LTC3703IG-5#PBF

Product Overview

Category

The LTC3703IG-5#PBF belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This product is primarily used in various power management systems, including but not limited to voltage regulators, DC-DC converters, and battery charging circuits.

Characteristics

• High efficiency: The LTC3703IG-5#PBF offers high conversion efficiency, ensuring optimal power utilization.
• Wide input voltage range: It can operate with a wide range of input voltages, making it suitable for diverse applications.
• Low quiescent current: The IC has low power consumption during standby or idle mode, enhancing energy efficiency.
• Fast transient response: It exhibits excellent transient response characteristics, enabling quick adaptation to load changes.

Package

The LTC3703IG-5#PBF is available in a compact and industry-standard 16-pin SOIC (Small Outline Integrated Circuit) package. This package ensures ease of integration into various circuit designs.

Essence

The essence of the LTC3703IG-5#PBF lies in its ability to efficiently manage power in a wide range of applications, providing stable and regulated output voltages.

Packaging/Quantity

The LTC3703IG-5#PBF is typically packaged in reels, containing a quantity of 250 units per reel. This packaging format ensures convenient handling and storage during manufacturing processes.

Specifications

• Input Voltage Range: 4V to 36V
• Output Voltage Range: 0.8V to 34V
• Maximum Output Current: 3A
• Switching Frequency: Adjustable up to 1MHz
• Operating Temperature Range: -40°C to 125°C
• Control Method: Current Mode PWM (Pulse Width Modulation)
• Protection Features: Overcurrent Protection, Overtemperature Protection, Undervoltage Lockout

Detailed Pin Configuration

The LTC3703IG-5#PBF features a 16-pin SOIC package with the following pin configuration:

1. VIN: Input Voltage
2. GND: Ground
3. FB: Feedback Pin
4. COMP: Compensation Pin
5. SS/TR: Soft-Start/Tracking Pin
6. SYNC: Synchronization Pin
7. VCC: Power Supply for Internal Circuitry
8. PGND: Power Ground
9. SW: Switch Node
10. SW: Switch Node
11. SW: Switch Node
12. SW: Switch Node
13. VOUT: Output Voltage
14. VOUT: Output Voltage
15. VOUT: Output Voltage
16. VOUT: Output Voltage

Functional Features

• Current Mode Control: The LTC3703IG-5#PBF utilizes current mode control to regulate the output voltage, providing excellent stability and response to load variations.
• Adjustable Frequency: The switching frequency can be adjusted up to 1MHz, allowing optimization for different applications and operating conditions.
• Soft-Start Function: The soft-start feature ensures a controlled startup, preventing excessive inrush current and minimizing stress on the components.
• Synchronization Capability: The SYNC pin enables synchronization with an external clock signal, facilitating system integration and reducing electromagnetic interference (EMI).
• Protection Mechanisms: The IC incorporates various protection features such as overcurrent protection, overtemperature protection, and undervoltage lockout, ensuring safe operation and preventing damage to the device.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced power dissipation and improved energy utilization.
• Wide input voltage range allows compatibility with diverse power sources.
• Fast transient response ensures stable output voltage during load fluctuations.
• Compact package facilitates easy integration into circuit designs.
• Protection features enhance reliability and prevent damage to the device.

Disadvantages

• Limited maximum output current (3A) may not be suitable for high-power applications.
• Requires external components for proper operation, increasing overall system complexity.

Working Principles

The LTC3703IG-5#PBF operates based on a current mode control architecture. It regulates the output voltage by adjusting the duty cycle of the internal power switch. The feedback loop continuously monitors the output voltage and compares it with a reference voltage. Any deviation from the desired output voltage results in an error signal, which is used to adjust the duty cycle and maintain the output voltage within the specified range.

The IC also incorporates various protection mechanisms to ensure safe operation. Overcurrent protection limits the output current to prevent damage to the device and connected components. Overtemperature protection shuts down the IC if the temperature exceeds a certain threshold, preventing thermal damage. Undervoltage lockout disables the IC when the input voltage falls below a specified level, protecting against insufficient power supply conditions.

Detailed Application Field Plans

The LTC3703IG-5#PBF finds extensive application