LM3351MMX/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3351MMX/NOPB is a fixed-frequency current-mode DC-DC controller designed for step-down, boost, and flyback topologies. It operates with an input voltage range of 2.5V to 5.5V and delivers a maximum output current of 50mA. The device integrates a charge pump to generate the high-side gate drive, enabling efficient operation in low-voltage applications. It features a switching frequency of 200kHz and functions within an ambient temperature range of -40°C to 85°C. Packaged in an 8-VSSOP surface-mount case, it provides a compact solution for portable electronics requiring regulated power conversion.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a charge pump for high-side gate drive generation
• Supports step-down, boost, and flyback converter topologies
• Fixed 200kHz switching frequency for consistent performance

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered devices
• Low-voltage DC-DC conversion systems
• Flyback power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free compliance and RoHS status as per Texas Instruments documentation. Confirm the package type matches the design requirements, specifically the 8-VSSOP form factor. Ensure the operating conditions align with the specified -40°C to 85°C ambient temperature range. Cross-reference the datasheet revision to guarantee compatibility with existing circuit designs and component selections.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact, fixed-frequency controller is needed for low-current applications up to 50mA. It is suitable for designs requiring integrated high-side drive without external bootstrap components. Consider the 2.5V to 5.5V input range for single-cell lithium or USB-powered systems. Evaluate the 200kHz frequency against EMI constraints and inductor size requirements for the target application.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3351 family of DC-DC controllers from Texas Instruments. It shares functional similarities with other members like the LM3351MM but differs in packaging and specific ordering suffixes. The family is characterized by its integrated charge pump and current-mode control, targeting efficiency in small-footprint power management solutions for consumer electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute: LM3351MM/NOPB.