LM5576MH Buck Switching Regulator IC

Part Overview

The LM5576MH is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with positive adjustable output. This device delivers 3A output current and operates across a wide input voltage range of 6V to 75V, making it suitable for diverse power management applications.

The LM5576MH carries a Last Time Buy product status, indicating limited availability. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for new projects or production transitions.

Substiute Parts

LM5576MH

Texas InstrumentsIn Stock: 30253LM5576MH Datasheet

Current PartRFQ

LM5576MH/NOPB

Texas InstrumentsIn Stock: 5365LM5576MH/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM5576MH is determined by strict equivalence across the following critical parameters:

• Topology & Function: Buck (step-down) converter with positive adjustable output
• Electrical Specifications: Input voltage range 6V–75V, output voltage 1.225V–70V, 3A output current
• Switching Frequency: 50kHz–500kHz operating range
• Package & Pinout: 20-PowerTSSOP form factor with identical pin configuration
• Environmental & Compliance: Operating temperature -40°C to 125°C, ROHS3 compliance, MSL 1 rating

The LM5576MH/NOPB variant qualifies as a direct manufacturer-recommended substitute, maintaining identical electrical and mechanical specifications while differing only in product status and inventory availability.

Parameter Comparison

Engineering Selection Recommendations

The LM5576MH/NOPB is the direct equivalent substitute for the LM5576MH. Both parts are manufactured by Texas Instruments and share identical electrical performance, thermal characteristics, and package specifications. The primary distinction is product lifecycle status: the LM5576MH is designated Last Time Buy, while the LM5576MH/NOPB maintains Active status with ongoing production and availability.

For new designs or production transitions, the LM5576MH/NOPB is the appropriate selection due to its active product status and sustained supply chain support. Both variants maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the LM5576MH/NOPB be used as a direct replacement for the LM5576MH?

A: Yes. The LM5576MH/NOPB is electrically and mechanically identical to the LM5576MH. Both deliver 3A output current, operate across 6V–75V input range, and use the 20-PowerTSSOP package. The /NOPB suffix indicates lead-free plating and active product status.

Q: What does the Last Time Buy status mean for the LM5576MH?

A: Last Time Buy indicates the manufacturer has announced end-of-life for this part number. Existing inventory may be available, but production has ceased. The LM5576MH/NOPB variant remains in active production.

Q: Are there any package or pinout differences between these parts?

A: No. Both the LM5576MH and LM5576MH/NOPB use the 20-PowerTSSOP package with identical pinout and mechanical dimensions (0.173" width, 4.40mm).

Q: Do both parts meet the same compliance standards?

A: Yes. Both are ROHS3 compliant, carry MSL 1 rating, and are REACH unaffected. They meet identical environmental and regulatory requirements.

Q: Which part should be specified for new designs?

A: The LM5576MH/NOPB should be specified for new designs due to its active product status and assured long-term availability.