LTC3412AIUF#PBF

Product Overview

Category

LTC3412AIUF#PBF belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This product is commonly used in various electronic devices to regulate and control power supply, ensuring efficient and reliable operation.

Characteristics

• High efficiency: LTC3412AIUF#PBF offers excellent power conversion efficiency, minimizing energy loss during operation.
• Wide input voltage range: It can handle a broad range of input voltages, making it suitable for diverse applications.
• Compact package: The product comes in a small form factor, allowing for space-saving integration into electronic systems.
• Low quiescent current: LTC3412AIUF#PBF exhibits low power consumption during standby or idle modes, enhancing overall energy efficiency.

Package and Quantity

LTC3412AIUF#PBF is available in a compact 16-pin QFN (Quad Flat No-Lead) package. It is typically sold in reels containing a specified quantity, usually around 2500 units per reel.

Specifications

• Input Voltage Range: 2.25V to 5.5V
• Output Voltage Range: 0.6V to VIN
• Maximum Output Current: 3A
• Switching Frequency: Adjustable up to 4MHz
• Operating Temperature Range: -40°C to 125°C
• Efficiency: Up to 95%
• Quiescent Current: 50µA

Pin Configuration

The LTC3412AIUF#PBF integrates multiple pins, each serving a specific function. The following table provides a detailed pin configuration:

| Pin Number | Pin Name | Function | |------------|----------|----------| | 1 | VIN | Input Voltage | | 2 | SW | Switch Node | | 3 | GND | Ground | | 4 | FB | Feedback Voltage | | 5 | EN | Enable Pin | | 6 | SS | Soft-Start Control | | 7 | VOUT | Output Voltage | | 8 | PGND | Power Ground | | 9 | AGND | Analog Ground | | 10 | COMP | Compensation Node | | 11 | RT | Oscillator Timing Resistor | | 12 | CT | Oscillator Timing Capacitor | | 13 | SYNC | Synchronization Input | | 14 | MODE | Mode Selection | | 15 | BST | Bootstrap Capacitor | | 16 | LX | Inductor Connection |

Functional Features

• Wide Input Voltage Range: LTC3412AIUF#PBF can efficiently regulate power supply from 2.25V to 5.5V, accommodating various input sources.
• High Efficiency: With an efficiency of up to 95%, this IC minimizes energy loss and maximizes power conversion efficiency.
• Adjustable Switching Frequency: The switching frequency can be adjusted up to 4MHz, allowing flexibility in optimizing performance for different applications.
• Soft-Start Control: The soft-start feature ensures a gradual increase in output voltage during startup, preventing excessive current flow and potential damage to the system.
• Synchronization Capability: The SYNC pin enables synchronization with an external clock signal, facilitating coordination with other components in the system.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced power consumption and longer battery life.
• Wide input voltage range enhances versatility and compatibility with various power sources.
• Compact package enables space-saving integration into electronic devices.
• Soft-start control protects the system from sudden voltage surges during startup.
• Synchronization capability allows for coordinated operation with other components.

Disadvantages

• Limited maximum output current of 3A may not be suitable for high-power applications.
• The small form factor may make it challenging to handle during assembly or repair processes.

Working Principles

LTC3412AIUF#PBF operates based on a switching regulator topology. It utilizes a combination of inductors, capacitors, and switches to convert the input voltage into a regulated output voltage. The IC employs pulse-width modulation (PWM) techniques to control the duty cycle of the switching signal, regulating the output voltage according to the desired specifications.

During operation, the input voltage is first stepped down by the internal power stage, which includes an inductor and a switch. The resulting energy is stored in the inductor during the ON state of the switch and then transferred to the output capacitor during the OFF state. This continuous energy transfer ensures a stable output voltage.

The feedback mechanism, facilitated by the FB pin, compares the actual output voltage with a reference voltage and adjusts the duty cycle accordingly to maintain the desired output voltage level.

Detailed Application Field Plans