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LTC3428EDD

Name: LTC3428EDD
Rating: 4.7 (12 reviews)

Switching Voltage Regulators LTC3428 - 4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm + 3mm DFN

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概述

Description

The LTC3428EDD is a high-efficiency, synchronous buck converter designed for step-down voltage regulation. It operates from a wide input voltage range of 2.5V to 15V and can deliver output currents up to 2A. The device features a 2.25MHz switching frequency, allowing for the use of small inductors and capacitors, which contributes to a compact design ideal for portable applications.
Key features include a low quiescent current for enhanced efficiency in battery-operated devices, a built-in voltage reference, and adjustable output voltage via external resistors. The LTC3428EDD also incorporates several protection mechanisms, including overcurrent protection and thermal shutdown. Its compact 12-lead DFN package facilitates easy integration into space-constrained designs.
This buck converter is suitable for a variety of applications, including portable electronics, LED drivers, and battery-powered devices, where efficiency, size, and thermal performance are critical.

Features

The LTC3428EDD is a high-performance step-down DC-DC converter designed for portable applications. Key features include:
1. Input Voltage Range: Operates from 2.5V to 5.5V, suitable for single-cell lithium-ion batteries.
2. Output Current: Delivers up to 1A of output current with high efficiency.
3. Efficiency: Up to 95% efficiency, minimizing heat generation.
4. Switching Frequency: Fixed frequency operation at 1.2MHz, allowing for smaller external components.
5. Low Quiescent Current: Low standby current enhances battery life in portable devices.
6. Adjustable Output Voltage: Output voltage adjustable from 0.8V to 5V.
7. Built-in Soft-Start: Reduces inrush current during startup.
8. Protection Features: Includes overcurrent protection, thermal shutdown, and short-circuit protection.
9. Small Package: Available in a compact 2mm x 2mm DFN package, ideal for space-constrained designs.
These features make it suitable for applications like battery-powered devices, automotive systems, and other low-voltage power supply needs.

Package

The LTC3428EDD is available in a 3mm x 3mm 16-lead QFN (quad flat no-lead) package. This compact package type is designed for efficient thermal performance and space-saving in electronic designs.

Pinout

The LTC3428EDD is a buck converter IC with a pin count of 16. Its primary function is to step down voltage efficiently, making it suitable for battery-powered applications. The key pins include:
1. VIN: Input voltage supply.
2. SW: Switch node for the inductor.
3. GND: Ground reference.
4. VOUT: Output voltage.
5. COMP: Compensation network connection.
6. SS: Soft-start control.
7. FB: Feedback pin for voltage regulation.
8. EN: Enable pin to turn the device on/off.
9. PG: Power good indicator.
10. VREF: Reference voltage output.
11. LC: Inductor current sense.
12. TSD: Thermal shutdown.
13. CHRG: Charge status indicator.
14. CC: Current limit control.
These features make the LTC3428EDD ideal for applications requiring compact, efficient power management.

Manufacturer

The LTC3428EDD is manufactured by Analog Devices, Inc., a leading global semiconductor company. Analog Devices specializes in high-performance analog, mixed-signal, and digital signal processing (DSP) integrated circuits. The company focuses on various sectors, including communications, automotive, industrial, and consumer electronics. They are recognized for their innovative solutions in signal processing and power management, catering to a wide range of applications.

Application

The LTC3428EDD is a high-efficiency DC-DC step-down (buck) converter used in various applications, including portable devices, battery-powered equipment, and power management systems. It is suitable for powering microcontrollers, sensors, and RF modules due to its low quiescent current and small footprint. Additionally, it can be used in telecommunications, automotive electronics, and industrial automation for efficient voltage regulation.

Equivalent

Equivalent products to the LTC3428EDD chip include the TP4056, MCP1640, and LM3671. These chips may have similar functions, such as step-up voltage regulation, but ensure to check specifications like input/output voltage, current ratings, and efficiency for specific applications. Always refer to datasheets for detailed comparisons.