LM3151MH-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LM3151MH-3.3/NOPB is a buck regulator positive output step-down DC-DC controller IC manufactured by Texas Instruments in the SIMPLE SWITCHER® series. This device functions as a transistor driver for step-down topology applications with a single output phase. The part is currently in active product status with 2320 units available in stock.

Finding equivalent and substitute parts becomes necessary when addressing supply chain constraints, inventory availability, or when design requirements permit functional alternatives within the same electrical and mechanical parameter space.

Substiute Parts

LM3151MH-3.3/NOPB

Texas InstrumentsIn Stock: 2366LM3151MH-3.3/NOPB Datasheet

Current PartRFQ

LM3150MH/NOPB

Texas InstrumentsIn Stock: 2190LM3150MH/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM3151MH-3.3/NOPB is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Identical topology (Buck)
• Identical output configuration (Positive)
• Identical output type (Transistor Driver)
• Identical supply voltage range (6V ~ 42V)
• Identical number of outputs and phases (1 output, 1 phase)
• Presence of synchronous rectifier capability
• Compatible operating temperature range (-40°C ~ 125°C)

Mechanical Compatibility Requirements:

• Identical package type (14-PowerTSSOP)
• Identical case dimensions (0.173", 4.40mm Width)
• Surface mount mounting type

Compliance Requirements:

• ROHS3 compliance
• MSL rating of 1 (Unlimited)

The LM3150MH/NOPB qualifies as a parametric equivalent based on these criteria. While the LM3150MH/NOPB offers an extended switching frequency range (up to 1MHz versus 250kHz) and additional control features (Current Limit, On Time Control), these represent functional enhancements rather than deviations from the core parameter set. Both devices share identical supply voltage specifications, package geometry, thermal ratings, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the LM3151MH-3.3/NOPB and LM3150MH/NOPB are active products from Texas Instruments with full ROHS3 compliance and unlimited moisture sensitivity ratings. Selection between these devices should be based on application-specific switching frequency requirements and control feature needs.

The LM3151MH-3.3/NOPB operates at a fixed 250kHz switching frequency with Enable and Soft Start control features. The LM3150MH/NOPB provides programmable switching frequency up to 1MHz with additional Current Limit and On Time Control capabilities. Both devices maintain identical supply voltage ranges, thermal specifications, and package geometries, ensuring mechanical and thermal interchangeability within the 14-PowerTSSOP footprint.

Frequently Asked Questions (FAQ)

Q: Can the LM3150MH/NOPB directly replace the LM3151MH-3.3/NOPB in existing designs?

A: Yes, from a mechanical and thermal standpoint. Both devices use the identical 14-PowerTSSOP package with matching pin assignments and thermal characteristics. However, the LM3150MH/NOPB offers extended switching frequency capability (up to 1MHz) and additional control features. Circuit validation is necessary to confirm functional compatibility with your specific application requirements.

Q: What are the key differences between these two parts?

A: The primary differences are switching frequency range and control features. The LM3151MH-3.3/NOPB operates at 250kHz with Enable and Soft Start control. The LM3150MH/NOPB supports programmable frequency up to 1MHz and includes Current Limit and On Time Control features. Both share identical supply voltage specifications (6V ~ 42V), package type, and thermal ratings.

Q: Are both parts available in the same packaging options?

A: Yes. Both the LM3151MH-3.3/NOPB and LM3150MH/NOPB are supplied in 14-PowerTSSOP surface mount packages with identical case dimensions (0.173", 4.40mm Width). Tube packaging is available for both devices.

Q: Do these parts have the same compliance certifications?

A: Yes. Both devices are ROHS3 compliant with MSL rating of 1 (Unlimited), REACH Unaffected status, and EAR99 ECCN classification. Both are active products from Texas Instruments.

Q: What supply voltage range do these controllers support?

A: Both the LM3151MH-3.3/NOPB and LM3150MH/NOPB support an input supply voltage range of 6V to 42V, making them suitable for automotive and industrial power management applications.