NX2838CMTR

Overview

The NX2838CMTR is a dual-output power management integrated circuit manufactured by Microsemi Corporation. It combines a synchronous step-down (buck) converter and a linear low-dropout (LDO) regulator in a single package. The device operates with an input voltage range of 8V to 32V and supports a switching frequency between 200kHz and 1MHz. One output provides a fixed 3.3V at up to 700mA, featuring an integrated LED driver. The component is designed for operation within a temperature range of 0°C to 70°C.

Feature Summary

• Integrates a synchronous buck converter and a linear LDO regulator for dual-output power delivery
• Includes an integrated LED driver capability on the linear output channel
• Supports adjustable switching frequencies ranging from 200kHz to 1MHz
• Operates reliably across a standard commercial temperature range

Applications

• Power supply modules requiring combined switching and linear regulation
• LED lighting control circuits utilizing the integrated driver
• Embedded systems needing stable 3.3V logic power alongside switched rails
• Industrial control boards operating within specified voltage and temperature limits

Procurement Notes

Verify the exact suffix 'CMTR' matches your board design requirements, as it indicates specific packaging and tape-and-reel configuration. Confirm that the 3.3V fixed output aligns with your load needs, as this variant does not offer adjustable voltage on the LDO channel. Ensure your PCB layout accommodates the thermal requirements for the 38-lead MLPQ package during high-load operations.

Selection Notes

Select this component when a compact solution is needed to provide both efficient switching power and clean linear regulation simultaneously. It is suitable for designs where space is constrained but multiple voltage domains are required. Consider the 3.3V fixed output limitation; if variable LDO voltage is needed, alternative models must be evaluated. Verify that the 8V-32V input range covers your system's supply variations.

Part Context

This part belongs to Microsemi's PMIC family, specifically designed for applications requiring mixed-mode regulation. It consolidates functions typically handled by separate discrete components, reducing bill of materials count. The integration of an LED driver distinguishes it from standard dual-regulator ICs, targeting specialized lighting or indicator applications within broader electronic systems.

Replacement Considerations

Direct substitutes require matching the dual-buck/LDO topology and 38-lead MLPQ package. Verify input voltage compatibility and ensure the replacement offers similar current ratings for the 3.3V output. Check if the substitute includes an LED driver if that feature is critical to the original design intent.

FAQ

Does the NX2838CMTR include a supervisor function?

No, the datasheet specifications indicate that this device does not include a built-in supervisor function.

What is the fixed output voltage of the LDO channel?

The linear regulator channel provides a fixed output voltage of 3.3V with a maximum current capacity of 700mA.