LM2623ALD Equivalent & Substitute Parts

Part Overview

The LM2623ALD 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 housed in a 14-WFDFN exposed pad surface mount package with a switching frequency range of 300kHz to 2MHz.

The LM2623ALD is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications currently utilizing this component.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
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	14-WFDFN Exposed Pad
Supplier Device Package	14-WSON (4x4)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the LM2623ALD is determined by strict equivalence across the following critical parameters:

Function and topology (boost step-up converter)
Output configuration (positive adjustable)
Electrical specifications (input voltage range 0.8V–14V, output range 1.24V–14V, 2.2A switch current)
Switching frequency range (300kHz–2MHz)
Package type (14-WFDFN exposed pad, 14-WSON 4x4)
Operating temperature range (-40°C to 85°C)
Absence of synchronous rectifier

The LM2623ALD/NOPB is a direct manufacturer equivalent from Texas Instruments that meets all specified electrical and mechanical parameters. The primary distinction is packaging format and product status.

Parameter Comparison

Parameter	LM2623ALD	LM2623ALD/NOPB
Manufacturer	Texas Instruments	Texas Instruments
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	14-WFDFN Exposed Pad	14-WFDFN Exposed Pad
Supplier Device Package	14-WSON (4x4)	14-WSON (4x4)
Packaging Format	Bulk	Tape & Reel (TR)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

The LM2623ALD/NOPB is the direct equivalent substitute for the obsolete LM2623ALD. Both parts are manufactured by Texas Instruments and share identical electrical specifications and package geometry.

Key selection factors:

The LM2623ALD/NOPB carries Active product status, ensuring continued availability and manufacturer support, whereas the LM2623ALD is obsolete.
The LM2623ALD/NOPB is ROHS3 compliant, meeting current regulatory requirements for new designs and production environments.
The LM2623ALD/NOPB is supplied in Tape & Reel format, standard for automated assembly processes.
Moisture sensitivity differs: LM2623ALD (MSL 1, unlimited shelf life) versus LM2623ALD/NOPB (MSL 3, 168-hour floor life after bag opening). Storage and handling procedures must account for this difference.

For new designs or production transitions, the LM2623ALD/NOPB is the appropriate selection. For legacy applications currently using the LM2623ALD, direct substitution is electrically and mechanically compatible with attention to moisture handling protocols.

Frequently Asked Questions (FAQ)

Q: Are the LM2623ALD and LM2623ALD/NOPB electrically identical?

A: Yes. Both parts deliver identical electrical performance across all specified parameters: input voltage range (0.8V–14V), adjustable output (1.24V–14V), 2.2A switch current, and switching frequency (300kHz–2MHz).

Q: What is the difference between these two part numbers?

A: The primary differences are packaging format (bulk versus Tape & Reel), product status (obsolete versus active), RoHS compliance (non-compliant versus ROHS3 compliant), and moisture sensitivity level (MSL 1 versus MSL 3).

Q: Can I use LM2623ALD/NOPB as a direct replacement in existing designs?

A: Yes, from an electrical and mechanical standpoint. The 14-WFDFN exposed pad package and pin configuration are identical. However, the higher moisture sensitivity level (MSL 3) requires adherence to proper storage and handling procedures to prevent moisture absorption.

Q: Why is the LM2623ALD marked as obsolete?

A: The LM2623ALD has been discontinued by Texas Instruments. The LM2623ALD/NOPB remains in active production and is the recommended part for all new applications.

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

A: No. Both parts operate across the same temperature range (-40°C to 85°C) and deliver identical performance characteristics.

Q: What does the "/NOPB" suffix mean?

A: The "/NOPB" designation indicates the part is supplied without plumbum (lead-free), meeting RoHS3 compliance requirements.

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