LM2575T-ADJ/NOPB Equivalent & Substitute Parts

Part Overview

The LM2575T-ADJ/NOPB is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion applications. This positive adjustable output regulator delivers 1A continuous current with an input voltage range of 4V to 40V and adjustable output voltage from 1.23V to 37V. The device operates at a fixed switching frequency of 52kHz and is housed in a TO-220-5 through-hole package. Currently in active production status with 6755 units in stock, this component is widely used in power management applications requiring compact, efficient DC-DC conversion. Substitute parts are identified when equivalent electrical performance and package compatibility can be maintained across the specified parameter ranges.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM2575T-ADJ/NOPB
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Step-Down (Buck)
Output Type	Positive Adjustable
Voltage - Input (Min/Max)	4V to 40V
Voltage - Output (Min/Max)	1.23V to 37V
Current - Output	1A
Frequency - Switching	52kHz
Package / Case	TO-220-5
Operating Temperature	-40°C to 125°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the LM2575T-ADJ/NOPB is determined by strict alignment of the following critical parameters:

Package Compatibility: Both main and substitute parts must use TO-220-5 through-hole packaging to ensure direct PCB mounting compatibility
Functional Equivalence: Step-down buck topology with positive adjustable output configuration
Output Voltage Range: Substitute must support the full 1.23V minimum output voltage and accommodate the required maximum output voltage
Input Voltage Range: Substitute input voltage specifications must encompass or exceed the 4V to 40V operating window
Output Current: Minimum 1A continuous output current capability
Switching Frequency: 52kHz fixed switching frequency for timing-critical applications
Regulatory Compliance: ROHS3 compliance and active product status required

The TL2575HV-ADJIKV meets these substitution criteria with compatible electrical specifications and identical package configuration.

Parameter Comparison

Parameter	LM2575T-ADJ/NOPB	TL2575HV-ADJIKV	Compatibility
Manufacturer	Texas Instruments	Texas Instruments	Same
Function	Step-Down	Step-Down	Equivalent
Output Configuration	Positive Adjustable	Positive Adjustable	Equivalent
Voltage - Input (Min)	4V	4.75V	Substitute higher
Voltage - Input (Max)	40V	60V	Substitute higher
Voltage - Output (Min)	1.23V	1.23V	Equivalent
Voltage - Output (Max)	37V	57V	Substitute higher
Current - Output	1A	1A	Equivalent
Frequency - Switching	52kHz	52kHz	Equivalent
Package / Case	TO-220-5	TO-220-5 Formed Leads	Compatible
Operating Temperature	-40°C to 125°C (TJ)	-40°C to 125°C (TJ)	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

The TL2575HV-ADJIKV qualifies as a direct substitute for the LM2575T-ADJ/NOPB based on the following engineering criteria:

Electrical Compatibility: Both devices maintain identical output current (1A), switching frequency (52kHz), and adjustable output voltage minimum (1.23V). The TL2575HV-ADJIKV provides extended input voltage range (4.75V to 60V versus 4V to 40V) and higher maximum output voltage (57V versus 37V), making it suitable for applications within the original part's specified operating window.

Package Compatibility: Both parts use TO-220-5 through-hole packaging with formed leads, ensuring mechanical and electrical compatibility on existing PCB layouts without design modification.

Regulatory Compliance: Both devices maintain ROHS3 compliance and active product status, meeting current manufacturing and environmental standards.

Thermal Performance: Identical operating temperature range (-40°C to 125°C junction temperature) ensures equivalent thermal behavior in target applications.

The substitute part introduces no functional limitations for applications designed around the LM2575T-ADJ/NOPB specifications.

Frequently Asked Questions (FAQ)

Q: Can the TL2575HV-ADJIKV replace the LM2575T-ADJ/NOPB in existing designs?

A: Yes. Both devices share identical TO-220-5 package configuration, output current rating (1A), switching frequency (52kHz), and adjustable output voltage range (1.23V minimum). The substitute part's extended input voltage range and higher maximum output voltage do not create compatibility issues for circuits designed within the original part's specifications.

Q: What is the difference between the input voltage ranges?

A: The LM2575T-ADJ/NOPB operates from 4V to 40V input, while the TL2575HV-ADJIKV operates from 4.75V to 60V input. For applications requiring operation below 4.75V input, the original part is required. For applications within both ranges, either part is suitable.

Q: Are the output voltage ranges compatible?

A: Both parts support the same minimum adjustable output voltage of 1.23V. The TL2575HV-ADJIKV supports higher maximum output voltage (57V versus 37V). Applications requiring output voltages up to 37V can use either part interchangeably.

Q: Do the formed leads on the TL2575HV-ADJIKV affect PCB compatibility?

A: No. Both parts use TO-220-5 through-hole packaging. Formed leads on the substitute part are a manufacturing variation that does not affect pin spacing, hole diameter, or mounting compatibility on standard PCB layouts.

Q: Are both parts currently available?

A: Yes. Both the LM2575T-ADJ/NOPB and TL2575HV-ADJIKV maintain active product status with current inventory availability.

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