LM2623AMM Equivalent & Substitute Parts

Part Overview

The LM2623AMM is a boost switching regulator IC manufactured by Texas Instruments, designed for step-up voltage conversion applications. This positive adjustable output device delivers 2.2A switch current with an input voltage range of 0.8V to 14V and adjustable output from 1.24V to 14V. The device operates at switching frequencies between 300kHz and 2MHz, making it suitable for compact power management designs requiring minimal external component count.

The LM2623AMM carries a Last Time Buy status, indicating that Texas Instruments has discontinued this product line. This necessitates identification of functionally equivalent alternatives to maintain design continuity and ensure long-term supply chain reliability for applications currently utilizing this component.

Key Parameters

Parameter	Value
Function	Step-Up (Boost)
Output Configuration	Positive
Output Type	Adjustable
Number of Outputs	1
Voltage - Input (Min)	0.8V
Voltage - Input (Max)	14V
Voltage - Output (Min/Fixed)	1.24V
Voltage - Output (Max)	14V
Current - Output	2.2A (Switch)
Frequency - Switching	300kHz ~ 2MHz
Synchronous Rectifier	No
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package	8-VSSOP
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM2623AMM is determined by strict equivalence across the following critical parameters:

Functional Requirements:

Topology: Boost (step-up) switching regulator
Output Configuration: Positive adjustable
Number of Outputs: Single output

Electrical Specifications:

Input voltage range: 0.8V to 14V minimum compatibility
Output voltage range: 1.24V to 14V minimum compatibility
Output current capability: 2.2A switch current minimum
Switching frequency: 300kHz to 2MHz operation range

Physical & Environmental Constraints:

Package type: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) or 8-VSSOP
Operating temperature: -40°C to 85°C minimum
Surface mount configuration

Regulatory & Compliance:

RoHS3 compliance
MSL rating of 1 or better

Parts meeting all these criteria are classified as direct functional equivalents and may be substituted without circuit redesign.

Parameter Comparison

Parameter	LM2623AMM (Main)	LM2623AMM/NOPB (Substitute)
Manufacturer	Texas Instruments	National Semiconductor
Product Status	Last Time Buy	Active
Function	Step-Up	Step-Up
Output Configuration	Positive	Positive
Output Type	Adjustable	Adjustable
Number of Outputs	1	1
Voltage - Input (Min)	0.8V	0.8V
Voltage - Input (Max)	14V	14V
Voltage - Output (Min/Fixed)	1.24V	1.24V
Voltage - Output (Max)	14V	14V
Current - Output	2.2A (Switch)	2.2A (Switch)
Frequency - Switching	300kHz ~ 2MHz	300kHz ~ 2MHz
Synchronous Rectifier	No	No
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package	8-VSSOP	8-VSSOP
Base Product Number	LM2623	LM2623
ECCN	EAR99	EAR99
HTSUS	8542.39.0001	8542.39.0001

Engineering Selection Recommendations

The LM2623AMM/NOPB is a direct functional equivalent to the LM2623AMM. Both devices share identical electrical specifications, package configurations, and operating parameters. The primary distinction is product status: the original LM2623AMM is designated Last Time Buy by Texas Instruments, while the LM2623AMM/NOPB maintains Active status with National Semiconductor.

For new designs or production continuity, the LM2623AMM/NOPB is the appropriate selection. Both parts comply with ROHS3 requirements and carry identical export classifications (EAR99). The substitute part maintains the same MSL rating of 1, indicating no moisture sensitivity constraints during storage or handling.

No circuit modifications, PCB layout changes, or firmware adjustments are required when transitioning from LM2623AMM to LM2623AMM/NOPB. Pin configuration, electrical performance, and thermal characteristics remain identical across both variants.

Frequently Asked Questions (FAQ)

Q: Can LM2623AMM/NOPB be used as a direct replacement for LM2623AMM?

A: Yes. Both parts are functionally identical across all specified electrical and mechanical parameters. No circuit redesign is necessary.

Q: Why does the LM2623AMM have Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments has discontinued this product line. Existing inventory may be available through authorized distributors, but long-term supply cannot be guaranteed. Migration to the LM2623AMM/NOPB is recommended for sustained production.

Q: Are the package dimensions identical between both parts?

A: Yes. Both the LM2623AMM and LM2623AMM/NOPB use the 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) package with 8-VSSOP supplier device package designation. PCB footprints are interchangeable.

Q: What is the significance of the /NOPB suffix?

A: The /NOPB suffix indicates "No Plumbum" (lead-free) packaging, confirming RoHS3 compliance. This designation is standard for modern semiconductor components and does not affect electrical performance or compatibility.

Q: Are there any thermal or performance differences between the two parts?

A: No. Both parts operate across the identical temperature range (-40°C to 85°C) and deliver the same switching frequency range (300kHz to 2MHz) and output current capability (2.2A).

Q: Can inventory of LM2623AMM be used interchangeably with LM2623AMM/NOPB in production?

A: Yes. From an engineering standpoint, both parts are functionally equivalent and may be used interchangeably without affecting circuit performance or reliability.

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