LT3973EDD-3.3#PBF

Product Overview

Category

The LT3973EDD-3.3#PBF belongs to the category of integrated circuits (ICs) and specifically falls under the voltage regulators category.

Use

This product is primarily used for voltage regulation in various electronic devices and systems.

Characteristics

• Input Voltage Range: 2.7V to 60V
• Output Voltage: 3.3V
• Maximum Output Current: 1A
• Efficiency: Up to 95%
• Switching Frequency: 2.2MHz
• Package Type: DFN-12
• Operating Temperature Range: -40°C to 125°C

Package and Quantity

The LT3973EDD-3.3#PBF is available in a DFN-12 package. It is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: The LT3973EDD-3.3#PBF can accept input voltages ranging from 2.7V to 60V, making it suitable for a wide range of applications.
• Output Voltage: This voltage regulator provides a fixed output voltage of 3.3V, ensuring stable power supply to connected devices.
• Maximum Output Current: With a maximum output current of 1A, the LT3973EDD-3.3#PBF can deliver sufficient power to drive various components.
• Efficiency: The device offers high efficiency, reaching up to 95%, which helps minimize power losses and maximize battery life.
• Switching Frequency: Operating at a switching frequency of 2.2MHz, the LT3973EDD-3.3#PBF enables compact designs by allowing the use of smaller external components.
• Package Type: The LT3973EDD-3.3#PBF is packaged in a DFN-12 package, which provides good thermal performance and ease of integration into circuit boards.
• Operating Temperature Range: This voltage regulator can operate within a wide temperature range, from -40°C to 125°C, ensuring reliable performance in various environments.

Pin Configuration

The LT3973EDD-3.3#PBF features a DFN-12 package with the following pin configuration:

1. VIN: Input Voltage
2. SW: Switch Node Connection
3. GND: Ground
4. FB: Feedback Pin
5. SS: Soft-Start Capacitor Connection
6. VCC: Internal Regulator Output
7. PGND: Power Ground
8. EN/UVLO: Enable/Input Undervoltage Lockout
9. SYNC: Synchronization Input
10. RT: Oscillator Resistor
11. CT: Oscillator Capacitor
12. VOUT: Output Voltage

Functional Features

• Wide Input Voltage Range: The LT3973EDD-3.3#PBF can handle input voltages ranging from 2.7V to 60V, making it suitable for a variety of applications.
• High Efficiency: With an efficiency of up to 95%, this voltage regulator minimizes power losses and maximizes energy utilization.
• Compact Design: Operating at a high switching frequency of 2.2MHz allows for the use of smaller external components, enabling compact circuit designs.
• Internal Regulator: The device includes an internal regulator output (VCC) that can be used to power other components in the system.
• Enable and Synchronization: The EN/UVLO pin enables or disables the regulator, while the SYNC pin allows synchronization with an external clock source.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications.
• High efficiency reduces power consumption and extends battery life.
• Compact design due to high switching frequency.
• Internal regulator output provides additional power supply options.
• Enable and synchronization features enhance flexibility in system integration.

Disadvantages

• Limited maximum output current of 1A may not be sufficient for high-power applications.
• DFN-12 package may require specialized handling during assembly.

Working Principles

The LT3973EDD-3.3#PBF operates as a step-down (buck) voltage regulator. It takes an input voltage from the VIN pin and converts it to a stable 3.3V output voltage. The internal control circuitry adjusts the duty cycle of the switching transistor (SW pin) to regulate the output voltage. This switching action, combined with an inductor and capacitors, efficiently steps down the input voltage while minimizing power losses.

Detailed Application Field Plans

The LT3973EDD-3.3#PBF can be used in various applications, including but not limited to: - Battery-powered devices - Industrial