LM3671MF-3.3

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LM3671MF-3.3

IC REG BUCK 3.3V 600MA SOT23-5

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規格

Part Status Obsolete
Base Product Number LM3671
Function Step-Down
Output Configuration Positive
Topology Buck
Output Type Fixed
Number of Outputs 1
Voltage - Input (Min) 2.7V
Voltage - Input (Max) 5.5V
Voltage - Output (Min/Fixed) 3.3V
Current - Output 600mA
Frequency - Switching 2MHz
Synchronous Rectifier Yes
Operating Temperature -40°C ~ 85°C (TA)
Mounting Type Surface Mount
Package SC-74A, SOT-753
Supplier Device Package SOT-23-5
Packaging Tape & Reel (TR)

概述

Description

The LM3671MF-3.3 is a high-efficiency, step-down DC-DC converter designed by Texas Instruments. It provides a fixed output voltage of 3.3V from a wider input voltage range of 2.7V to 5.5V, making it suitable for battery-powered applications and devices requiring efficient power management. The device is capable of delivering up to 600mA of load current while maintaining high efficiency due to its low quiescent current and low RDS(on) switches.
The LM3671MF-3.3 operates in a pulse-width modulation (PWM) mode for moderate to heavy loads and automatically switches to a power-saving mode at lighter loads to conserve energy, which is essential for battery-operated devices. It features internal compensation, enabling stable operation across its load range without the need for additional external components.
Key characteristics include a fast transient response, low output voltage ripple, and internal soft-start to limit inrush current during startup. The device is housed in a small, thermally efficient SOT-23-5 package, making it ideal for space-constrained applications such as mobile phones, portable media players, and other handheld devices.

Features

The LM3671MF-3.3 is a step-down DC-DC converter from Texas Instruments designed for portable and battery-powered applications. Key features include:
1. Output Voltage: Fixed at 3.3V.
2. Input Voltage Range: Supports from 2.7V to 5.5V, suitable for single Li-Ion battery cells.
3. Efficiency: High efficiency up to 95%, optimal for power-sensitive applications.
4. Output Current: Capable of delivering up to 600mA continuous load current.
5. Switching Frequency: Operates at a fixed frequency of 2 MHz, allowing the use of small external components.
6. Low Quiescent Current: Very low quiescent current, enhancing battery life in portable applications.
7. Enable Pin: Includes an enable pin for power-saving and control.
8. Compact Package: Available in a small, 6-pin SOT-23 package, making it suitable for space-constrained designs.
9. Protection Features: Includes over-current protection, thermal shutdown, and short circuit protection for reliability.
These features make the LM3671MF-3.3 ideal for mobile phones, PDAs, and other portable electronics that require efficient power regulation.

Package

The LM3671MF-3.3 is a step-down voltage regulator from Texas Instruments, and it is typically available in a small form-factor SOT-23 (Small Outline Transistor) package, specifically the 6-pin SOT-23 package. This makes it suitable for compact electronic designs requiring efficient power management.

Pinout

The LM3671MF-3.3 is a step-down DC-DC converter with a fixed output voltage of 3.3V. It is housed in an 8-pin MSOP (Mini Small Outline Package). Here is a brief overview of its pin functions:
1. Vin: Input voltage supply pin.
2. GND: Ground pin.
3. SW: Switch node, connected to the inductor.
4. FB: Feedback pin (for adjustable versions, not connected in fixed output versions like 3.3V).
5. EN: Enable pin, used to enable or disable the device.
6. NC: No connection.
7. NC: No connection.
8. Vout: Output voltage pin.
The LM3671MF-3.3 is designed for portable applications where efficiency and minimal external components are critical. It provides features like low output voltage ripple, low quiescent current, and high efficiency across a wide load range.

Manufacturer

The LM3671MF-3.3 is manufactured by Texas Instruments Incorporated. Texas Instruments, commonly known as TI, is an American technology company headquartered in Dallas, Texas. It is a global leader in the design and manufacture of semiconductors and integrated circuits, which are used in a wide range of electronic devices. TI's products are used in industries such as automotive, industrial, personal electronics, communications equipment, and enterprise systems. The company is well-known for its innovation in analog and embedded processing technologies, which are core components in modern electronic systems.

Application

The LM3671MF-3.3 is a step-down DC-DC converter commonly used in battery-powered devices. Its primary application areas include smartphones, tablets, portable media players, digital cameras, and other handheld electronics. The converter is also used in embedded systems and IoT devices for efficient power management. It offers a fixed 3.3V output, making it suitable for powering microcontrollers, sensors, and other low-voltage components.

Equivalent

The LM3671MF-3.3 is a step-down DC-DC converter. Equivalent alternatives include the TPS62230 from Texas Instruments, the MIC5219-3.3YM5 from Microchip Technology, and the XC6206P332MR-G from Torex Semiconductor. These alternatives offer similar voltage regulation capabilities, but always verify the specifications and pin configurations before substitution to ensure compatibility with your design.

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