LM3478MM

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LM3478MM

IC REG CTRLR MULT TOP 8VSSOP

  • Fabricante
  • Mfr. Parte #LM3478MM
  • Paquete VSSOP (DGK)-8
  • Hoja de datos
  • En stock5079

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Especificaciones

Package Tape & Reel (TR),Cut Tape (CT),Bulk
ProductStatus Not For New Designs
OutputType Transistor Driver
Function Step-Up, Step-Up/Step-Down
OutputConfiguration Positive
Topology Boost, Flyback, SEPIC
NumberofOutputs 1
OutputPhases 1
Voltage-Supply(Vcc/Vdd) 2.97V ~ 40V
Frequency-Switching 100kHz ~ 1MHz
DutyCycle(Max) 100%
SynchronousRectifier No
ClockSync No
ControlFeatures Enable, Frequency Control
OperatingTemperature -40°C ~ 125°C (TJ)
MountingType Surface Mount
Package/Case 8-TSSOP, 8-MSOP (0.118, 3.00mm Width)

Descripción general

Description

The LM3478MM is a versatile integrated circuit designed by Texas Instruments, primarily used in switching regulator applications to control the power supply. It is part of the LM3478 family and features a high-performance controller that can drive both boost and SEPIC (Single-Ended Primary-Inductor Converter) configurations, making it suitable for various step-up voltage applications.
Key features of the LM3478MM include a wide input voltage range (2.97V to 40V), making it applicable for battery-powered and industrial systems. It operates at a wide temperature range and offers adjustable frequency, providing design flexibility. The device includes important protection features such as current limit, thermal shutdown, and soft start to ensure reliable operation and protection of the circuit components.
The LM3478MM is housed in a compact MSOP-8 package, which aids in saving board space. Its adaptability and robust design make it ideal for applications such as LED drivers, power supply units, and other electronic devices requiring efficient DC-DC voltage conversion.

Features

The LM3478MM is a versatile DC-DC controller manufactured by Texas Instruments. It is designed for use in boost, SEPIC, flyback, and inverting converter topologies. Here are its key features:
1. Wide Input Voltage Range: The LM3478MM can operate with input voltages ranging from 2.97V to 40V, making it suitable for a variety of applications.
2. High Efficiency: It supports high-efficiency power conversion, which is vital for battery-powered devices.
3. Adjustable Output Voltage: The output voltage can be easily set using an external resistor divider.
4. Switching Frequency: It offers a wide range of switching frequencies (up to 1 MHz), which can be adjusted with a single resistor, enabling flexibility in design.
5. Low Shutdown Current: The device features a low shutdown current of 5 µA, conserving energy in power-down mode.
6. Current Mode Control: This feature provides better transient response and loop stability.
7. Integrated Features: Includes features like cycle-by-cycle current limiting and thermal shutdown for robust performance.
8. Package: The LM3478MM is available in a small, thermally efficient VSSOP-8 package, suitable for space-constrained applications.
These features make it ideal for use in automotive, telecom, and industrial applications.

Package

The LM3478MM is a switching regulator controller from Texas Instruments, and it typically comes in an 8-pin VSSOP (very thin shrink small outline package) package type.

Pinout

The LM3478MM is a high-efficiency switching regulator controller commonly used for boost and SEPIC converter applications. The "MM" in the part number indicates that it is in an 8-pin VSSOP (Very Small Shrink Outline Package) package. Here are the pin functions for the LM3478MM:
1. SW (Switch): Connects to the switching node.
2. GND (Ground): Ground reference for the device.
3. FB (Feedback): Feedback input for setting the output voltage.
4. COMP (Compensation): Compensation network connection for stability.
5. UVLO (Under-Voltage Lockout): Sets the undervoltage lockout threshold.
6. PGATE (Power Gate): Drives the gate of the external FET.
7. VIN (Input Voltage): Supply voltage for the controller.
8. ISEN (Current Sense): Current sense input for over-current protection.
These pins work together to control the power conversion process, regulate output voltage, and protect the circuit from conditions such as over-current.

Manufacturer

The LM3478MM is manufactured by Texas Instruments (TI). Texas Instruments is an American technology company that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. TI is well-known for its high-quality analog and embedded processing products and serves various sectors, including industrial, automotive, personal electronics, communications equipment, and enterprise systems.

Application

The LM3478MM is a versatile high-efficiency boost controller used in power supply applications. Key areas include step-up converters, flyback converters, and SEPIC (Single-Ended Primary-Inductor Converter) designs. It is commonly used in industrial and automotive power management, LED drivers, and battery-powered systems requiring voltage boost. Its wide input voltage range and robust features make it suitable for applications needing reliable power conversion and efficiency.

Equivalent

The LM3478MM is a versatile high-efficiency current mode controller for switching regulators. Equivalent or similar products include:
1. LT3758 - Offers similar functionality with wide input range.
2. MC34063 - A classic DC-DC converter IC, although less advanced.
3. TPS40210 - A flexible controller for DC-DC converters.
4. MAX668 - Precision PWM controller with similar features.
Always check the specific requirements and specifications to ensure compatibility.

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