Specifications
| Attribute | Value |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| Series | Automotive, AEC-Q100 |
| ProductStatus | Not For New Designs |
| OutputType | Transistor Driver |
| Function | Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck |
| NumberofOutputs | 1 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 4.5V ~ 35V |
| Frequency-Switching | Up to 1MHz |
| DutyCycle(Max) | 100% |
| SynchronousRectifier | No |
| ClockSync | No |
| ControlFeatures | Current Limit, Enable |
| OperatingTemperature | -40°C ~ 125°C (TJ) |
| MountingType | Surface Mount |
| Package/Case | 8-TSSOP, 8-MSOP (0.118, 3.00mm Width) |
Overview
Description
The LM3489MM is a versatile DC-DC controller produced by Texas Instruments. It is primarily used in applications requiring a step-down (buck) voltage conversion. The device is especially suitable for driving high-current loads efficiently, thanks to its high-side N-channel MOSFET design, which allows for a wide input voltage range of 4.5V to 35V.
Key features of the LM3489MM include a programmable switching frequency, which provides flexibility and optimization for efficiency and size. It also includes a current limit protection, thermal shutdown, and soft-start capabilities to prevent inrush current during power up. The device can achieve up to 90% efficiency, depending on the application and external components used.
The LM3489MM comes in a small, surface-mount, 8-lead MSOP package, making it suitable for compact designs. It is widely used in various applications such as automotive, industrial, and distributed power systems, where efficient power management is crucial. Its robust feature set and reliability make it a popular choice for engineers designing power supply circuits.
Key features of the LM3489MM include a programmable switching frequency, which provides flexibility and optimization for efficiency and size. It also includes a current limit protection, thermal shutdown, and soft-start capabilities to prevent inrush current during power up. The device can achieve up to 90% efficiency, depending on the application and external components used.
The LM3489MM comes in a small, surface-mount, 8-lead MSOP package, making it suitable for compact designs. It is widely used in various applications such as automotive, industrial, and distributed power systems, where efficient power management is crucial. Its robust feature set and reliability make it a popular choice for engineers designing power supply circuits.
Equivalent
The LM3489MM is a high-efficiency step-up DC-DC controller from Texas Instruments. Equivalent products may include:
1. LTC1871 from Analog Devices: A wide-input range, current-mode boost, flyback, and SEPIC controller.
2. MIC3172 from Microchip Technology: A boost converter controller with similar functionality.
3. MAX668 from Maxim Integrated: A step-up DC-DC controller with comparable specifications.
Ensure to check each product’s datasheet to confirm suitability for your specific application.
1. LTC1871 from Analog Devices: A wide-input range, current-mode boost, flyback, and SEPIC controller.
2. MIC3172 from Microchip Technology: A boost converter controller with similar functionality.
3. MAX668 from Maxim Integrated: A step-up DC-DC controller with comparable specifications.
Ensure to check each product’s datasheet to confirm suitability for your specific application.
Features
The LM3489MM is a versatile and efficient step-up DC-DC controller primarily used for power supply applications. Key features include:
1. Wide Input Voltage Range: It supports a broad input voltage range, making it suitable for various applications.
2. High Efficiency: Designed for high-efficiency power conversion, optimizing energy use.
3. Adjustable Output Voltage: Allows for flexible output voltage settings through external resistors to meet specific application needs.
4. Integrated Current Limit: Provides protection against overcurrent conditions, enhancing reliability.
5. Frequency Compensation: Internal frequency compensation simplifies design and ensures stability across various loads.
6. Soft-Start Feature: Smoothly ramps up the output voltage to prevent inrush current, protecting the system components.
7. Low Shutdown Current: Features a low quiescent current in shutdown mode to conserve energy when not in use.
These features make the LM3489MM suitable for applications requiring efficient power conversion and reliable performance across a range of input conditions.
1. Wide Input Voltage Range: It supports a broad input voltage range, making it suitable for various applications.
2. High Efficiency: Designed for high-efficiency power conversion, optimizing energy use.
3. Adjustable Output Voltage: Allows for flexible output voltage settings through external resistors to meet specific application needs.
4. Integrated Current Limit: Provides protection against overcurrent conditions, enhancing reliability.
5. Frequency Compensation: Internal frequency compensation simplifies design and ensures stability across various loads.
6. Soft-Start Feature: Smoothly ramps up the output voltage to prevent inrush current, protecting the system components.
7. Low Shutdown Current: Features a low quiescent current in shutdown mode to conserve energy when not in use.
These features make the LM3489MM suitable for applications requiring efficient power conversion and reliable performance across a range of input conditions.
Pinout
The LM3489MM is a step-down DC-DC controller from Texas Instruments, used to convert higher DC supply voltages to lower DC voltages. It is packaged in an 8-pin MSOP (Mini Small Outline Package). Here is a brief overview of its pin functions:
1. VIN: Input voltage supply for the device.
2. NDRV: Gate drive for the external N-channel MOSFET.
3. FB: Feedback input to set the output voltage through an external resistor divider.
4. COMP: Compensation network connection to stabilize the control loop.
5. EN: Enable pin to turn the device on or off.
6. GND: Ground connection for the device.
7. SS: Soft-start control; connecting a capacitor to this pin controls the startup time.
8. RT/SYNC: Sets the switching frequency through an external resistor or synchronizes to an external clock.
The LM3489MM is designed for applications requiring efficient power conversion and precise voltage regulation, often used in systems like distributed power architectures, battery-powered devices, and other electronic equipment.
1. VIN: Input voltage supply for the device.
2. NDRV: Gate drive for the external N-channel MOSFET.
3. FB: Feedback input to set the output voltage through an external resistor divider.
4. COMP: Compensation network connection to stabilize the control loop.
5. EN: Enable pin to turn the device on or off.
6. GND: Ground connection for the device.
7. SS: Soft-start control; connecting a capacitor to this pin controls the startup time.
8. RT/SYNC: Sets the switching frequency through an external resistor or synchronizes to an external clock.
The LM3489MM is designed for applications requiring efficient power conversion and precise voltage regulation, often used in systems like distributed power architectures, battery-powered devices, and other electronic equipment.
Manufacturer
The LM3489MM is manufactured by Texas Instruments (TI), a global technology company known for its design and production of semiconductors and various integrated circuits. Texas Instruments is a prominent player in the electronics industry, providing solutions that are integral to a wide range of electronic devices and systems. The company specializes in creating analog chips, embedded processors, and other semiconductor components that are used in applications across consumer electronics, automotive, industrial, and communication sectors. Operating worldwide, TI is recognized for its innovation and extensive product portfolio, catering to the needs of engineers and designers in multiple industries.
Application
The LM3489MM is a versatile non-synchronous step-down DC-DC controller commonly used in various applications due to its efficiency and wide input voltage range. Key application areas include power management for industrial and automotive systems, where it helps convert higher battery voltages to lower levels required by electronic components. It's also used in telecommunications for powering routers and modems, as well as in consumer electronics like set-top boxes and LCD monitors. Additionally, it supports LED lighting systems by providing precise current regulation. The LM3489MM is favored for its high efficiency, compact size, and reliability in delivering stable power conversion across diverse electronic applications.
Package
The LM3489MM is a voltage regulator typically housed in an 8-lead Mini Small Outline Package (MSOP). This package type is compact, suitable for surface-mount technology, and provides efficient thermal performance for the device's operation.
