LM2623MM Equivalent & Substitute Parts

Part Overview

The LM2623MM is a boost switching regulator IC from Texas Instruments designed for step-up voltage conversion applications. It delivers positive adjustable output from 1.24V to 14V with a maximum switch current of 2.2A, operating across an input voltage range of 0.8V to 14V. The device is packaged in an 8-TSSOP/8-MSOP form factor with a 3.00mm width, suitable for surface mount applications in power management circuits.

The LM2623MM is currently listed as obsolete. Identifying qualified substitute parts is essential for design continuity, production planning, and long-term component availability assurance.

Substiute Parts

LM2623MM

Texas InstrumentsIn Stock: 2380LM2623MM Datasheet

Current PartRFQ

LM2623MM/NOPB

National SemiconductorIn Stock: 25234LM2623MM/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2623MM is determined by strict equivalence across the following critical parameters:

• Topology & Function: Boost (step-up) switching regulator topology
• Output Configuration: Single positive adjustable output
• Voltage Specifications: Input range 0.8V to 14V; output adjustable from 1.24V to 14V
• Current Rating: 2.2A switch current
• Switching Frequency: 300kHz to 2MHz operational range
• Package Compatibility: 8-TSSOP/8-MSOP form factor with 3.00mm width
• Thermal Range: -40°C to 85°C operating temperature
• Rectifier Type: Non-synchronous design

Only parts matching all these parameters across electrical performance and mechanical form factor are considered direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The LM2623MM/NOPB from National Semiconductor is a direct functional and mechanical equivalent to the obsolete LM2623MM. Both devices share identical electrical specifications, package geometry, and thermal operating range. The primary distinction is product status: the LM2623MM/NOPB maintains active production status with 25,200 units in current inventory, whereas the original LM2623MM is obsolete with limited stock availability.

Both parts carry identical export classification (EAR99) and tariff codes (HTSUS 8542.39.0001), confirming regulatory equivalence. The LM2623MM/NOPB is the appropriate selection for new designs, production restocking, and long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the LM2623MM/NOPB be used as a direct replacement for the LM2623MM in existing designs?

A: Yes. The LM2623MM/NOPB is electrically and mechanically identical to the LM2623MM across all specified parameters. Pin configuration, package footprint, voltage ratings, current handling, and thermal characteristics are equivalent. No circuit modifications are required.

Q: What is the difference between LM2623MM and LM2623MM/NOPB?

A: The "/NOPB" suffix indicates lead-free (Pb-free) solder plating, compliant with RoHS directives. The electrical and functional specifications remain identical. Both are 8-VSSOP packaged devices with the same performance characteristics.

Q: Are there any package compatibility concerns when substituting these parts?

A: No. Both the LM2623MM and LM2623MM/NOPB use the 8-TSSOP/8-MSOP package with 3.00mm width. PCB footprints, land patterns, and mounting procedures are identical.

Q: What is the switching frequency range for these boost regulators?

A: Both devices operate across a switching frequency range of 300kHz to 2MHz, allowing frequency adjustment based on application requirements and component selection.

Q: Can these devices operate with input voltages below 0.8V or above 14V?

A: No. The specified input voltage range is 0.8V minimum to 14V maximum. Operation outside this range is not supported and may result in device damage or malfunction.

Q: What is the minimum adjustable output voltage for the LM2623MM/NOPB?

A: The minimum output voltage is 1.24V. Output voltage adjustment is achieved through external feedback resistor networks, with the maximum adjustable output reaching 14V.