LM2611AMF-NS

Voltage Regulators - DC DC Switching Regulators Overview

The LM2611AMF-NS is a Cuk converter switching regulator manufactured by National Semiconductor, now part of Texas Instruments. It operates with an input voltage range of 2.7V to 14V and delivers up to 1.2A output current. The device features a fixed switching frequency of 1.4MHz and provides adjustable negative output voltages ranging from -36V to -1.23V. It is housed in a compact SOT-23-5 package and supports surface-mount installation. The component functions as both a buck and inverting regulator within an operating temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Implements Cuk topology for simultaneous step-down and inverting voltage conversion capabilities
• Integrates a high-frequency 1.4MHz switching controller to minimize external passive component size
• Provides adjustable negative output regulation suitable for single-supply applications requiring inverted rails

Voltage Regulators - DC DC Switching Regulators Applications

• Portable devices requiring negative supply rails from a single positive battery source
• Industrial control systems needing isolated or inverted logic levels
• Sensor interfaces requiring dual polarity power from a unified input

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix designation against official Texas Instruments documentation, as the LM2611AMF series has undergone lifecycle changes. Confirm RoHS compliance status and ensure the supplier provides valid traceability for the National Semiconductor era manufacturing data. Cross-reference the exact part number with current TI databases to confirm availability and active status before finalizing procurement plans.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing circuits that require both step-down and inverting functionality from a single switch. Ensure the input voltage remains within the 2.7V to 14V limit. Consider the thermal performance of the SOT-23-5 package under maximum load conditions. Verify that the required negative output voltage falls within the specified -36V to -1.23V adjustment range for optimal regulation stability.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the LM2611 family of DC/DC converters originally developed by National Semiconductor. Following the acquisition by Texas Instruments, the product line was integrated into TI's power management portfolio. The device represents a specialized solution for applications needing complex voltage translation in a minimal footprint, bridging legacy NS designs with modern PMIC requirements.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM2611AMFX/NOPB is a documented parameter-equivalent replacement for the LM2611AMF series. Verify pin compatibility and electrical specifications before substitution. Note that the original LM2611AMF may be discontinued; consult official TI notices for end-of-life status and recommended alternative sourcing channels.