LM2698MM-ADJ Equivalent & Substitute Parts

Part Overview

The LM2698MM-ADJ is a Boost and SEPIC Switching Regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for positive or negative adjustable output voltage regulation. This device operates with an input voltage range of 2.2V to 12V and delivers up to 1.35A switch current with a fixed output range of 2.2V to 17.5V. The part is mounted in an 8-TSSOP/8-MSOP surface mount package with a 3.00mm width.

The LM2698MM-ADJ is currently classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Step-Up, Step-Up/Step-Down
Topology	Boost, SEPIC
Output Configuration	Positive or Negative
Output Type	Adjustable
Number of Outputs	1
Voltage - Input (Min)	2.2V
Voltage - Input (Max)	12V
Voltage - Output (Min/Fixed)	2.2V
Voltage - Output (Max)	17.5V
Current - Output	1.35A (Switch)
Frequency - Switching	600kHz, 1.25MHz
Synchronous Rectifier	No
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package	8-VSSOP

Substitute Part Grouping Explanation

Substitution of the LM2698MM-ADJ is determined by strict equivalence across the following critical parameters:

Topology and Function: Boost and SEPIC switching regulator capability with step-up and step-up/step-down functionality
Output Configuration: Positive or negative adjustable output
Electrical Specifications: Input voltage range 2.2V to 12V, output voltage range 2.2V to 17.5V, output current 1.35A (Switch)
Switching Frequency: 600kHz or 1.25MHz operation
Package Compatibility: 8-TSSOP/8-MSOP surface mount package with 3.00mm width
Thermal Performance: Operating temperature range -40°C to 125°C (TJ)

The LM2698MM-ADJ/NOPB is identified as a direct substitute based on identical electrical and mechanical specifications. The primary distinction is product status and compliance certification.

Parameter Comparison

Parameter	LM2698MM-ADJ	LM2698MM-ADJ/NOPB
Manufacturer	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active
Function	Step-Up, Step-Up/Step-Down	Step-Up, Step-Up/Step-Down
Topology	Boost, SEPIC	Boost, SEPIC
Output Configuration	Positive or Negative	Positive or Negative
Output Type	Adjustable	Adjustable
Number of Outputs	1	1
Voltage - Input (Min)	2.2V	2.2V
Voltage - Input (Max)	12V	12V
Voltage - Output (Min/Fixed)	2.2V	2.2V
Voltage - Output (Max)	17.5V	17.5V
Current - Output	1.35A (Switch)	1.35A (Switch)
Frequency - Switching	600kHz, 1.25MHz	600kHz, 1.25MHz
Synchronous Rectifier	No	No
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
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
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

The LM2698MM-ADJ/NOPB is the direct substitute for the obsolete LM2698MM-ADJ. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility.

The LM2698MM-ADJ/NOPB offers the following advantages:

Active Product Status: Currently manufactured and supported by Texas Instruments, ensuring long-term availability and supply chain stability
ROHS3 Compliance: Meets RoHS3 environmental standards, whereas the original part is RoHS non-compliant
Tape & Reel Packaging: Supplied in Tape & Reel format, suitable for automated assembly processes

Both parts maintain identical electrical performance across input voltage range (2.2V to 12V), output voltage range (2.2V to 17.5V), output current (1.35A), switching frequency (600kHz or 1.25MHz), and thermal operating range (-40°C to 125°C).

Frequently Asked Questions (FAQ)

Q: Can the LM2698MM-ADJ/NOPB be used as a direct replacement for the LM2698MM-ADJ?

A: Yes. The LM2698MM-ADJ/NOPB is electrically and mechanically identical to the LM2698MM-ADJ. Both parts feature the same input/output voltage specifications, current rating, switching frequency, package type, and pin configuration. The primary differences are product status (Active vs. Obsolete) and RoHS compliance certification.

Q: What is the difference between the LM2698MM-ADJ and LM2698MM-ADJ/NOPB?

A: The LM2698MM-ADJ/NOPB is the active production variant of the LM2698MM-ADJ. The "/NOPB" suffix indicates Tape & Reel packaging without plating on the leads. The original LM2698MM-ADJ is obsolete and supplied in bulk packaging. The LM2698MM-ADJ/NOPB is ROHS3 compliant, while the original is RoHS non-compliant.

Q: Are there any pin configuration differences between these parts?

A: No. Both the LM2698MM-ADJ and LM2698MM-ADJ/NOPB use the identical 8-TSSOP/8-MSOP package with 3.00mm width. Pin assignments, electrical characteristics, and functional behavior are identical.

Q: What packaging formats are available?

A: The LM2698MM-ADJ is supplied in bulk packaging. The LM2698MM-ADJ/NOPB is supplied in Tape & Reel (TR) format, which is standard for automated assembly operations.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the LM2698MM-ADJ and LM2698MM-ADJ/NOPB operate across the identical temperature range of -40°C to 125°C (TJ).

Q: What is the switching frequency specification for these regulators?

A: Both parts support dual switching frequency operation at 600kHz or 1.25MHz, selectable based on application requirements.

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