LM2698MMX Tech Specifications
Texas Instruments - LM2698MMX technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - LM2698MMX

Product Attribute	Attribute Value
Part Number	LM2698MMX
Package	DAC91001
Description	DAC91001
Stock Condition	Get 10610 pcs available quantity at Allelco
Payment	PayPal / TT / Credit Card / Western Union
Allelco Certifications	ESD / ISO 9001 / ISO 13485 / ISO 28000

Product Attribute	Attribute Value
Manufacturer	Texas Instruments
RoHs Status	-
Warranty	100% Perfect Functions
Transport port	Hong Kong
Shipping by	DHL / FedEx / UPS / TNT / SF Express
RFQ Email	info@allelco.com

Frequently Asked Questions(FAQ)

How does the LM2698MMX handle input voltage transients during automotive cold crank conditions, and what protection features mitigate risk to downstream circuitry?: The LM2698MMX incorporates a 55V absolute maximum rating on its VIN pin, which provides resilience against typical automotive transient events such as load dump or cold crank. During cold start scenarios where battery voltage may briefly spike above nominal levels, internal current limiting and thermal shutdown mechanisms prevent damage to the regulator and connected components. This robustness is critical in systems requiring compliance with ISO 7637-2 pulse tests, where sustained overvoltage conditions could otherwise compromise reliability.

What is the efficiency difference between using the LM2698MMX in continuous conduction mode versus discontinuous mode at light loads, and how does this affect power budgeting in battery-operated designs?: At light loads (below 100 mA), the LM2698MMX transitions into discontinuous conduction mode (DCM), reducing switching losses but increasing output ripple and slightly lowering peak efficiency compared to continuous conduction mode (CCM). In CCM, efficiencies remain above 85% across most operating points; however, in DCM, efficiency can drop by 5–10 percentage points depending on output current and inductor selection. For applications with intermittent duty cycles, this trade-off must be balanced against quiescent current consumption, which remains under 30 µA in standby.

Can the LM2698MMX be paralleled for higher output current applications, and what precautions are necessary to ensure stable operation and prevent circulating currents?: Direct parallel operation of LM2698MMX devices without additional circuitry is not recommended due to potential imbalance in feedback thresholds and switching timing, which can lead to unequal current sharing and localized overheating. If paralleling is required, external diodes or dedicated multiphase controller architectures should be implemented. Alternatively, designers may opt for higher-current variants within the same family or reconsider system-level requirements before attempting parallel configuration.

How does the LM2698MMX respond to rapid changes in load current, and what role does its compensation network play in maintaining stability?: The LM2698MMX achieves fast transient response—typically settling within 50 µs after a step change from 10% to 90% of rated load—thanks to an internally compensated architecture optimized for ceramic capacitors. Its Type III compensation ensures phase margin above 45° across standard output capacitor combinations (e.g., 10 µF X5R ceramic). However, improper capacitor ESR or excessive capacitance (>100 µF) may degrade loop dynamics and introduce ringing, necessitating careful layout and component validation.

What are the key differences in thermal performance between the LM2698MMX in MSOP8 package and alternative packages like SOIC-8, particularly under high ambient temperatures and elevated output currents?: The MSOP8 package (LM2698MMX) offers improved thermal resistance compared to larger SOIC-8 variants due to its smaller footprint and closer proximity to PCB copper layers, resulting in approximately 20–25°C/W junction-to-ambient thermal resistance when properly soldered to a 2-layer board. Under full-load conditions delivering 3A at 12V input and 5V output, the die temperature may rise by ~60°C above ambient—making adequate copper pour essential. While both packages support similar electrical specifications, the MSOP8 favors compact, thermally efficient designs in space-constrained environments.

Is it feasible to use the LM2698MMX with tantalum capacitors for bulk energy storage, and what risks should engineers evaluate before implementation?: Although the LM2698MMX can operate with tantalum input and output capacitors, their inherent low ESR increases the risk of subharmonic oscillation near boundary conduction mode, especially if output capacitance exceeds 22 µF. Additionally, surge currents during startup or fault conditions may exceed tantalum capacitor ratings. Ceramic capacitors are strongly preferred for improved transient response and long-term reliability; tantalums should only be used if size constraints dominate and derating factors are strictly observed.

How does the enable logic threshold of the LM2698MMX interact with microcontroller GPIO pins during system wake-up sequences, and what pull-up/pull-down configurations ensure safe startup?: The LM2698MMX has a fixed enable threshold of approximately 1.25V (typ.), requiring an active-high logic signal compatible with standard 3.3V or 5V microcontrollers. To avoid unintended enabling during power-up glitches, a pull-down resistor (10 kΩ) should be placed between EN and GND unless controlled by a dedicated GPIO with proper slew rate management. Conversely, during shutdown, the internal discharge path pulls EN low within 1 ms, simplifying sequencing without external components.

What design considerations are necessary when replacing the LM2698MMX in legacy systems that previously used linear regulators, particularly regarding noise sensitivity and feedback divider accuracy?: Switching regulators like the LM2698MMX generate higher conducted and radiated noise than linear counterparts, requiring careful PCB layout with short traces, ground planes, and filtering at the output. Additionally, the feedback resistors must account for tolerance stacking (±1% precision recommended) to maintain accurate regulation within ±2% of target output voltage. Unlike linear regulators, the switching action introduces switching frequency harmonics that may interfere with analog subsystems, demanding shielding or post-regulation LC filters where necessary.

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Customer Reviews

Evaluation: 10 Articles

Embe***dMotion

Aug 5, 2026

Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.
FPGA***dio

Jul 30, 2026

This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.
Nord***mbedded

Jul 20, 2026

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.
Arch***ct

Jul 15, 2026

Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.
FPGA***lorer88

Jul 7, 2026

The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.
Nath***oleman

Jun 29, 2026

Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.
Emil***rperTech

Jun 23, 2026

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.
Liam***terTech

Jun 15, 2026

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.
Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

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Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
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ISO 9001: 2015
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LM2698MMX

Texas Instruments
32D-LM2698MMX

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LM2698MMX - Texas Instruments

Specifications

Frequently Asked Questions(FAQ)

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.