LM2991SX/NOPB

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The LM2991SX/NOPB is a negative low dropout adjustable voltage regulator manufactured by Texas Instruments. It operates with an input voltage range from -26 V to -3 V and provides an output current of 1 A. The device features a typical dropout voltage of 600 mV and a reference voltage of -1.186 V. It functions within a temperature range of -40 °C to +125 °C. Key electrical parameters include a line regulation of 0.04 %/V, load regulation of 0.4 %, and a quiescent current of 700 µA. The component is housed in a TO-263-5 (D2PAK) surface-mount package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Adjustable negative output voltage capability for flexible system design
• Low dropout performance ensuring efficient regulation under varying load conditions
• Integrated thermal protection and short-circuit current limiting for robust operation

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Negative power supply rails in industrial control systems
• Battery-powered equipment requiring stable negative voltage references
• Communication infrastructure power management modules

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'SX' against the official Texas Instruments datasheet to confirm it denotes the tape-and-reel packaging variant rather than tube packaging. Ensure the order specifies the NOPB designation to guarantee lead-free compliance and RoHS adherence as per manufacturer standards. Cross-reference the full part number with authorized distributors to avoid counterfeit components.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a negative adjustable LDO with 1 A output capacity is required. It is suitable for applications needing tight line and load regulation specifications. Consider the TO-263-5 package for adequate thermal dissipation in space-constrained designs. Verify that the input voltage remains within the specified -26 V to -3 V range during all operating conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The LM2991 series belongs to Texas Instruments' portfolio of negative low dropout regulators. These devices are designed to provide stable negative voltages for analog and digital circuits. The LM2991SX/NOPB specifically represents the surface-mount version of this family, offering reliability and performance for commercial and industrial environments.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Consult the official TI datasheet for direct pin-compatible substitutes within the LM2991 family. Verify that any alternative component matches the -26 V input limit and 1 A output current requirements.