LT3509EDE#PBF

Product Overview

Category

The LT3509EDE#PBF belongs to the category of integrated circuits (ICs) and specifically falls under the voltage regulators category.

Use

This product is primarily used for voltage regulation in various electronic devices and systems.

Characteristics

• The LT3509EDE#PBF is a high-efficiency, monolithic synchronous buck regulator.
• It operates with an input voltage range from 2.5V to 45V, making it suitable for a wide range of applications.
• The output voltage can be adjusted from 0.8V to VIN, providing flexibility in different power supply requirements.
• It offers a high switching frequency of up to 2.2MHz, enabling the use of small external components.
• The device incorporates internal power switches, reducing the need for additional external components.
• It features a low shutdown current, making it suitable for battery-powered applications.

Package and Quantity

The LT3509EDE#PBF is available in a 12-pin DFN (Dual Flat No-Lead) package. It is sold in quantities of one unit per package.

Specifications

• Input Voltage Range: 2.5V to 45V
• Output Voltage Range: 0.8V to VIN
• Switching Frequency: Up to 2.2MHz
• Package Type: 12-pin DFN
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT3509EDE#PBF has the following pin configuration:

1. VIN: Input Voltage
2. SW: Switch Node Connection
3. GND: Ground
4. FB: Feedback Voltage
5. SS: Soft-Start Capacitor
6. VCC: Internal Regulator Output
7. PGND: Power Ground
8. SYNC: External Synchronization
9. RT/CLK: Oscillator Frequency Control
10. COMP: Compensation Node
11. EN: Enable Pin
12. LX: Inductor Connection

Functional Features

• High efficiency voltage regulation.
• Wide input voltage range for versatile applications.
• Adjustable output voltage to meet specific power supply requirements.
• Internal power switches reduce the need for external components.
• Low shutdown current for battery-powered applications.
• Soft-start feature for controlled startup.

Advantages and Disadvantages

Advantages

• High efficiency operation.
• Wide input voltage range.
• Adjustable output voltage.
• Compact size due to high switching frequency.
• Integrated power switches reduce external component count.
• Suitable for battery-powered applications.

Disadvantages

• Limited maximum output current.
• Requires careful consideration of thermal management at higher loads.
• Higher cost compared to non-integrated voltage regulators.

Working Principles

The LT3509EDE#PBF operates as a synchronous buck regulator, converting a higher input voltage to a lower output voltage efficiently. It utilizes internal power switches to control the flow of current through an inductor, which stores energy during the on-time and releases it to the load during the off-time. This switching action allows for efficient voltage conversion with minimal power loss.

The device incorporates a feedback loop that compares the output voltage to a reference voltage and adjusts the duty cycle of the internal switches accordingly to maintain a stable output voltage. Additional features like soft-start and synchronization enhance the performance and flexibility of the regulator.

Detailed Application Field Plans

The LT3509EDE#PBF finds application in various fields, including but not limited to: - Industrial automation systems - Automotive electronics - Telecommunications equipment - Power management modules - Portable electronic devices - Battery-powered systems

Its wide input voltage range, adjustable output voltage, and high efficiency make it suitable for diverse applications where voltage regulation is required.

Detailed and Complete Alternative Models

• LT3509EDE#TRPBF: Similar to LT3509EDE#PBF, but available in tape and reel packaging.
• LT3509EFE#PBF: A similar buck regulator with a different package (16-pin TSSOP).
• LT3509EDE#PBF-1: A variant with extended temperature range (-40°C to 150°C).

These alternative models offer similar functionality and can be considered based on specific application requirements.

In conclusion, the LT3509EDE#PBF is a high-efficiency synchronous buck regulator that provides voltage regulation in a wide range of applications. Its adjustable output voltage, compact size, and integrated features make it a versatile choice for various electronic systems. However, careful consideration of thermal management and maximum output current limitations is necessary.