LTC3872ETS8

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LTC3872ETS8

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Switching Voltage Regulators LTC3872 - No RSENSE Current Mode Boost DC/DC Controller

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Specifications

Attribute Value

Overview

Description

The LTC3872ETS8 is a step-down (buck) DC/DC controller manufactured by Analog Devices, formerly Linear Technology. It is specifically designed for high-efficiency power conversion in various electronic devices. The controller operates with a wide input voltage range, typically from 4V to 36V, and can deliver high output current through the use of external N-channel MOSFETs.
One of the key features of the LTC3872ETS8 is its ability to operate at a fixed frequency, which is set by an external resistor, allowing for predictable and manageable electromagnetic interference (EMI). The device also incorporates a current-mode control architecture, providing fast transient response and easy loop compensation.
Additional features include programmable soft-start, current limit protection, and thermal shutdown to enhance reliability. Its compact TSOT-8 package makes it suitable for space-constrained applications, such as distributed power systems, battery-powered devices, and automotive electronics. The LTC3872ETS8 is known for its simplicity, cost-effectiveness, and ability to efficiently convert power while minimizing energy loss.

Equivalent

The LTC3872ETS8 is a step-down DC/DC controller. Equivalent products include:
1. Texas Instruments TPS40210 - A wide input range non-synchronous boost controller.
2. ON Semiconductor NCP3063 - A versatile DC-DC converter controller.
3. Microchip Technology MCP16311 - A high-speed step-down regulator.
4. Diodes Incorporated AP3012 - A step-up DC-DC converter.
When choosing an equivalent, consider factors such as input voltage range, switching frequency, and package size to ensure compatibility with your design.

Features

The LTC3872ETS8 is a high-performance, step-up DC/DC controller designed for efficient power conversion. Key features include:
1. Wide Input Voltage Range: It operates with a broad input voltage range, enhancing flexibility for various applications.
2. High Efficiency: The controller is designed for high-efficiency power conversion, which helps in reducing power loss and improving thermal performance.
3. Low Quiescent Current: It features low standby current, making it suitable for battery-operated devices, as it helps in prolonging battery life.
4. Adjustable Output Voltage: The output voltage is adjustable, providing versatility for different design requirements.
5. Constant Frequency Operation: It operates at a constant frequency, which helps minimize electromagnetic interference (EMI) and simplifies filter design.
6. Compact Package: Available in a small, thermally enhanced TSOT-23 package, making it ideal for space-constrained applications.
7. Current Mode Control: It uses current mode control for fast transient response and ease of loop compensation.
These features make the LTC3872ETS8 suitable for applications like portable electronics, telecommunications, and other devices needing efficient step-up power conversion.

Pinout

The LTC3872ETS8 is a step-down DC/DC controller from Analog Devices. It is housed in a TSOT-23 package with 8 pins. Here is a brief overview of its pin functions:
1. VIN: Supply voltage input.
2. GND: Ground.
3. RUN: Run control input. Enables the IC when pulled high.
4. ITH/RUN: Error amplifier output and run control input. Controls loop compensation.
5. SW: Switch node connection to the inductor.
6. VFB: Feedback voltage input. Connects to the output voltage divider.
7. BG: Bottom gate driver. Drives the gate of the external synchronous P-channel MOSFET.
8. BOOST: Bootstrapped supply to the top gate driver.
This controller is designed to provide high efficiency and operates with a wide input voltage range. It is optimized for high switching frequencies, making it suitable for compact and efficient power supply designs.

Manufacturer

The LTC3872ETS8 is manufactured by Analog Devices, Inc. Analog Devices is a multinational semiconductor company known for designing and manufacturing a wide range of analog, mixed-signal, and digital signal processing integrated circuits used in electronic equipment. They serve various markets including industrial, automotive, communications, healthcare, and consumer electronics. The company is renowned for its high-performance products and solutions that are critical in various applications such as data conversion, signal processing, power management, and automation.

Application

The LTC3872ETS8 is a step-up DC/DC controller used in various applications requiring efficient voltage boosting. Its key application areas include portable electronics, where space and efficiency are critical, battery-operated devices that need to step up the voltage efficiently, and systems requiring voltage regulation from a lower input voltage source. It is also used in automotive electronics for boosting battery voltages, industrial systems needing robust power management, and telecommunications equipment requiring efficient power conversion. Its compact design and high efficiency make it a versatile choice for a wide range of power management applications.

Package

The LTC3872ETS8 is a DC/DC step-down controller from Analog Devices, packaged in an 8-lead TSOT-23 (Thin Small Outline Transistor) package. This compact package is suitable for space-constrained applications.

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