LTC1771EMS8

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LTC1771EMS8

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Switching Voltage Regulators LTC1771 - 10- A Quiescent Current High Efficiency Step-Down DC/DC Controller

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仕様

属性

概要

Description

The LTC1771EMS8 is a high-efficiency, step-down (buck) DC/DC converter integrated circuit, manufactured by Linear Technology, now part of Analog Devices. It is designed to deliver efficient power conversion with minimal external components, making it suitable for compact and portable applications. The LTC1771 operates with an input voltage range of 2.5V to 9.8V, making it ideal for single lithium-ion cell or multi-cell NiMH/NiCd applications.
Key features include a fixed frequency operation of 550kHz, which facilitates the use of small inductors and capacitors, contributing to a reduced overall footprint. Its current-mode architecture ensures fast transient response and good loop stability. It also provides a maximum output current of up to 600mA, with an adjustable output voltage via an external resistor divider network.
Moreover, the LTC1771 includes features such as low shutdown current, internal soft-start, and overcurrent protection, enhancing its reliability and efficiency. The device is available in an 8-lead MSOP package, making it suitable for space-constrained designs.

Equivalent

The LTC1771EMS8 is a step-down (buck) DC/DC controller. Equivalent products include:
1. LM2596 by Texas Instruments - A step-down voltage regulator with similar functionality.
2. MC34063A by ON Semiconductor - A versatile DC/DC converter that can be configured as a buck converter.
3. TPS5430 by Texas Instruments - Provides similar step-down power conversion.
4. MAX639 by Maxim Integrated - A step-down switching regulator with similar applications.
These alternatives may vary slightly in specifications, so it's important to verify the requirements for specific applications.

Features

The LTC1771EMS8 is a high-efficiency step-down DC/DC converter controller. It features a wide input voltage range of 2.8V to 18V, making it versatile for a variety of applications. The device employs a constant-frequency, current-mode architecture, which allows for low noise and excellent line and load transient responses. It operates at a fixed frequency of 550kHz, enabling the use of small external components and minimizing the overall solution footprint.
Key features include a low shutdown current of 10µA, high efficiency of up to 95%, and the ability to deliver output currents up to several amperes with appropriate external components. The LTC1771EMS8 also supports Burst Mode operation, optimizing efficiency at light loads. It comes with built-in soft-start and current limiting features to protect against inrush currents and short circuits. The device is available in a compact MSOP-8 package, making it suitable for space-constrained designs. Overall, the LTC1771EMS8 is ideal for battery-powered and portable applications requiring efficient power conversion.

Pinout

The LTC1771EMS8 is a high-efficiency step-down (buck) DC/DC converter. It is typically housed in an 8-lead MSOP (Mini Small Outline Package), which means it has 8 pins. Here is a brief overview of its pin functions:
1. VIN: Input supply voltage.
2. SW: Switch node connection to the inductor.
3. GND: Ground pin.
4. FB: Feedback input for output voltage regulation.
5. ISET: Sets the maximum current limit.
6. SENSE: Current sense input.
7. RUN/SS: Run/soft-start control input.
8. SYNC/MODE: Synchronization and mode selection pin.
These pins assist in the regulation and control of the converter's operation, enabling efficient step-down conversion from the input voltage to a regulated lower output voltage.

Manufacturer

The LTC1771EMS8 is manufactured by Linear Technology Corporation. Linear Technology, now part of Analog Devices, Inc. after a merger in 2017, is a company that specializes in designing, manufacturing, and marketing a broad line of high-performance analog integrated circuits. These circuits include operational amplifiers, battery management systems, data converters, power management products, interface ICs, and more. The company's products are used in a variety of applications including telecommunications, networking products, industrial instrumentation, computers, automotive electronics, and consumer electronics.

Application

The LTC1771EMS8 is a high-efficiency, step-down (buck) DC/DC converter designed for battery-powered and portable applications. Its primary application areas include:
1. Portable Electronics: Used in devices such as smartphones, tablets, and laptops for efficient power management.
2. Battery-Powered Devices: Ideal for extending battery life in gadgets like digital cameras and handheld instruments.
3. Telecommunications: Employed in modems and routers to ensure stable power supply.
4. Automotive Systems: Utilized in infotainment and navigation systems for efficient voltage regulation.
5. Industrial Equipment: Supports various low-power industrial applications requiring DC/DC conversion.
These application areas benefit from the LTC1771EMS8's compact size, high efficiency, and low component count.

Package

The LTC1771EMS8 is packaged in an MSOP-8 (Mini Small Outline Package) form factor. This package type is compact, making it suitable for applications requiring space-saving components.

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