LTC1144IS8

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LTC1144IS8

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Switching Voltage Regulators LTC1144 - Switched-Capacitor Wide Input Range Voltage Converter with Shutdown

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概述

Description

The LTC1144IS8 is a charge pump voltage converter manufactured by Linear Technology (now part of Analog Devices). It is designed to provide a simple and efficient solution for voltage conversion in various electronic applications. This IC typically operates as a voltage inverter, converting a positive input voltage to a corresponding negative output voltage. The device is housed in an 8-pin SOIC package, making it suitable for compact circuit designs.
Key features of the LTC1144IS8 include low quiescent current, high efficiency, and the capability to operate over a wide input voltage range. It is ideal for battery-powered applications due to its low power consumption. The LTC1144 can handle input voltages up to 12V and provides an output current of up to 20mA, making it suitable for low to moderate power applications. Additionally, it offers features like short-circuit protection and a shutdown pin for power-saving purposes. Its simplicity and ease of use make it a popular choice for designers needing a reliable inverter in their circuits.

Equivalent

The LTC1144IS8 is a switched-capacitor voltage converter. Equivalent products include:
1. MAX1044: A similar charge pump voltage converter from Maxim Integrated.
2. ICL7660: A widely used charge pump voltage converter from Intersil (Renesas).
3. TC1044: A Microchip Technology equivalent to the ICL7660.
4. LM2660: A voltage converter from Texas Instruments with similar functionality.
Please verify specifications to ensure compatibility with your application.

Features

The LTC1144IS8 is a switched-capacitor voltage converter designed to either invert or double an input voltage. It features a wide operating voltage range from 2V to 18V, making it versatile for various applications. The device is known for its low quiescent current, typically around 150μA, which enhances efficiency, particularly in battery-powered devices.
The LTC1144IS8 offers a high conversion efficiency, approximately 90%, and features a low output resistance, around 120 ohms, ensuring minimal voltage drop under load. It operates at a fixed frequency of 10kHz, which helps minimize noise and allows for smaller capacitors.
Additional features include built-in ESD protection, a shutdown pin to reduce power consumption when not in use, and the ability to be configured easily with minimal external components. With an 8-pin SOIC package, it is suitable for compact circuit designs. These characteristics make the LTC1144IS8 ideal for applications such as negative voltage generation, voltage doubling, and providing power to analog circuits.

Pinout

The LTC1144IS8 is an 8-pin integrated circuit from Analog Devices, designed as a switched-capacitor voltage converter. Its primary function is to invert, double, or divide an input voltage, depending on the configuration. The pin configuration is typically as follows:
1. V+: Positive supply voltage input.
2. CAP+: Positive terminal for the external flying capacitor.
3. GND: Ground connection.
4. CAP-: Negative terminal for the external flying capacitor.
5. OUT: Voltage output.
6. LV: Low voltage tap, used for improving efficiency at low voltages.
7. NC: No connection (may also be used for additional functionality in some configurations).
8. FC: Frequency control pin, used to set the oscillator frequency.
The device is designed to be used in applications requiring voltage level adjustments, such as power supply circuits and battery-powered devices.

Manufacturer

The LTC1144IS8 is manufactured by Linear Technology Corporation. Linear Technology, now part of Analog Devices, Inc. after being acquired in 2017, was known for designing, manufacturing, and marketing a broad line of high-performance analog integrated circuits. The company specialized in products like data converters, power management ICs, amplifiers, and interface products, catering primarily to the industrial, automotive, and telecommunications markets.

Application

The LTC1144IS8 is an integrated charge pump voltage converter. Its application areas include:
1. Voltage Inversion: Converting a positive input voltage into a negative output voltage, useful in operational amplifier circuits and other analog applications.
2. Voltage Doubling: Doubling a DC voltage for applications requiring higher voltages without additional power supplies.
3. Power Supply Generation: Providing power supply voltages for circuits in portable devices, such as smartphones and tablets.
4. Battery-Powered Systems: Extending battery life by efficiently managing power conversion in devices like cameras, sensors, and portable instrumentation.
5. Low-Noise Applications: Used in systems where low noise is critical, such as RF circuits and precision measurement devices.

Package

The LTC1144IS8 is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) package.

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