LT3494EDDB

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LT3494EDDB

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Switching Voltage Regulators LT3494 - Micropower Low Noise Boost Converters with Output Disconnect

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概述

Description

The LT3494EDDB is a micropower step-up DC/DC converter designed by Analog Devices (formerly Linear Technology). It is optimized for applications that require efficient voltage boosting from a low input voltage source, such as battery-powered devices. The device operates over a wide input voltage range and is capable of delivering a regulated output voltage with minimal external components, making it suitable for compact and space-constrained applications.
Key features include a low quiescent current, high efficiency, and an integrated power switch which simplifies the design and reduces the need for external components. It also features a shutdown mode to further reduce power consumption. The LT3494EDDB comes in a compact 8-lead DFN package, allowing for efficient thermal management and easy integration into various electronic designs.
This converter is particularly used in applications like portable electronics, medical devices, and other situations where maintaining extended battery life is crucial. Its robust design ensures reliable performance under varying operating conditions.

Equivalent

The LT3494EDDB is a high-voltage boost converter from Analog Devices. Equivalent products could include:
1. Texas Instruments: TPS61041 - a similar boost converter.
2. Microchip Technology: MCP1640 - a non-synchronous boost converter.
3. ON Semiconductor: NCP1402 - a DC-DC boost converter.
4. Rohm: BD8392GUL - a high-efficiency boost converter.
Ensure to check specific technical requirements like voltage, current ratings, and package type when selecting alternatives.

Features

The LT3494EDDB is a constant current, constant voltage step-up DC/DC converter designed for driving high current LEDs. Key features include:
1. Wide Input Voltage Range: Operates from 2.3V to 20V, allowing flexibility in power supply sources.
2. High Efficiency: Delivers up to 90% efficiency, thereby minimizing heat generation and power loss.
3. Internal Power Switch: Integrates a 30V, 1.3A switch, reducing the need for external components.
4. LED Current Regulation: Provides accurate LED current regulation, which ensures consistent brightness across varying conditions.
5. Dimming Capability: Supports analog and PWM dimming for adjustable light output to suit different applications.
6. Open LED Protection: Built-in protection that prevents damage in the event of an open-circuit situation with the LEDs.
7. Compact Package: Available in a 3mm × 2mm DFN-8 package, making it suitable for space-constrained designs.
8. Soft-Start Feature: Reduces inrush current during startup, enhancing reliability and longevity.
These features make the LT3494EDDB ideal for applications requiring efficient and reliable LED driving, such as backlighting, display panels, and portable lighting.

Pinout

The LT3494EDDB is a micropower step-up DC/DC converter from Analog Devices (formerly Linear Technology). It is designed to convert lower input voltages to higher output voltages with high efficiency. Here’s a concise summary of its pin count and key functions:
- Pin Count: The LT3494EDDB comes in a 6-lead (or pin) DFN package.

- Key Functions:
- SW (Switch Node): Connects to the inductor and is involved in the switch cycle.
- GND (Ground): Common ground for the device.
- FB (Feedback): Used for setting the output voltage through an external resistor divider.
- SHDN (Shutdown): Used to enable or disable the converter.
- VIN (Input Voltage): Supplies the input voltage to the converter.
- VOUT (Output Voltage): Provides the regulated output voltage.
The LT3494EDDB is suitable for applications such as OLED displays, biasing of photo diodes, and other low-power systems that require step-up voltage conversion.

Manufacturer

The LT3494EDDB is manufactured by Analog Devices, Inc. Originally, it was developed by Linear Technology, a company that Analog Devices acquired in 2017. Analog Devices, Inc. is a multinational semiconductor company that specializes in the design and manufacturing of analog, mixed-signal, and digital signal processing (DSP) integrated circuits used in electronic equipment. They serve various industries, including automotive, communications, industrial, and consumer electronics, providing technology solutions for data conversion, signal processing, power management, and more.

Application

The LT3494EDDB is a boost converter IC designed for efficient power conversion in various applications. Its primary application areas include driving LED backlighting for LCD displays, powering OLED displays, and serving as a power supply for portable devices that require efficient voltage step-up. Additionally, it is suitable for battery-powered systems, as it offers low quiescent current and high efficiency, which extends battery life. The IC can also be used in general-purpose boost conversion applications where a compact and efficient solution is necessary. Its integrated power switch and wide input voltage range make it versatile for consumer electronics, automotive, and industrial applications.

Package

The LT3494EDDB is a switching regulator IC that typically comes in a 10-lead (3mm x 3mm) DFN (Dual Flat No-Lead) package. This package type is known for its compact design, providing effective thermal management and efficient space utilization for surface mount applications.

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