LTC3408EDD#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency step-down DC/DC converter - Low quiescent current - Wide input voltage range - Adjustable output voltage - Small package size

Package: DFN-8 (3mm x 3mm)

Essence: The LTC3408EDD#TRPBF is a high-performance, step-down DC/DC converter designed for power management applications. It offers high efficiency and low quiescent current, making it suitable for battery-powered devices.

Packaging/Quantity: The LTC3408EDD#TRPBF is available in a DFN-8 package and is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Output Voltage Range: 0.6V to VIN
• Maximum Output Current: 600mA
• Quiescent Current: 20µA
• Switching Frequency: 1.2MHz
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LTC3408EDD#TRPBF has the following pin configuration:

```

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| | --| VIN SW |-- --| GND FB |-- --| EN VOUT|-- |___________| ```

• VIN: Input voltage
• SW: Switch node
• GND: Ground
• FB: Feedback voltage
• EN: Enable pin
• VOUT: Output voltage

Functional Features

1. High Efficiency: The LTC3408EDD#TRPBF utilizes a synchronous rectification architecture, resulting in high conversion efficiency.
2. Low Quiescent Current: The device has a low quiescent current of only 20µA, minimizing power consumption during standby or idle modes.
3. Wide Input Voltage Range: The IC can accept input voltages ranging from 2.5V to 5.5V, making it compatible with various power sources.
4. Adjustable Output Voltage: The output voltage can be adjusted from 0.6V to the input voltage (VIN), providing flexibility for different applications.
5. Small Package Size: The LTC3408EDD#TRPBF is packaged in a compact DFN-8 package, saving board space in electronic designs.

Advantages and Disadvantages

Advantages: - High efficiency - Low quiescent current - Wide input voltage range - Adjustable output voltage - Small package size

Disadvantages: - Limited maximum output current (600mA)

Working Principles

The LTC3408EDD#TRPBF operates as a step-down DC/DC converter using a synchronous rectification architecture. It converts a higher input voltage to a lower output voltage by controlling the duty cycle of an internal switch. The high switching frequency (1.2MHz) allows for the use of small external components, resulting in a compact design.

When enabled, the LTC3408EDD#TRPBF regulates the output voltage based on the feedback voltage (FB) provided. The device continuously monitors the output voltage and adjusts the duty cycle to maintain a stable output.

Detailed Application Field Plans

The LTC3408EDD#TRPBF is commonly used in various battery-powered devices, such as: - Portable electronics (smartphones, tablets, portable media players) - Wearable devices (smartwatches, fitness trackers) - IoT devices - Wireless communication modules - Battery-powered sensors

Detailed and Complete Alternative Models

1. LTC3408EDD#PBF: Similar to LTC3408EDD#TRPBF, but available in a standard DFN-8 package.
2. LTC3408ES6#TRMPBF: A smaller version of the LTC3408EDD#TRPBF, packaged in a TSOT-23-6 package.
3. LTC3408EMSE#PBF: Offers additional features like adjustable soft-start and thermal shutdown protection. Packaged in an MSOP-10E package.

These alternative models provide similar functionality and can be considered as substitutes for the LTC3408EDD#TRPBF based on specific design requirements.

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