LM2717MTX-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2717MTX-ADJ/NOPB is a dual step-down DC/DC converter manufactured by Texas Instruments. It integrates two independent synchronous buck converters within a single package, designed for applications requiring multiple voltage rails from a single input source. The device operates with an input voltage range of 4V to 20V and supports adjustable output voltages via external resistors. It features a switching frequency of up to 720 kHz, allowing for the use of small passive components. The controller includes comprehensive protection features such as cycle-by-cycle current limiting, thermal shutdown, and soft-start functionality to ensure reliable operation under various load conditions.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Dual independent synchronous buck converter architecture
• Adjustable output voltage control via external feedback resistors
• Integrated cycle-by-cycle current limiting and thermal shutdown protection
• High switching frequency capability for compact passive component selection

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronics requiring multiple power rails
• Industrial control systems with mixed voltage requirements
• Communication equipment power distribution networks
• Embedded systems utilizing single-input multi-output power architectures

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the ordering suffix /NOPB confirms lead-free and RoHS compliance status as per the manufacturer's latest documentation. Confirm the package type matches the required PCB footprint, specifically the 24-pin TSSOP configuration. Ensure the design accounts for the adjustable output voltage setting resistors, as the device does not provide fixed internal reference outputs without external components. Cross-reference the specific revision level in the datasheet to confirm pinout compatibility with existing designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a single IC solution is preferred over discrete controllers to save board space. The dual-channel design is optimal for systems needing two isolated or non-isolated regulated outputs from one input rail. Consider the thermal performance requirements, as dual synchronous rectifiers generate significant heat under high load conditions. Verify that the required output voltage ranges fall within the adjustable limits supported by the external resistor network configuration.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2717 family of dual step-down converters originally developed by National Semiconductor before its acquisition by Texas Instruments. The /NOPB suffix indicates a non-plumb (lead-free) version compliant with environmental directives. It serves as a direct replacement for earlier leaded versions like the LM2717MTX-ADJ, maintaining functional equivalence while adhering to modern manufacturing standards.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

• LM2717MTX-ADJ

Voltage Regulators - DC DC Switching Regulators FAQ

Is the LM2717MTX-ADJ/NOPB a synchronous rectifier?

Yes, the device integrates two synchronous buck converters, meaning it uses internal MOSFETs for both high-side and low-side switching to improve efficiency compared to asynchronous designs.

What is the maximum switching frequency of the LM2717MTX-ADJ/NOPB?

The device supports a switching frequency of up to 720 kHz, which allows for the use of smaller inductors and capacitors compared to lower-frequency alternatives.