LM2575-12BN Buck Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The LM2575-12BN is a buck switching regulator IC manufactured by Microchip Technology, designed for positive fixed 12V output applications with 1A current capacity. This device operates across a 4V to 40V input range with a 52kHz switching frequency and is housed in a 16-DIP (0.300", 7.62mm) through-hole package.

The LM2575-12BN is classified as obsolete. Equivalent and substitute parts are necessary to ensure design continuity, maintain supply chain reliability, and access components with active product status and current compliance certifications.

Substiute Parts

LM2575-12BN

Microchip TechnologyIn Stock: 934LM2575-12BN Datasheet

Current PartRFQ

LM2575-12YN

Microchip TechnologyIn Stock: 2240LM2575-12YN Datasheet

DirectRFQ

TL2575-12IN

Texas InstrumentsIn Stock: 1455TL2575-12IN Datasheet

MFR RecommendedRFQ

TL2575HV-12IN

Texas InstrumentsIn Stock: 1318TL2575HV-12IN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2575-12BN is determined by the following criteria:

• Output Voltage: Fixed 12V output (non-negotiable)
• Output Current: 1A minimum rating
• Topology: Buck switching regulator
• Package: 16-DIP (0.300", 7.62mm) through-hole configuration
• Switching Frequency: 52kHz
• Operating Temperature Range: -40°C ~ 125°C (TJ)
• Input Voltage Range: Minimum 4V; maximum 40V or higher

Substitute parts must satisfy all electrical and mechanical parameters listed above. Parts are grouped by manufacturer and product status to facilitate selection based on availability and compliance requirements.

Parameter Comparison

Engineering Selection Recommendations

LM2575-12YN (Microchip Technology)

This part is a direct Microchip equivalent with active product status. It maintains identical electrical specifications and package configuration as the LM2575-12BN. The LM2575-12YN is ROHS3 compliant, addressing regulatory requirements where the original part does not. This option is suitable for designs requiring continuity within the Microchip LM2575 family.

TL2575-12IN (Texas Instruments)

This part is a manufacturer-recommended substitute from Texas Instruments with active product status. It meets all core electrical and mechanical requirements. The minimum input voltage is specified at 4.75V (compared to 4V for the LM2575-12BN), which is compatible with most applications. The TL2575-12IN is ROHS3 compliant and represents a cross-manufacturer alternative with established supply availability.

TL2575HV-12IN (Texas Instruments)

This part is a manufacturer-recommended substitute from Texas Instruments with extended input voltage range (4.75V to 60V maximum). It is suitable for applications requiring higher input voltage tolerance. The TL2575HV-12IN is ROHS3 compliant and offers the same core functionality as the LM2575-12BN with enhanced voltage headroom capability.

Frequently Asked Questions (FAQ)

Q: Can the LM2575-12YN be used as a direct replacement for the LM2575-12BN?

A: Yes. The LM2575-12YN is electrically and mechanically identical to the LM2575-12BN. Both parts share the same output voltage (12V), output current (1A), input voltage range (4V to 40V), switching frequency (52kHz), operating temperature range (-40°C to 125°C), and 16-DIP package configuration. The primary difference is product status (active vs. obsolete) and RoHS compliance.

Q: What is the difference between TL2575-12IN and TL2575HV-12IN?

A: Both parts are Texas Instruments equivalents with identical core specifications. The key difference is the maximum input voltage rating: TL2575-12IN supports up to 40V, while TL2575HV-12IN supports up to 60V. Selection depends on the application's input voltage requirements.

Q: Are there package compatibility considerations when substituting these parts?

A: All substitute parts use the same 16-DIP (0.300", 7.62mm) through-hole package. Pin-to-pin compatibility is maintained across all listed substitutes, allowing direct board-level replacement without layout modifications.

Q: Does the minimum input voltage difference (4V vs. 4.75V) affect compatibility?

A: The Texas Instruments parts (TL2575-12IN and TL2575HV-12IN) specify a minimum input voltage of 4.75V, compared to 4V for the Microchip parts. If your application operates below 4.75V input, the Microchip LM2575-12YN is required. For applications with input voltages at or above 4.75V, both manufacturers' parts are suitable.

Q: What is the significance of RoHS compliance in selecting a substitute?

A: RoHS3 compliance is a regulatory requirement in many markets. The LM2575-12BN is RoHS non-compliant, while all listed substitutes (LM2575-12YN, TL2575-12IN, TL2575HV-12IN) are ROHS3 compliant. New designs should prioritize RoHS-compliant parts to meet current environmental and regulatory standards.