LTC3621IDCB-25

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Efficiency, Low Quiescent Current, Wide Input Voltage Range
• Package: 6-Lead DFN (Dual Flat No-Lead)
• Essence: Step-Down DC/DC Converter
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage: 2.5V
• Maximum Output Current: 1A
• Switching Frequency: 1MHz
• Quiescent Current: 20µA
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

1. VIN: Input Voltage
2. GND: Ground
3. SW: Switch Node
4. FB: Feedback Voltage
5. EN: Enable Pin
6. VOUT: Output Voltage

Functional Features

• High Efficiency: The LTC3621IDCB-25 offers up to 95% efficiency, ensuring minimal power loss during voltage conversion.
• Low Quiescent Current: With a quiescent current of only 20µA, the IC minimizes power consumption in standby or low-load conditions.
• Wide Input Voltage Range: The device accepts input voltages ranging from 2.7V to 5.5V, making it suitable for various applications.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced power dissipation and longer battery life.
• Low quiescent current enables energy-efficient operation in standby mode.
• Wide input voltage range provides flexibility in power supply design.

Disadvantages

• Limited output voltage options (only 2.5V in this case).
• Requires external components for proper operation.

Working Principles

The LTC3621IDCB-25 is a step-down DC/DC converter that converts a higher input voltage to a lower output voltage. It utilizes a synchronous buck topology, where an internal power switch and a synchronous rectifier efficiently regulate the output voltage. The device operates at a fixed switching frequency of 1MHz, ensuring stable and reliable power conversion.

Detailed Application Field Plans

The LTC3621IDCB-25 is commonly used in various battery-powered applications, such as portable devices, IoT devices, and handheld instruments. Its high efficiency and low quiescent current make it suitable for energy-sensitive applications where power consumption needs to be minimized. The wide input voltage range allows it to be used with different types of power sources, including batteries and regulated power supplies.

Detailed and Complete Alternative Models

• LTC3621IDD-2.5: Similar to LTC3621IDCB-25 but in a 10-Lead DFN package.
• LTC3621IMS-2.5: Similar to LTC3621IDCB-25 but in a 10-Lead MSOP package.
• LTC3621HDD-2.5: Similar to LTC3621IDCB-25 but with a higher maximum output current of 2A.

Note: These alternative models offer similar functionality but may have different package options or enhanced specifications.

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