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LT3439EFE
+BOMIC REG PUSH-PULL 1A 16TSSOP
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ManufacturerAnalog Devices Inc.
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Mfr. Part #LT3439EFE
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Datasheet LT3439EFE DataSheet
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In Stock26733
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Specifications
| Attribute | Value |
| Part Status | Discontinued at DigiKey |
| Base Product Number | LT3439 |
| Function | Step-Up/Step-Down |
| Output Configuration | Positive, Isolation Capable |
| Topology | Push-Pull |
| Output Type | Fixed |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 2.8V |
| Voltage - Input (Max) | 17.5V |
| Current - Output | 1A |
| Frequency - Switching | 20kHz ~ 250kHz |
| Synchronous Rectifier | No |
| Mounting Type | Surface Mount |
| Package | 16-TSSOP (0.173", 4.40mm Width) Exposed Pad |
| Supplier Device Package | 16-TSSOP-EP |
| Packaging | Tube |
Overview
Description
The LT3439EFE is a high-performance, monolithic, step-down switching regulator. Manufactured by Analog Devices under the Linear Technology brand, it is designed to convert a higher voltage input to a lower voltage output while maintaining high efficiency. The device can handle input voltages ranging from 3.3V to 60V and delivers up to 2.8A of continuous output current.
Key features of the LT3439 include a high-speed switching frequency of up to 1.3MHz, which allows the use of smaller external components, resulting in a compact design. It also includes a built-in power switch, reducing the need for external MOSFETs, thus simplifying the design process. The regulator offers programmable soft-start, frequency foldback, and thermal shutdown for enhanced protection and reliability.
The LT3439EFE is typically used in applications such as automotive systems, industrial power supplies, and battery-powered devices, where efficiency, compactness, and robustness are critical. Its robust feature set makes it suitable for environments with varying input voltages and where space is a premium.
Key features of the LT3439 include a high-speed switching frequency of up to 1.3MHz, which allows the use of smaller external components, resulting in a compact design. It also includes a built-in power switch, reducing the need for external MOSFETs, thus simplifying the design process. The regulator offers programmable soft-start, frequency foldback, and thermal shutdown for enhanced protection and reliability.
The LT3439EFE is typically used in applications such as automotive systems, industrial power supplies, and battery-powered devices, where efficiency, compactness, and robustness are critical. Its robust feature set makes it suitable for environments with varying input voltages and where space is a premium.
Equivalent
The LT3439EFE is a high-voltage, monolithic buck-boost converter. Equivalent products could include the TPS63060 from Texas Instruments, the MAX16990 from Maxim Integrated, and the ADP2503 from Analog Devices, depending on specific requirements like input voltage range and output current. Always compare the specifications to ensure compatibility with your application.
Features
The LT3439EFE is a step-down switching regulator from Analog Devices, designed for efficient power management. Key features include:
1. Wide Input Voltage Range: It operates from a 3.3V to 60V input, making it versatile for use in various applications, from automotive to industrial power supplies.
2. Adjustable Output Voltage: The output voltage can be set from 1.25V up to 60V, offering flexibility in output requirements.
3. High Efficiency: It delivers high efficiency, typically over 90%, which reduces heat generation and improves performance.
4. Current Mode Control: This feature ensures fast transient response and easy loop compensation.
5. Low Quiescent Current: With a low quiescent current of 50µA, it is suitable for battery-powered applications.
6. Integrated Power Switch: The device includes a 3A switch, which simplifies the design and reduces the need for external components.
7. Protection Features: It includes overcurrent protection, thermal shutdown, and soft-start capability to enhance reliability and safety.
8. Package: Available in a thermally enhanced TSSOP package, which aids in heat dissipation.
These features make the LT3439EFE suitable for a wide range of applications requiring robust and efficient power conversion.
1. Wide Input Voltage Range: It operates from a 3.3V to 60V input, making it versatile for use in various applications, from automotive to industrial power supplies.
2. Adjustable Output Voltage: The output voltage can be set from 1.25V up to 60V, offering flexibility in output requirements.
3. High Efficiency: It delivers high efficiency, typically over 90%, which reduces heat generation and improves performance.
4. Current Mode Control: This feature ensures fast transient response and easy loop compensation.
5. Low Quiescent Current: With a low quiescent current of 50µA, it is suitable for battery-powered applications.
6. Integrated Power Switch: The device includes a 3A switch, which simplifies the design and reduces the need for external components.
7. Protection Features: It includes overcurrent protection, thermal shutdown, and soft-start capability to enhance reliability and safety.
8. Package: Available in a thermally enhanced TSSOP package, which aids in heat dissipation.
These features make the LT3439EFE suitable for a wide range of applications requiring robust and efficient power conversion.
Pinout
The LT3439EFE is a monolithic buck mode switching regulator by Analog Devices (formerly Linear Technology). It is specifically designed to provide a constant current output for driving high power LEDs.
This device comes in a 16-pin TSSOP package with the following pin functions:
1. SW: Switch node, connects to the inductor.
2. VIN: Supply voltage input.
3. GND: Ground reference.
4. VC: Compensation pin for stability.
5. VREF: Provides a reference voltage, typically 1.23V.
6. ISP: Positive current sense pin.
7. ISN: Negative current sense pin.
8. SHDN: Shutdown control pin.
9. RT: Timing resistor pin to set switching frequency.
10. FB: Feedback input for voltage regulation.
11. D1-D6: Additional pins for various functions such as thermal pad and additional ground connections.
The LT3439EFE is ideal for driving high power LEDs and can handle input voltages up to 60V, delivering efficiencies suitable for portable applications. It operates with a high switching frequency to minimize external component size.
This device comes in a 16-pin TSSOP package with the following pin functions:
1. SW: Switch node, connects to the inductor.
2. VIN: Supply voltage input.
3. GND: Ground reference.
4. VC: Compensation pin for stability.
5. VREF: Provides a reference voltage, typically 1.23V.
6. ISP: Positive current sense pin.
7. ISN: Negative current sense pin.
8. SHDN: Shutdown control pin.
9. RT: Timing resistor pin to set switching frequency.
10. FB: Feedback input for voltage regulation.
11. D1-D6: Additional pins for various functions such as thermal pad and additional ground connections.
The LT3439EFE is ideal for driving high power LEDs and can handle input voltages up to 60V, delivering efficiencies suitable for portable applications. It operates with a high switching frequency to minimize external component size.
Manufacturer
The LT3439EFE is manufactured by Analog Devices, Inc. This company is a multinational semiconductor company specializing in the design and manufacturing of analog, mixed-signal, and digital signal processing integrated circuits. Analog Devices provides products and solutions for a wide variety of applications, including communications, industrial, automotive, healthcare, and consumer electronics. The company is known for its expertise in high-performance analog technology, power management, data conversion, and signal processing solutions.
Application
The LT3439EFE is a high-voltage, high-efficiency step-down (buck) switching regulator. Its application areas include:
1. Automotive Systems: Suitable for powering infotainment systems, navigation units, and other electronic components within vehicles.
2. Industrial Equipment: Used in power supplies for industrial automation systems and machinery.
3. Telecommunications: Supports power regulation in networking equipment and base stations.
4. Consumer Electronics: Powers various consumer devices requiring stable voltage output from higher voltage sources.
5. Battery-Powered Devices: Efficiently manages power in devices requiring long battery life.
Its wide input voltage range and robust performance make it versatile for use in systems demanding reliable voltage regulation.
1. Automotive Systems: Suitable for powering infotainment systems, navigation units, and other electronic components within vehicles.
2. Industrial Equipment: Used in power supplies for industrial automation systems and machinery.
3. Telecommunications: Supports power regulation in networking equipment and base stations.
4. Consumer Electronics: Powers various consumer devices requiring stable voltage output from higher voltage sources.
5. Battery-Powered Devices: Efficiently manages power in devices requiring long battery life.
Its wide input voltage range and robust performance make it versatile for use in systems demanding reliable voltage regulation.
Package
The LT3439EFE is packaged in a 28-lead TSSOP (Thermally Enhanced Thin Shrink Small Outline Package) with an exposed pad for better thermal performance.
