LM3485MM

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LM3485MM

IC REG CTRLR BUCK 8VSSOP

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  • 製造商。 部分 #LM3485MM
  • 8-TSSOP
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規格

Package Tape & Reel (TR),Cut Tape (CT),Bulk
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
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)

概述

Description

The LM3485MM is a high-efficiency, step-down DC-DC regulator from Texas Instruments designed for use in various electronic applications. It belongs to the LM3485 series, noted for its compact size and efficient performance in converting higher DC input voltages to lower DC output voltages. The device operates with a wide input voltage range, typically from 4.5V to 35V, and is capable of delivering output currents up to 1.5A.
Key features of the LM3485MM include its fixed frequency operation, which helps in optimizing the performance and size of the external components, and its internal compensation, reducing the complexity for users. It employs a hysteretic PWM control scheme, known for fast transient response and ease of use. Moreover, the chip includes a shutdown feature, over-current protection, and thermal shutdown, enhancing reliability and safety in various applications.
The LM3485MM is housed in a small MSOP-8 package, making it suitable for space-constrained applications like portable devices, automotive systems, and distributed power systems, where efficiency and size are critical.

Features

The LM3485MM is a simple switcher step-down voltage regulator designed for high-efficiency applications. Key features include:
1. Wide Input Voltage Range: It operates from 4.5V to 35V, suitable for various applications.
2. Adjustable Output Voltage: The output voltage is adjustable via an external resistor divider.
3. High Efficiency: The device is capable of achieving high efficiency, reducing heat generation.
4. Switching Frequency: Operates at a fixed frequency of 260 kHz, optimizing size and performance.
5. Current Limit Protection: Features current limit protection to prevent damage from overloading.
6. Thermal Shutdown: Includes thermal shutdown protection for added reliability.
7. Integrated Power Switch: Incorporates an N-channel MOSFET for efficient power conversion.
8. Low Output Voltage Ripple: Capable of producing low output voltage ripple for stable operation in sensitive applications.
9. Compact Package: Available in a mini small outline package (MSOP-8), saving board space.
10. Soft Start Capability: Provides a controlled start-up to prevent inrush currents.
Overall, the LM3485MM is suitable for applications requiring efficient power conversion with a compact and reliable design.

Package

The LM3485MM is a step-down DC-DC controller from Texas Instruments, typically available in an 8-pin MSOP (Mini Small Outline Package) package type. This package is known for its compact size, making it suitable for space-constrained applications.

Pinout

The LM3485MM is a step-down DC-DC controller from Texas Instruments. It is typically used in power management applications to provide a regulated output voltage from a higher input voltage. The LM3485MM is housed in an 8-pin Mini Small Outline Package (MSOP).
Here are the pin functions:
1. SW (Pin 1): Switch node; connected to the inductor and the diode.
2. GND (Pin 2): Ground reference for the IC.
3. FB (Pin 3): Feedback input; connects to the output voltage through a resistor divider to set the output voltage.
4. COMP (Pin 4): Compensation pin; used for loop compensation to stabilize the control loop.
5. SHDN (Pin 5): Shutdown pin; an active-low input that enables or disables the regulator.
6. VCC (Pin 6): Supply voltage for the IC.
7. BOOT (Pin 7): Bootstrap pin; provides the drive voltage for the high-side N-channel MOSFET.
8. HDRV (Pin 8): High-side drive; drives the gate of the high-side N-channel MOSFET.
The LM3485MM is well-suited for applications that require efficient step-down conversion, such as in telecommunications and networking hardware.

Manufacturer

The LM3485MM is manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company that designs and manufactures a wide variety of integrated circuits and electronic components. TI is known for its innovations in analog and embedded processing products, which are used in a wide range of applications across different industries, including automotive, industrial, consumer electronics, and communications. As a leading player in the semiconductor industry, Texas Instruments focuses on developing technologies that help customers create efficient, reliable, and advanced electronic systems.

Application

The LM3485MM is a step-down DC-DC controller used in various applications that require efficient voltage regulation. It is commonly used in computing power supplies, telecommunications, networking equipment, and industrial power systems. Its ability to handle a wide input voltage range and provide a stable output makes it suitable for point-of-load power regulation in complex electronic systems. Additionally, its compact size and high efficiency are advantageous for portable and space-constrained devices.

Equivalent

The LM3485MM is a constant-current, constant-voltage (CCCV) synchronous buck controller. Equivalent products include controllers with similar specifications, such as the LM3485 variants (e.g., LM3485MTC), TPS40210 from Texas Instruments, and LTC1625 from Analog Devices. Ensure to compare specific features, such as input voltage range, switching frequency, and package type, to verify compatibility. Always consult datasheets and manufacturer resources for precise matching.

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