LM3485MMX

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IC REG CTRLR BUCK 8VSSOP

  • FabricanteTexas Instruments

  • Peça do Fabricante #LM3485MMX

  • Pacote VSSOP-8

  • Em Estoque5987

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Especificações

Atributo Valor
Package Tape & Reel (TR)
ProductStatus Obsolete
OutputType Transistor Driver
Function Step-Down
OutputConfiguration Positive
Topology Buck
NumberofOutputs 1
OutputPhases 1
Voltage-Supply(Vcc/Vdd) 4.5V ~ 35V
DutyCycle(Max) 100%
SynchronousRectifier No
ClockSync No
OperatingTemperature -40°C ~ 125°C (TJ)
MountingType Surface Mount
Package/Case 8-TSSOP, 8-MSOP (0.118, 3.00mm Width)

Visão Geral

Description

The LM3485MMX is a high-efficiency step-down (buck) controller designed by Texas Instruments. It is part of the Simple Switcher series, offering flexibility and reliability for power management applications. The device is suitable for use in a wide range of applications due to its capabilities of providing efficient power conversion in compact spaces.
Key features of the LM3485MMX include its ability to handle input voltages ranging from 4.5V to 35V, making it versatile for various systems. It supports a current mode control method which provides fast transient response and simple loop compensation. The device also features a programmable switching frequency, allowing designers to optimize for efficiency or size constraints.
With its integrated N-channel MOSFET driver, the LM3485MMX helps reduce the component count, leading to more compact designs. Protection features include under-voltage lockout, cycle-by-cycle current limit, and thermal shutdown, ensuring robust and reliable operation. The device is commonly used in applications like point-of-load regulation, distributed power systems, and as a general-purpose DC-DC converter.

Equivalent

The LM3485MMX is a step-down DC-DC controller. Equivalent products include the Texas Instruments LM3485 series, and other manufacturers' equivalents like the On Semiconductor MC34063, Microchip's MCP16301, or Analog Devices' ADP2300. However, when selecting an equivalent, ensure matching specifications such as input voltage, output current, and switching frequency. Always consult datasheets for precise compatibility and performance requirements.

Features

The LM3485MMX is a step-down DC-DC converter controller designed for efficient power management in electronic devices. Key features include its ability to operate over a wide input voltage range of 24V to 36V, making it suitable for various applications. It supports adjustable output voltages and offers a high switching frequency of up to 1 MHz, allowing for smaller external components and compact designs.
The LM3485MMX incorporates a voltage-mode control scheme, which provides good transient response and stability. It features an internal error amplifier and allows for pulse frequency modulation (PFM) mode operation to enhance efficiency at light loads. The device includes a soft-start function to limit inrush current during startup, as well as built-in protection mechanisms such as current limit, thermal shutdown, and undervoltage lockout to ensure reliable operation.
Its compact package and efficient performance make the LM3485MMX suitable for various applications, including point-of-load converters, distributed power systems, and other environments where space and efficiency are critical.

Pinout

The LM3485MMX is a voltage-mode, high-efficiency, step-down DC-DC controller produced by Texas Instruments. It is typically used in applications requiring a compact, high-performance power management solution. The LM3485MMX is available in an 8-pin VSSOP (also known as MSOP) package.
Here are the pin functions:
1. VCC: Supply voltage input.
2. PGATE: Gate drive output for the external MOSFET.
3. GND: Ground connection.
4. FB (Feedback): Input for the feedback voltage, used for output voltage regulation.
5. COMP: Compensation pin for the control loop.
6. SHDN (Shutdown): Input to enable or disable the controller.
7. ILIM: Current limit setting input.
8. SW/Bootstrap: Connection for the switching node, used to drive the external MOSFET and provide a bootstrap connection.
The LM3485MMX is designed to drive an external N-channel MOSFET and achieve high efficiency in step-down (buck) converter applications.

Manufacturer

The LM3485MMX is a product manufactured by Texas Instruments. Texas Instruments is a technology company that designs and manufactures semiconductors and various integrated circuits. They are a leading provider of analog and embedded processing chips, serving industries such as automotive, industrial, electronics, and communications. Texas Instruments is known for its innovation in electronic components and its role as a significant player in the semiconductor industry.

Application

The LM3485MMX is a step-down DC-DC controller commonly used in various power management applications. Its primary application areas include:
1. Telecommunications Equipment: For efficient power conversion and regulation in telecom systems.
2. Industrial Systems: Used in automation and control systems for stable power supply.
3. Consumer Electronics: Powers devices like set-top boxes, LCD displays, and other household electronics.
4. Computing Systems: Supports power management in computer peripherals and networking equipment.
5. Automotive Electronics: Provides power regulation for various automotive electronic subsystems.
The device is valued for its high efficiency, flexibility, and reliability across a wide input voltage range.

Package

The LM3485MMX is a DC-DC switching regulator controller packaged in an 8-lead MSOP (Mini Small Outline Package). This package type is compact, suitable for applications requiring efficient space utilization.

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