LM3488MMX DC-DC Controller IC Equivalent & Substitute Parts

Part Overview

The LM3488MMX is a Boost, Flyback, and SEPIC Regulator controller IC manufactured by Texas Instruments, designed for positive output step-up and step-up/step-down DC-DC conversion applications. This part is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and ongoing production requirements. The LM3488 series provides a single-output transistor driver topology with integrated enable and frequency control features, operating across a 2.97V to 40V supply voltage range with switching frequencies from 100kHz to 1MHz.

Substiute Parts

LM3488MMX

Texas InstrumentsIn Stock: 7388LM3488MMX Datasheet

Current PartRFQ

LM3488MM

Texas InstrumentsIn Stock: 35127LM3488MM Datasheet

Parametric EquivalentRFQ

LM3488MM/NOPB

Texas InstrumentsIn Stock: 65419LM3488MM/NOPB Datasheet

Parametric EquivalentRFQ

LM3488MMX/NOPB

Texas InstrumentsIn Stock: 22757LM3488MMX/NOPB Datasheet

Parametric EquivalentRFQ

LM3488QMM/NOPB

Texas InstrumentsIn Stock: 20418LM3488QMM/NOPB Datasheet

Parametric EquivalentRFQ

LM3488QMMX/NOPB

Texas InstrumentsIn Stock: 2066LM3488QMMX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM3488MMX is determined by strict equivalence across all electrical and mechanical parameters. The following criteria establish valid substitutes:

Mandatory Matching Parameters:

• Manufacturer: Texas Instruments
• Base Product Number: LM3488
• Function: Step-Up, Step-Up/Step-Down
• Topology: Boost, Flyback, SEPIC
• Output Type: Transistor Driver
• Number of Outputs: 1
• Output Phases: 1
• Voltage - Supply (Vcc/Vdd): 2.97V ~ 40V
• Frequency - Switching: 100kHz ~ 1MHz
• Duty Cycle (Max): 100%
• Clock Sync: Yes
• Control Features: Enable, Frequency Control
• Operating Temperature: -40°C ~ 125°C (TJ)
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Supplier Device Package: 8-VSSOP
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts maintain complete parametric equivalence with the LM3488MMX across these criteria. Differences in product status (active vs. obsolete), packaging format (Cut Tape, Digi-Reel, Tape & Reel), and grade qualification (commercial vs. automotive) do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Commercial Applications: LM3488MM/NOPB is the primary recommended substitute, offering the highest inventory availability (65,400 units) with active product status and ROHS3 compliance. LM3488MMX/NOPB provides an alternative with equivalent specifications and 22,700 units in stock. Both parts are suitable for standard industrial and consumer applications requiring step-up or step-up/step-down DC-DC conversion.

For Automotive Applications: LM3488QMM/NOPB and LM3488QMMX/NOPB are qualified to AEC-Q100 automotive standards and carry automotive-grade designation. These parts are appropriate for automotive power management circuits where grade qualification is a design requirement. LM3488QMM/NOPB offers higher availability (20,400 units) in Cut Tape and Digi-Reel packaging, while LM3488QMMX/NOPB is available in Tape & Reel format with 2,000 units in stock.

Compliance Consideration: All active substitute parts are ROHS3 compliant, whereas the obsolete LM3488MMX is RoHS non-compliant. New designs should specify ROHS3-compliant variants to meet current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can LM3488MM be used as a direct replacement for LM3488MMX? A: Yes. LM3488MM is a parametric equivalent with identical electrical and mechanical specifications. The primary differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Both parts function identically in boost, flyback, and SEPIC topologies.

Q: What is the difference between commercial and automotive grades? A: Automotive-grade parts (LM3488QMM/NOPB, LM3488QMMX/NOPB) are qualified to AEC-Q100 standards and undergo additional testing for reliability in automotive environments. Commercial-grade parts (LM3488MM, LM3488MM/NOPB, LM3488MMX/NOPB) are suitable for industrial and consumer applications. Grade selection depends on application requirements, not electrical performance.

Q: Does the "/NOPB" suffix affect compatibility? A: No. The "/NOPB" designation indicates lead-free plating and does not alter electrical or mechanical compatibility. Parts with and without this suffix are functionally equivalent.

Q: What packaging options are available? A: Substitute parts are available in Cut Tape (CT) & Digi-Reel® format (LM3488MM, LM3488MM/NOPB, LM3488MMX/NOPB, LM3488QMM/NOPB) and Tape & Reel (TR) format (LM3488QMMX/NOPB). All maintain the same 8-VSSOP package footprint and pinout.

Q: Is the LM3488MMX still available for purchase? A: The LM3488MMX is classified as obsolete with 7,300 units in stock. Active alternatives with superior availability are recommended for new designs and production orders.

Q: Can I use an automotive-grade part in a commercial application? A: Yes. Automotive-grade parts exceed commercial specifications and are fully compatible with commercial applications. However, this may result in unnecessary cost. Commercial-grade equivalents are recommended unless automotive qualification is specifically required.