LM2854MHX-500/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2854MHX-500/NOPB is a synchronous buck regulator from Texas Instruments, housed in an HTSSOP-16 package. It operates with an input voltage range of 2.95 V to 5.5 V and delivers up to 4 A output current. The device supports switching frequencies of 500 kHz or 1 MHz, with a typical frequency of 525 kHz. Output voltage is adjustable from 800 mV to 5 V. It functions within a temperature range of -40°C to +85°C and features a load regulation of 0.25 mV/A.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates high-side and low-side N-channel power MOSFETs for efficient synchronous rectification.
• Includes internal compensation to minimize external component count.
• Features programmable soft-start to control inrush current during startup.
• Provides thermal shutdown protection to prevent damage under overload conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded processors
• Battery-powered portable devices
• Industrial control systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free and RoHS compliance as per manufacturer specifications. Confirm the HTSSOP-16 package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your environmental constraints. Cross-reference the datasheet revision date to confirm technical accuracy before integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution is required for converting 3.3 V or 5 V inputs to lower voltages at high currents. The synchronous design offers superior efficiency compared to standard diode-based regulators. Consider the fixed feedback resistor option if a specific output voltage like 1.2 V or 1.5 V is needed without external adjustment components.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2854 family of PowerWise SIMPLE SWITCHER regulators. It is designed for applications requiring high efficiency and small solution size. The device integrates all necessary control logic and power switches into a single monolithic IC, simplifying the design process for engineers developing compact power supplies.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct pin-compatible alternatives within the same family that may offer different fixed output voltages or updated manufacturing revisions. Verify that any substitute maintains the same HTSSOP-16 package and electrical characteristics to ensure seamless integration without PCB redesign.

Voltage Regulators - DC DC Switching Regulators FAQ

How is the output voltage determined?

The output voltage is set by an external resistor divider connected to the feedback pin, allowing adjustment from 800 mV to 5 V.

What is the purpose of the EN pin?

The EN pin is a high-active enable input used to turn the regulator on or off, typically controlled by a microcontroller GPIO or a power sequence circuit.