Texas Instruments

LM2611AMF

LM2611AMF Description

The LM2611AMF from Texas Instruments is a high-efficiency, 1.2A negative adjustable output DC-DC switching regulator in a compact SOT23-5 package. Designed for Cuk topology, it operates over a 2.7V to 14V input range with a 1.4MHz switching frequency, enabling compact inductor and capacitor selection for space-constrained designs. This surface-mount regulator is ideal for generating negative voltages from positive inputs, making it suitable for applications requiring precise voltage inversion. Its non-synchronous rectification ensures simplicity and cost-effectiveness while maintaining robust performance.

LM2611AMF Features

• Adjustable Negative Output: Provides flexibility for custom voltage requirements.
• Wide Input Range (2.7V–14V): Supports diverse power sources, including batteries and regulated rails.
• High Switching Frequency (1.4MHz): Reduces passive component size, optimizing PCB space.
• 1.2A Output Current: Delivers sufficient power for low-to-medium load applications.
• Cuk Topology: Efficiently inverts voltage with minimal ripple and noise.
• ROHS3 Compliant & REACH Unaffected: Meets environmental and regulatory standards.
• Last Time Buy Status: Available for final designs but not recommended for new projects.

LM2611AMF Applications

The LM2611AMF excels in systems requiring negative voltage generation, such as:

• LCD Bias Supplies: For TFT displays in portable electronics.
• Op-Amp Power Rails: Providing dual-polarity supplies in analog circuits.
• Data Acquisition Systems: Where signal conditioning demands negative voltages.
• Industrial Sensors: Isolated or high-precision measurement systems.
• Battery-Powered Devices: Efficiently inverting voltages in handheld instruments.

Conclusion of LM2611AMF

The LM2611AMF is a versatile, high-frequency Cuk regulator tailored for negative voltage conversion with compact footprint and efficiency. While it is in Last Time Buy status, its wide input range, adjustable output, and robust performance make it a reliable choice for legacy designs or specific applications needing precise voltage inversion. Engineers should evaluate alternative TI solutions for future-proof designs but can leverage this IC for optimized space and cost in targeted systems.