LM3881MM

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LM3881MM

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ANALOG CIRCUIT, 1 FUNC, PDSO8

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Thông số kỹ thuật

thuộc tính Giá trị
Package Bulk
ProductStatus Active
Applications Power Supply Sequencer
Voltage-Supply 2.7V ~ 5.5V
Current-Supply 80 µA
OperatingTemperature -40°C ~ 125°C (TJ)
MountingType Surface Mount
Package/Case 8-TSSOP, 8-MSOP (0.118, 3.00mm Width)

Tổng quan

Description

The LM3881MM is a simple power sequencer designed for power management in electronic systems. It is manufactured by Texas Instruments and typically comes in a small-outline surface-mount, 8-pin VSSOP (MM) package. The primary function of the LM3881 is to enable or disable power to various system components in a controlled, sequential manner, ensuring that power is applied or removed in the correct order to prevent damage or ensure proper operation.
Key features of the LM3881 include:
1. Sequence Control: It provides a three-output sequence control, enabling designers to define the order and timing for power-up and power-down sequences.
2. Low Supply Current: The device operates with a low quiescent current, making it suitable for battery-powered applications.
3. Wide Supply Voltage Range: It supports a broad input voltage range, enhancing its versatility across various applications.
4. Adjustable Delay: The timing for each output can be adjusted using external capacitors, allowing for flexible sequencing tailored to specific system requirements.
Overall, the LM3881MM is ideal for applications requiring reliable power sequencing, such as telecommunications, networking, and computer systems.

Equivalent

The LM3881MM is a simple power supply sequencer. Some equivalent or alternative products with similar functionality include the TPS22969 from Texas Instruments, the LTC2921 from Analog Devices, and the MAX16054 from Maxim Integrated. These components offer comparable features such as power sequencing, enable control, and are often used in similar applications where power management is required. Always check the datasheet for specific features and pin compatibility when considering alternatives.

Features

The LM3881MM is a simple power supply sequencer IC designed to manage the power-up and power-down sequencing of multiple voltage rails in electronic systems. Key features include:
1. Sequencing Capability: It can sequence up to three different voltage rails, ensuring that they power up and down in a specific order, which is critical for many multi-voltage systems.
2. Input Voltage Range: Operates within a wide input voltage range, typically from 2.7V to 5.5V, making it suitable for various applications.
3. Adjustable Timing: Features adjustable delay times between the sequencing of each rail, allowing for customized power-up sequences based on system requirements.
4. Compact Package: Available in a compact MSOP-8 package, making it suitable for space-constrained applications.
5. Low Power Consumption: Designed for low power consumption, contributing to energy efficiency in the overall system.
6. Simple Design: Requires minimal external components, simplifying the design process and reducing overall system cost.
These features make the LM3881MM an effective solution for orderly power management in complex electronic systems.

Pinout

The LM3881MM is a power sequencing controller from Texas Instruments, typically used to manage the power-up and power-down sequences of multiple voltage rails. It is provided in an 8-pin MSOP (Mini Small Outline Package). Here is a brief overview of its pin functions:
1. EN (Enable): This pin is used to enable the device.
2. GND: Ground reference for the device.
3. C_T (Timing Capacitor): Connect a capacitor here to set the delay timing for sequencing.
4. VDD: Supply voltage pin for the device.
5. OUT1: First output, used to control the first voltage rail.
6. OUT2: Second output, used to control the second voltage rail.
7. OUT3: Third output, used to control the third voltage rail.
8. RESET: Active-low reset input.
The LM3881MM is designed to ensure proper sequencing of three power rails, preventing issues like inrush current and voltage conflicts, which are critical in complex systems with multiple power domains.

Manufacturer

The LM3881MM is manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company that designs and manufactures a wide range of electronic components. TI is known for its innovation in analog and embedded processing technologies, and it provides products that are crucial for a broad array of applications, including industrial, automotive, personal electronics, and communications equipment. Founded in 1930 and headquartered in Dallas, Texas, the company has a strong focus on research and development, consistently investing in new technologies to improve its product offerings. Texas Instruments is recognized for its contributions to the semiconductor industry and for developing products that enhance the performance and efficiency of various electronic systems.

Application

The LM3881MM is a simple power sequencing IC often used in applications requiring controlled power-up or power-down sequences. Key application areas include telecommunications, computing systems, industrial controls, and consumer electronics. It ensures that multiple power rails start up and shut down in a predefined order, protecting devices from potential damage due to improper sequencing. This is particularly useful in systems with microprocessors, FPGAs, or ASICs, where orderly power management is crucial for reliable operation. The device's simplicity, small size, and low power consumption make it suitable for compact and efficient designs.

Package

The LM3881MM is packaged in an 8-lead Mini Small Outline Package (MSOP), which is a compact, surface-mount package suitable for space-constrained applications.

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