LM2595T-3.3 Equivalent & Substitute Parts

Part Overview

The LM2595T-3.3 is a buck switching regulator IC from Texas Instruments, part of the SIMPLE SWITCHER® series. It delivers a fixed 3.3V output at 1A from input voltages ranging from 4.5V to 40V, operating at 150kHz switching frequency in a TO-220-5 through-hole package. The device is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. Substitute parts must maintain compatibility across input voltage range, output voltage specification, output current capability, and package form factor while meeting modern compliance standards.

Substiute Parts

LM2595T-3.3

Texas InstrumentsIn Stock: 875LM2595T-3.3 Datasheet

Current PartRFQ

LM2595T-3.3/NOPB

Texas InstrumentsIn Stock: 957LM2595T-3.3/NOPB Datasheet

DirectRFQ

LM2576T-3.3G

onsemiIn Stock: 3270LM2576T-3.3G Datasheet

MFR RecommendedRFQ

LM2595TADJG

onsemiIn Stock: 1121LM2595TADJG Datasheet

MFR RecommendedRFQ

MIC4576-3.3WT

Microchip TechnologyIn Stock: 3727MIC4576-3.3WT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2595T-3.3 is determined by the following critical parameters: fixed 3.3V output voltage, positive output configuration, buck topology, TO-220-5 package, and through-hole mounting. Substitute parts are grouped into two categories based on output current capability and product status.

Direct Equivalent (Same Output Current - 1A):

• LM2595T-3.3/NOPB: Identical electrical specifications with active product status and RoHS3 compliance

Functional Equivalents (Higher Output Current - 3A):

• LM2576T-3.3G (onsemi): 3A output current, 52kHz switching frequency, 7V minimum input voltage
• MIC4576-3.3WT (Microchip Technology): 3A output current, 200kHz switching frequency, 4V minimum input voltage

Multi-Function Alternative (Adjustable Output):

• LM2595TADJG (onsemi): Adjustable output voltage (1.23V to 37V), 1A output current, supports buck/boost/buck-boost topologies

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Choice): LM2595T-3.3/NOPB is the preferred substitute. It maintains identical electrical specifications and package form factor while offering active product status and RoHS3 compliance. This part provides the most straightforward design migration path with no circuit modifications required.

For Higher Current Applications: LM2576T-3.3G and MIC4576-3.3WT both provide 3A output current capability. LM2576T-3.3G requires minimum 7V input voltage, while MIC4576-3.3WT operates from 4V minimum input, making it suitable for lower input voltage applications. MIC4576-3.3WT is active and RoHS3 compliant. Both require thermal management considerations due to increased current handling.

For Adjustable Output Designs: LM2595TADJG enables multi-topology operation (buck, boost, buck-boost) with adjustable output voltage. This part is suitable only when output voltage adjustment is required and circuit topology flexibility is beneficial. It maintains 1A output current and 150kHz switching frequency matching the original part.

Compliance Considerations: All substitute parts except the original LM2595T-3.3 are RoHS3 compliant. For new designs and production, LM2595T-3.3/NOPB or MIC4576-3.3WT are recommended to ensure regulatory compliance and long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can LM2576T-3.3G replace LM2595T-3.3 in existing designs? A: LM2576T-3.3G is electrically compatible for fixed 3.3V output applications. However, it requires minimum 7V input voltage compared to 4.5V for the original part. Verify your input voltage range before substitution. The 52kHz switching frequency differs from the original 150kHz, which may affect filter component selection and EMI characteristics.

Q: Is LM2595T-3.3/NOPB a direct drop-in replacement? A: Yes. LM2595T-3.3/NOPB maintains identical electrical specifications, output voltage, output current, input voltage range, switching frequency, and TO-220-5 package. No circuit modifications are required. The primary difference is active product status and RoHS3 compliance.

Q: When should I use MIC4576-3.3WT instead of LM2595T-3.3/NOPB? A: Use MIC4576-3.3WT when your application requires higher output current (3A vs 1A) or when operating from input voltages below 4.5V (minimum 4V for MIC4576). MIC4576-3.3WT is active and RoHS3 compliant. Note the operating temperature range is -40°C to 85°C (TA) versus -40°C to 125°C (TJ) for the original part.

Q: What are the package differences between substitute parts? A: All substitute parts use TO-220-5 through-hole packages. LM2595T-3.3/NOPB specifies "TO-220-5 Formed Leads" matching the original part exactly. LM2576T-3.3G, LM2595TADJG, and MIC4576-3.3WT use standard TO-220-5 packages. Pin configurations are compatible across all parts for the specified functions.

Q: Can LM2595TADJG replace LM2595T-3.3 in a fixed 3.3V application? A: LM2595TADJG can be configured for fixed 3.3V output through external resistor networks, but this requires additional design effort and component selection. Use LM2595T-3.3/NOPB for fixed 3.3V applications. LM2595TADJG is appropriate only when adjustable output voltage or multi-topology capability is required.

Q: Are there inventory considerations for these substitutes? A: LM2595T-3.3/NOPB (907 pcs), MIC4576-3.3WT (3653 pcs), and LM2576T-3.3G (3200 pcs) show available inventory. LM2595TADJG (1068 pcs) is also in stock. Verify current availability with your supplier before design commitment.