LTC1625IS

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LTC1625IS

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Switching Voltage Regulators LTC1625 - No RSENSE Current Mode Synchronous Step-Down Switching Regulator

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Specifications

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Overview

Description

The LTC1625IS is a high-performance, synchronous step-down switching regulator controller designed by Linear Technology (now part of Analog Devices). It is optimized for high efficiency and can deliver output currents up to 20A with minimal external components. The LTC1625IS operates at a fixed frequency of 200kHz, ensuring low noise operation and improved efficiency across a wide range of load conditions.
Key features include a 4V to 36V input voltage range, adjustable output voltage, and a high-efficiency synchronous rectification capability. It employs a current-mode architecture, which provides excellent line and load regulation, and offers a soft-start feature to prevent inrush current during startup. It also includes built-in protection mechanisms like overcurrent protection, short-circuit protection, and thermal shutdown.
Overall, the LTC1625IS is suitable for applications requiring efficient power conversion, such as distributed power systems, telecom, and industrial systems, where its robust performance and reliability are essential.

Equivalent

The LTC1625IS is a synchronous step-down switching regulator controller. Equivalent products may include similar DC-DC converter controllers from other manufacturers, such as the TI TPS40077, Maxim MAX1719, or ON Semiconductor's NCP3163. When seeking equivalents, ensure they match the electrical characteristics, input/output voltage range, switching frequency, and current handling of the LTC1625IS. Always verify compatibility based on the specific requirements of your application.

Features

The LTC1625IS is a high-performance step-down switching regulator controller designed for efficient power management in various applications. Key features include:
1. High Efficiency: It offers high efficiency over a wide load range, which is beneficial for battery-powered devices.
2. Input Voltage Range: The device supports a broad input voltage range, allowing flexibility in design and use with different power sources.
3. Output Voltage: It provides a precise adjustable output voltage, which can be set via an external resistor divider.
4. Current Mode Control: Employs current mode control for fast transient response and ease of loop compensation.
5. MOSFET Drivers: Integrates high-current gate drivers for external N-channel MOSFETs, enhancing efficiency and reducing size.
6. Frequency Synchronization: Allows synchronization to an external clock, facilitating multi-phase operation and reducing electromagnetic interference (EMI).
7. Protection Features: Includes overcurrent protection, thermal shutdown, and undervoltage lockout to enhance reliability and safety.
8. Compact Package: Offered in a space-efficient package, making it suitable for compact electronic designs.
These features make the LTC1625IS a versatile choice for applications requiring reliable and efficient step-down conversion.

Pinout

The LTC1625IS is a high-efficiency step-down switching regulator controller from Linear Technology. It typically comes in an 8-pin SO package. Here's a brief overview of its pin functions:
1. SGND: Signal Ground. This is the ground reference for the control circuitry.
2. VFB: Voltage Feedback. Connects to the external resistor divider from the output for voltage regulation.
3. ILIM: Current Limit. Sets the current limit threshold for protection.
4. SYNC: Synchronization Input. Allows the device to be synchronized with an external clock.
5. RUN/SS: Run/Soft-Start. Controls the startup and enables soft-start functionality.
6. Ith/Rd: Error Amplifier Compensation and Shutdown. Used for compensation and can also be tied to ground for shutdown.
7. SW: Switch Node. Connects to the output inductor.
8. Vin: Input Supply. Powers the internal circuitry.
These pins enable the LTC1625IS to efficiently convert an input voltage to a lower output voltage with various features like current limiting, soft-start, and the ability to synchronize with an external clock.

Manufacturer

The LTC1625IS is manufactured by Linear Technology Corporation. Linear Technology, founded in 1981, is a company that specializes in designing, manufacturing, and marketing a broad line of high-performance analog integrated circuits. Their products serve a variety of applications across industries such as telecommunications, networking, industrial, automotive, computer, medical, and consumer electronics. In 2017, Linear Technology was acquired by Analog Devices, Inc., another leading company in the analog technology industry. Analog Devices continues to offer Linear Technology's product lines, integrating them into its own portfolio.

Application

The LTC1625IS is a step-down switching regulator IC, commonly used in applications requiring efficient voltage regulation. Key application areas include:
1. Power Supply Solutions: Used in systems needing stable power from higher voltage sources, such as in point-of-load converters for distributed power systems.
2. Telecommunications: Provides efficient power management in telecom equipment.
3. Computer Systems: Utilized in motherboards and peripheral cards for powering processors and chipsets.
4. Industrial Equipment: Supports automation systems and instrumentation by supplying stable voltages.
5. Consumer Electronics: Ensures efficient battery usage in devices like set-top boxes and gaming consoles.
These applications benefit from its high efficiency, wide input voltage range, and low output voltage ripple.

Package

The LTC1625IS is a high-efficiency step-down switching regulator, and it typically comes in an SO-8 package. This package type is a small outline package with 8 pins, designed for surface-mount technology, which is suitable for compact and efficient circuit designs.

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