LM3485MM/NOPB

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LM3485MM/NOPB

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IC REG CTRLR BUCK 8VSSOP

  • HerstellerTexas Instruments

  • Herstellerteil #LM3485MM/NOPB

  • Paket VSSOP-8

  • Auf Lager4191

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Spezifikationen

Attribut Wert
Package / Case Tape & Reel (TR),Cut Tape (CT)
Part Status Active
Output Type Transistor Driver
Function Step-Down
Output Configuration Positive
Topology Buck
Number of Outputs 1
Output Phases 1
Voltage - Supply (Vcc/Vdd) 4.5V ~ 35V
Duty Cycle(Max) 100%
Synchronous Rectifier No
Clock Sync No
Operating Temperature -40°C ~ 125°C (TJ)
Mounting Type Surface Mount

Übersicht

Description

The LM3485MM/NOPB is a non-synchronous, buck controller designed by Texas Instruments for applications requiring efficient step-down voltage regulation. It is part of the LM3485 family and is packaged in a surface-mount, Mini Small Outline Package (MSOP-8). The device operates with input voltages ranging from 4.5V to 35V and can provide output voltages as low as 1.23V.
Key features include a high-speed, constant-on-time (COT) PWM control scheme, which enables fast transient response and simplifies loop stability design. It supports a wide range of switching frequencies, allowing for flexibility in design and efficiency optimization. The LM3485MM/NOPB also includes overcurrent protection, adjustable soft-start, and an enable pin for precise control of the power supply sequence.
This controller is suitable for various applications, including point-of-load power supplies, distributed power systems, and general-purpose step-down converters. Its compact size and versatility make it a popular choice for designers needing reliable and efficient voltage regulation solutions.

Equivalent

The LM3485MM/NOPB is a DC-DC buck controller by Texas Instruments. Equivalent products include:
1. Linear Technology LT3470 - A step-down regulator with similar functionality.
2. Maxim Integrated MAX16903 - An automotive DC-DC buck controller.
3. ON Semiconductor NCP3063 - A switching regulator suitable for similar applications.
4. Microchip MCP16301 - A high-efficiency buck regulator.
These alternatives may differ in specifications and performance, so it's essential to check compatibility with your application needs.

Features

The LM3485MM/NOPB is a versatile DC-DC synchronous buck controller, designed for efficient voltage regulation. Key features include:
1. Wide Input Voltage Range: It supports input voltages from 2.97V to 5.5V, making it suitable for various applications.
2. Adjustable Output Voltage: The output voltage can be precisely set using an external resistor divider.
3. High Efficiency: The synchronous rectification ensures high efficiency, ideal for battery-powered devices.
4. Current Mode Architecture: This provides excellent line and load transient response.
5. Adjustable Switching Frequency: The switching frequency can be adjusted, enabling optimization for efficiency or size.
6. Integrated Soft-start: This feature helps in reducing inrush current during startup.
7. Overcurrent Protection: Built-in overcurrent protection ensures component safety and system reliability.
8. Thermal Shutdown: Protects the device from overheating by shutting it down when necessary.
9. Compact Package: Available in a small MSOP-8 package, saving board space.
These features make the LM3485MM/NOPB a robust and efficient choice for power management in a variety of electronic devices.

Pinout

The LM3485MM/NOPB is a DC-DC buck controller with a pin count of 8. This IC is designed to regulate output voltage in power supply applications by controlling an external N-channel MOSFET. Here is a brief overview of its pin functions:
1. VCC: Power supply input for the IC.
2. GND: Ground connection.
3. FB: Feedback input for voltage regulation; connected to the output.
4. COMP: Compensation pin for the error amplifier; used to stabilize the control loop.
5. RCL: Current limit set pin; determines the current limit by setting an appropriate resistor.
6. SW: Switch node connection; connects to the source of the N-channel MOSFET.
7. HGATE: High-side gate drive; controls the gate of the external N-channel MOSFET.
8. SS: Soft-start control; allows the output voltage to ramp up slowly to prevent inrush current.
The LM3485MM/NOPB is typically used in applications requiring efficient power conversion with adjustable output voltage and current limiting features.

Manufacturer

The LM3485MM/NOPB is a product manufactured by Texas Instruments (TI). Texas Instruments is a global semiconductor company that designs and manufactures a range of electronic components for various industries. It is known for its innovation in the fields of analog and embedded processing, producing products that include microcontrollers, digital signal processors, and analog chips among others. TI serves a wide array of markets, including automotive, industrial, personal electronics, communications equipment, and enterprise systems. The company is headquartered in Dallas, Texas, and is recognized for its role in advancing the technology industry through its contributions to integrated circuits and semiconductor technologies.

Application

The LM3485MM/NOPB is a versatile, high-efficiency step-down DC-DC controller ideal for various applications. It is commonly used in power management systems for portable devices, battery-powered equipment, and distributed power systems. This controller is suited for applications requiring efficient voltage regulation, such as point-of-load (POL) converters, telecommunications systems, and consumer electronics. Its ability to handle wide input voltage ranges makes it suitable for automotive and industrial applications. Additionally, the LM3485MM/NOPB is often utilized in LED drivers, networking equipment, and any system where compact, efficient power conversion is critical.

Package

The LM3485MM/NOPB is a step-down DC-DC converter from Texas Instruments, typically housed in an 8-pin MSOP (Mini Small Outline Package). This package type provides a compact form factor for surface mounting on PCBs, making it suitable for space-constrained applications.

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