LM2611AMF

Voltage Regulators - DC DC Switching Regulators Overview

The LM2611AMF is a discontinued Cuk converter switch regulator manufactured by Texas Instruments. It operates at a fixed switching frequency of 1.4 MHz and supports an input voltage range from 2.7 V to 14 V. The device provides a single adjustable negative output ranging from -36 V to -1.23 V with a maximum output current of 1.2 A. It utilizes a SOT-23-5 surface-mount package and functions within a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Implements Cuk topology for inverting and step-down voltage conversion capabilities
• Integrates a fixed 1.4 MHz switching frequency to minimize external component size
• Features adjustable negative output regulation via external resistor network

Voltage Regulators - DC DC Switching Regulators Applications

• Negative voltage generation for operational amplifier biasing
• Power supply stages requiring inverting DC-DC conversion
• Portable electronics utilizing single-cell battery inputs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the LM2611AMF status as obsolete before procurement planning. Confirm availability of the equivalent LM2611AMFX/NOPB variant for new designs. Validate that legacy inventory sources provide genuine components matching the original National Semiconductor or Texas Instruments specifications. Ensure compatibility with existing PCB footprints if replacing active units.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component only for maintenance of existing hardware due to its discontinuation status. Evaluate the LM2611AMFX/NOPB as the primary functional substitute for new implementations. Consider thermal management requirements associated with the SOT-23-5 package during high-current operation. Verify that the 1.4 MHz frequency aligns with electromagnetic interference constraints in the target application.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2611AMF belongs to the LM2611 series of power management integrated circuits originally developed by National Semiconductor and later acquired by Texas Instruments. This specific part number represents the non-rohs compliant version packaged in SOT-23-5. It serves as the predecessor to the environmentally compliant LM2611AMFX/NOPB, which maintains identical electrical characteristics while adhering to modern regulatory standards.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM2611AMFX/NOPB is the confirmed direct replacement for the LM2611AMF. Both parts share identical pinouts, electrical parameters, and functionality. Designers should verify that the 'X' suffix indicates tape-and-reel packaging rather than functional differences.