LTC3618EUF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Efficiency, Low Quiescent Current, Wide Input Voltage Range
• Package: 4mm x 3mm DFN-12
• Essence: Step-Down DC/DC Converter
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

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

Detailed Pin Configuration

The LTC3618EUF features a 12-pin DFN package with the following pin configuration:

1. VIN: Input Voltage
2. SW: Switch Node Connection
3. GND: Ground
4. FB: Feedback Voltage
5. EN: Enable Pin
6. SS: Soft-Start Capacitor Connection
7. PGND: Power Ground
8. VOUT: Output Voltage
9. VCC: IC Supply Voltage
10. BST: Bootstrap Capacitor Connection
11. AGND: Analog Ground
12. PGOOD: Power Good Indicator

Functional Features

• High Efficiency: The LTC3618EUF offers high efficiency conversion, minimizing power losses.
• Low Quiescent Current: With a quiescent current of only 20µA, it reduces power consumption during standby or light load conditions.
• Wide Input Voltage Range: The IC can accept input voltages ranging from 2.25V to 5.5V, providing flexibility in various applications.

Advantages and Disadvantages

Advantages

• High efficiency conversion
• Low quiescent current
• Wide input voltage range
• Small package size
• Power good indicator

Disadvantages

• Limited maximum output current (1A)

Working Principles

The LTC3618EUF is a step-down DC/DC converter that utilizes a high-frequency switching regulator to efficiently convert the input voltage to a lower output voltage. It employs a synchronous rectification topology to minimize power losses and maximize efficiency. The IC regulates the output voltage by adjusting the duty cycle of the internal switches based on the feedback voltage.

Detailed Application Field Plans

The LTC3618EUF is suitable for a wide range of applications, including but not limited to:

1. Portable electronic devices
2. Battery-powered systems
3. IoT devices
4. Industrial equipment
5. Automotive electronics

Detailed and Complete Alternative Models

1. LTC3618EUFD: Similar to LTC3618EUF, but with a DFN-12 package and additional features.
2. LTC3618IMSE: Similar functionality as LTC3618EUF, but in a smaller MSOP-12 package.
3. LTC3618HFE: Higher maximum output current (2A) compared to LTC3618EUF, suitable for applications requiring higher power.

These alternative models provide similar functionality to the LTC3618EUF, catering to different package preferences or specific application requirements.

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