LM2694MT Buck Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The LM2694MT is a buck switching regulator IC manufactured by Texas Instruments, designed for positive adjustable output applications. This device functions as a step-down converter with a single adjustable output, capable of delivering 600mA at switching frequencies up to 1MHz. The LM2694MT is classified as obsolete, which necessitates identification of active equivalent parts for new designs and ongoing production requirements. The substitute part maintains identical electrical specifications and mechanical compatibility while offering current product availability and updated compliance certifications.

Substiute Parts

LM2694MT

Texas InstrumentsIn Stock: 2280LM2694MT Datasheet

Current PartRFQ

LM2694MT/NOPB

Texas InstrumentsIn Stock: 1427LM2694MT/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2694MT is determined by strict equivalence across all electrical and mechanical parameters. The primary substitute, LM2694MT/NOPB, is qualified as a direct replacement based on the following criteria:

• Identical functional topology (buck step-down converter)
• Matching output configuration (positive, adjustable, single output)
• Equivalent voltage specifications (8V–30V input, 2.5V–24V output)
• Identical current rating (600mA)
• Matching switching frequency (1MHz)
• Identical package and pinout (14-TSSOP, 0.173" × 4.40mm)
• Identical operating temperature range (-40°C ~ 125°C)
• Same base product number (LM2694)

The LM2694MT/NOPB differs only in product status (active vs. obsolete), packaging format (tube vs. unspecified), and compliance certifications (RoHS3 compliant vs. non-compliant), making it a direct functional and mechanical equivalent.

Parameter Comparison

Engineering Selection Recommendations

The LM2694MT/NOPB is the direct equivalent for the obsolete LM2694MT. Selection of the LM2694MT/NOPB is appropriate for all applications currently using the LM2694MT, as all electrical specifications, output characteristics, and mechanical parameters are identical. The LM2694MT/NOPB offers the additional advantage of active product status, ensuring continued availability and support from Texas Instruments. The LM2694MT/NOPB also meets RoHS3 compliance requirements, which may be necessary for applications subject to environmental regulations. Both parts share the same base product number (LM2694) and are pin-compatible within the 14-TSSOP package.

Frequently Asked Questions (FAQ)

Q: Can the LM2694MT/NOPB be used as a direct replacement for the LM2694MT?

A: Yes. The LM2694MT/NOPB is a direct functional and mechanical equivalent. All electrical specifications, output ratings, switching characteristics, and package dimensions are identical. The parts are pin-compatible and require no circuit modifications.

Q: What is the difference between LM2694MT and LM2694MT/NOPB?

A: The primary differences are product status and compliance certifications. The LM2694MT is obsolete, while the LM2694MT/NOPB is active. The LM2694MT/NOPB is RoHS3 compliant, whereas the LM2694MT is RoHS non-compliant. Packaging format also differs (tube vs. unspecified). All electrical and mechanical specifications remain identical.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the 14-TSSOP package with identical pinout and mechanical dimensions (0.173" × 4.40mm width). Surface mount compatibility is identical.

Q: What is the output voltage range for these regulators?

A: The adjustable output range is 2.5V to 24V. The output voltage is set using external resistor dividers and is not fixed at a single value.

Q: Can these parts operate with input voltages below 8V or above 30V?

A: No. The specified input voltage range is 8V to 30V. Operation outside this range is not supported and may result in device malfunction or damage.

Q: What is the maximum output current rating?

A: The maximum output current is 600mA. Applications requiring higher current output require alternative regulator topologies or multiple devices in parallel configuration.

Q: Are these regulators suitable for high-temperature applications?

A: Both parts operate across the temperature range of -40°C to 125°C (junction temperature). Applications requiring operation outside this range require alternative components.