reference with NCV51511 from ON Semiconductor for similar functionality. Verify pin-to-pin compatibility and electrical parameter alignment before substitution.