LTC3621IDCB-5

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency step-down DC/DC converter - Wide input voltage range: 2.25V to 5.5V - Output voltage: 0.6V to VIN - Maximum output current: 1A - Low quiescent current: 20µA - Adjustable frequency: 1MHz to 3MHz - Synchronous rectification for high efficiency - Internal soft-start and current limit - Thermal shutdown protection - Small package size: 4mm x 3mm DFN-10

Package: DFN-10

Essence: The LTC3621IDCB-5 is a high-efficiency step-down DC/DC converter designed for power management applications. It offers a wide input voltage range, adjustable output voltage, and high output current capability.

Packaging/Quantity: The LTC3621IDCB-5 is available in a small 10-pin DFN package. The quantity per reel is typically 3000 units.

Specifications

• Input Voltage Range: 2.25V to 5.5V
• Output Voltage Range: 0.6V to VIN
• Maximum Output Current: 1A
• Quiescent Current: 20µA
• Frequency Range: 1MHz to 3MHz
• Package Type: DFN-10
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LTC3621IDCB-5 has the following pin configuration:

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| | --| VIN GND|-- Pin 1: Ground --| SW FB |-- Pin 2: Feedback Voltage --| EN VOUT|-- Pin 3: Output Voltage --| PGND SYNC|-- Pin 4: Synchronization Input --| SS VFB |-- Pin 5: Feedback Voltage --| RT MODE|-- Pin 6: Mode Selection --| ITH PGND|-- Pin 7: Ground --| LX PGND|-- Pin 8: Ground --| VIN PGND|-- Pin 9: Ground |___________| ```

Functional Features

• High efficiency step-down DC/DC converter
• Wide input voltage range for versatile applications
• Adjustable output voltage to meet specific requirements
• Synchronous rectification for improved efficiency
• Internal soft-start and current limit for reliable operation
• Thermal shutdown protection to prevent overheating

Advantages and Disadvantages

Advantages: - High efficiency conversion - Wide input voltage range - Adjustable output voltage - Small package size - Thermal shutdown protection

Disadvantages: - Limited maximum output current (1A)

Working Principles

The LTC3621IDCB-5 is a step-down DC/DC converter that uses a synchronous rectification topology. It operates by converting a higher input voltage to a lower output voltage with high efficiency. The internal control circuitry adjusts the duty cycle of the switching transistor to regulate the output voltage. The converter also includes features like soft-start, current limit, and thermal shutdown protection to ensure safe and reliable operation.

Detailed Application Field Plans

The LTC3621IDCB-5 can be used in various power management applications, including but not limited to: - Battery-powered devices - Portable electronics - Industrial equipment - Automotive systems - IoT devices

Detailed and Complete Alternative Models

Some alternative models to the LTC3621IDCB-5 include: - LTC3621IDD-5: Similar specifications and features, but in a different package (DFN-10) - LTC3621IMS-5: Similar specifications and features, but in a different package (MSOP-10) - LTC3621EDCB-5: Similar specifications and features, but with extended temperature range (-40°C to 150°C)

These alternative models provide flexibility in terms of package options and operating temperature ranges.

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