LM3489MMX.pdf
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The LM3489MMX is a current-mode boost controller optimized for medium-power designs where stability, efficiency and compact implementation are critical. Below is a breakdown of its most important engineering characteristics.
Provides cycle-by-cycle current limiting, simplified loop compensation and improved noise immunity. This makes the LM3489MMX suitable for both boost and non-isolated flyback topologies.
Supports input voltages up to 40 V, making it compatible with automotive 12 V systems, industrial rails and battery-powered equipment.
Features a robust gate driver capable of driving external MOSFETs for improved conversion efficiency and flexible power handling capability.
Switching frequency is set by an external resistor, offering flexibility to optimize the trade-off between efficiency, footprint and EMI performance.
Includes under-voltage lockout (UVLO), cycle-by-cycle current limit, thermal shutdown and soft-start behavior, ensuring safe operation in demanding environments.
Packaged in an 8-pin MSOP, the LM3489MMX enables compact PCB layouts suitable for dense automotive, industrial and LED lighting systems.
| Input Voltage Range | 3 V – 40 V |
|---|---|
| Output Voltage | Determined by external feedback components |
| Switching Frequency | Adjustable up to 1 MHz via external resistor |
| Control Method | Peak current-mode control |
| Driver Capability | Integrated gate driver suitable for external MOSFETs |
| Protection Functions | UVLO, current limiting, thermal shutdown, soft start |
| Package | MSOP-8 (MMX), RoHS compliant |
| Operating Junction Temperature | −40 °C to +125 °C |
The LM3489MMX 8-pin MSOP package includes the following functional pins:
• ISEN – Current sense input
• COMP – Compensation control
• FB – Feedback voltage sense
• GND – Ground reference
• DRV – MOSFET gate driver output
• VCC – Supply input
• EN – Enable / shutdown control
• RT – Frequency-setting resistor input
The device is housed in the compact MSOP-8 package, designed for tight PCB area constraints found in automotive and industrial control systems.
Designers should follow TI's recommended PCB footprint and thermal layout guidelines to ensure reliable soldering and optimal switching performance.
Auxiliary rails, LED drivers, infotainment systems and 12 V pre-regulators operating in noisy automotive environments.
Boost and flyback converters used in sensors, controllers, PLC modules and distributed power architectures.
Bias supplies for transceivers, RF modules and network processors requiring stable and efficient voltage conversion.
Powering displays, lighting modules, embedded SoCs and compact control boards where high efficiency and small size matter.
Alternative boost controllers with comparable functionality include:
• ON Semiconductor NCP3065 / NCP3066
• Microchip MCP16502 family
• Analog Devices LT3757 series
Texas Instruments is a global leader in power-management solutions, offering long-term product availability, detailed documentation and strong engineering support for industrial, automotive and communications applications.
We currently provide peer-to-peer order processing. Submit an RFQ for LM3489MMX, and our professional agent will contact you with competitive global pricing and guide you to complete the order once you accept the offer.
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Pricing and inventory for LM3489MMX fluctuate and are updated periodically (typically within 24 hours). Quotations generally remain valid for 5 days unless otherwise stated.
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We perform Pre-Shipment Inspection (PSI) on randomly selected units before shipping. If there is an issue with LM3489MMX, returns/replacements are accepted when:
Steps: (1) Inform us within 90 days; (2) Obtain Return Authorization (RMA) before sending items back.
Please contact us for technical documents and support related to Texas Instruments LM3489MMX, including pin diagrams and datasheets. Our team will respond promptly.
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