LM25574MT Equivalent & Substitute Parts

Part Overview

The LM25574MT is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with positive adjustable output. It delivers 500mA output current across an input voltage range of 6V to 42V, with adjustable output from 1.225V to 40V. The device operates at switching frequencies between 50kHz and 1MHz and is housed in a 16-TSSOP surface mount package.

The LM25574MT carries an obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing support and current compliance certifications.

Substiute Parts

LM25574MT

Texas InstrumentsIn Stock: 4950LM25574MT Datasheet

Current PartRFQ

LM25574MT/NOPB

Texas InstrumentsIn Stock: 120114LM25574MT/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM25574MT is determined by strict equivalence across the following critical parameters:

• Topology & Function: Buck (step-down) switching regulator with positive adjustable output
• Electrical Specifications: Input voltage range 6V–42V, output range 1.225V–40V, 500mA output current capacity
• Switching Frequency: 50kHz to 1MHz operational range
• Package & Pinout: 16-TSSOP surface mount package with identical pin configuration
• Operating Temperature Range: -40°C to 125°C junction temperature
• Synchronous Rectifier Configuration: Non-synchronous design

The LM25574MT/NOPB qualifies as a direct substitute based on identical electrical performance, package specification, and pinout compatibility. The primary distinction is product status and compliance certification level.

Parameter Comparison

Engineering Selection Recommendations

The LM25574MT/NOPB is the direct substitute for the obsolete LM25574MT. Both devices share identical electrical specifications, package configuration, and pinout, ensuring drop-in compatibility at the circuit board level.

The LM25574MT/NOPB carries active product status with ROHS3 compliance certification, whereas the original LM25574MT is obsolete and RoHS non-compliant. For new designs or production transitions, the LM25574MT/NOPB is the appropriate selection. Both devices maintain REACH Unaffected status and identical export classification (EAR99).

Frequently Asked Questions (FAQ)

Q: Can the LM25574MT/NOPB be used as a direct replacement for the LM25574MT?

A: Yes. The LM25574MT/NOPB is electrically and mechanically identical to the LM25574MT. Both devices feature the same input/output voltage ranges, 500mA output current, switching frequency range, operating temperature, and 16-TSSOP package. Pin-for-pin compatibility is confirmed.

Q: What is the difference between LM25574MT and LM25574MT/NOPB?

A: The primary differences are product status and RoHS compliance. The LM25574MT is obsolete and RoHS non-compliant. The LM25574MT/NOPB is active production and ROHS3 compliant. Electrical and package specifications are identical.

Q: Is the 16-TSSOP package the same for both parts?

A: Yes. Both the LM25574MT and LM25574MT/NOPB use the 16-TSSOP (0.173", 4.40mm Width) surface mount package with identical pinout and footprint.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by matching topology (buck converter), output configuration (positive adjustable), voltage ranges (6V–42V input, 1.225V–40V output), output current (500mA), switching frequency (50kHz–1MHz), operating temperature (-40°C to 125°C), and package type (16-TSSOP).

Q: Are there any compliance differences between the two parts?

A: The LM25574MT/NOPB is ROHS3 compliant, while the LM25574MT is RoHS non-compliant. Both maintain REACH Unaffected status and EAR99 export classification. For applications requiring RoHS compliance, the LM25574MT/NOPB is the required selection.