LM2575N-ADJ/NOPB Equivalent & Substitute Parts

Part Overview

The LM2575N-ADJ/NOPB is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for positive adjustable output applications. This part operates as a step-down converter with a 1A output capacity and adjustable output voltage ranging from 1.23V to 37V. The device is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain the core buck regulator functionality while offering active product status and improved availability.

Substiute Parts

LM2575N-ADJ/NOPB

Texas InstrumentsIn Stock: 888LM2575N-ADJ/NOPB Datasheet

Current PartRFQ

LM2575IN

Texas InstrumentsIn Stock: 1404LM2575IN Datasheet

MFR RecommendedRFQ

LM2575T-ADJ/NOPB

Texas InstrumentsIn Stock: 6780LM2575T-ADJ/NOPB Datasheet

MFR RecommendedRFQ

TL2575HV-ADJIN

Texas InstrumentsIn Stock: 1120TL2575HV-ADJIN Datasheet

MFR RecommendedRFQ

TL2575-ADJIN

Texas InstrumentsIn Stock: 1576TL2575-ADJIN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2575N-ADJ/NOPB is determined by the following critical parameters: output voltage range (1.23V to 37V), input voltage range (4V to 40V minimum), output current (1A), switching frequency (52kHz), operating temperature range (-40°C to 125°C), and package type (16-DIP through-hole). All substitute parts maintain these core electrical specifications and are manufactured by Texas Instruments within the LM2575 and TL2575 base product families.

The substitute parts are grouped into two categories based on package configuration: 16-DIP package variants (LM2575IN, TL2575-ADJIN, TL2575HV-ADJIN) and TO-220-5 package variant (LM2575T-ADJ/NOPB). The 16-DIP variants provide direct package compatibility with the original part. The TL2575HV-ADJIN variant extends the maximum input and output voltage specifications to 60V and 57V respectively, offering enhanced capability for higher-voltage applications while maintaining backward compatibility with standard 40V designs.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement in existing 16-DIP through-hole designs, LM2575IN and TL2575-ADJIN are primary substitutes. Both maintain identical electrical specifications within the 4V to 40V input range and 1.23V to 37V output range. LM2575IN carries active product status with higher inventory availability (1302 pcs), while TL2575-ADJIN offers equivalent performance with comparable stock levels (1489 pcs).

The TL2575HV-ADJIN variant extends maximum input voltage to 60V and maximum output voltage to 57V, suitable for applications requiring higher voltage operation. This part maintains 16-DIP package compatibility and active product status, with 1104 pcs in stock.

For applications requiring TO-220-5 package configuration, LM2575T-ADJ/NOPB provides the highest inventory availability (6755 pcs) with active product status. This variant maintains the standard 4V to 40V input and 1.23V to 37V output specifications.

All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Selection should be based on package requirements, voltage specifications, and thermal management considerations specific to the application.

Frequently Asked Questions (FAQ)

Q: Can LM2575IN directly replace LM2575N-ADJ/NOPB in existing designs?

A: LM2575IN is a direct electrical substitute for 16-DIP package applications. Both parts maintain identical output voltage range (1.23V to 37V), output current (1A), and switching frequency (52kHz). The primary difference is product status: LM2575N-ADJ/NOPB is obsolete while LM2575IN is active. Minimum input voltage differs slightly (4.75V vs 4V), which is not significant for most applications.

Q: What is the difference between LM2575IN and TL2575-ADJIN?

A: Both parts are 16-DIP package buck regulators with identical electrical specifications: 1.23V to 37V output, 1A output current, and 52kHz switching frequency. The primary distinction is the base product family: LM2575IN belongs to the LM2575 series, while TL2575-ADJIN belongs to the TL2575 series. Both are active products from Texas Instruments with equivalent performance for standard 40V input applications.

Q: When should TL2575HV-ADJIN be selected instead of other substitutes?

A: TL2575HV-ADJIN is selected for applications requiring input voltages up to 60V or output voltages up to 57V. Standard LM2575 and TL2575 variants are limited to 40V input and 37V output. The HV variant maintains the same 16-DIP package, 1A output current, and 52kHz switching frequency, making it suitable for higher-voltage buck conversion applications.

Q: Is LM2575T-ADJ/NOPB compatible with 16-DIP PCB layouts?

A: No. LM2575T-ADJ/NOPB uses TO-220-5 package configuration, which is not compatible with 16-DIP through-hole PCB layouts. This variant is selected only when TO-220-5 package mounting is required. For 16-DIP compatibility, use LM2575IN, TL2575-ADJIN, or TL2575HV-ADJIN.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All substitute parts listed (LM2575IN, LM2575T-ADJ/NOPB, TL2575-ADJIN, TL2575HV-ADJIN) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the minimum input voltage difference between LM2575N-ADJ/NOPB and LM2575IN?

A: LM2575N-ADJ/NOPB specifies 4V minimum input voltage, while LM2575IN specifies 4.75V minimum input voltage. For applications operating below 4.75V, the original LM2575N-ADJ/NOPB specification must be maintained. For standard applications above 4.75V, LM2575IN is a suitable substitute.