SHENZHEN GANGXINLI ELECTRONICS CO.,LTD
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SHENZHEN GANGXINLI ELECTRONICS CO.,LTD
Professional Electronic Component Distributor!
2026/4/9
The LM3489MMX-NOPB is a high-efficiency buck DC DC switching controller produced by Texas Instruments, belonging to the Power Management IC (PMIC) category, designed for stable step-down voltage conversion in various electronic devices.
Category:Integrated Circuits (ICs),Power Management (PMIC),DC DC Switching Controllers
Manufacturer:Texas Instruments
Packaging:Tape & Reel
Part Status:Active
Output Type:Transistor Driver
Function:Step-Down
Output Configuration:Positive
Topology:Buck
Voltage - Supply (Vcc/Vdd):4.5V ~ 35V
Frequency - Switching:Up to 1MHz
Duty Cycle (Max):100%
Control Features:Current Limit, Enable
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
Wide Input Voltage:Features a 4.5V ~ 35V supply voltage range, adapting to various power supply scenarios and ensuring stable operation under fluctuating input voltages.
High Switching Frequency:Supports switching frequency up to 1MHz, enabling compact circuit design with smaller external components and faster voltage regulation response.
100% Duty Cycle:Allows 100% maximum duty cycle, realizing ultra-low dropout operation and meeting the demand for stable output in low-input-voltage scenarios.
Multiple Protections:Equipped with current limit and enable control features, effectively preventing overcurrent damage and facilitating flexible on/off control of the device.
Compact Packaging:Adopts 8-VSSOP, 8-TSSOP and 8-MSOP surface-mount packages, saving PCB space and fitting miniaturized electronic products.
High Efficiency:Adopts hysteretic PFET buck architecture, achieving high conversion efficiency (up to 93%) and low power consumption, especially suitable for energy-saving devices.
Automotive Infotainment:Applied in car central control systems to convert 12V vehicle power to stable low voltage for the operation of navigation screens and audio modules.
Industrial Control Panels:Used in 10-inch industrial touch control panels to provide stable step-down power supply for microcontrollers and display modules.
Portable Medical Devices:Integrated in portable blood pressure monitors to convert battery voltage (7.4V) to 3.3V for sensor and display unit operation.
LED Drivers:Used in high-power LED street light drivers to step down 24V AC-DC converted voltage to 12V for stable LED lighting operation.
Network Modems:Applied in DSL or cable modems to provide stable power conversion, ensuring reliable data transmission and module operation.
Portable Electronics:Used in handheld barcode scanners to convert 5V USB power to 3.3V, powering the scanner’s core chip and laser module.
The LM3489MMX-NOPB is a high-performance, reliable buck DC DC switching controller with excellent voltage regulation, multiple protections and compact design. It is a cost-effective power management solution for automotive, industrial, medical and consumer electronic devices, ensuring stable and efficient power supply.