LT1939EDD#TRPBF

Product Overview

Category

The LT1939EDD#TRPBF belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power management applications.

Characteristics

• High efficiency
• Low quiescent current
• Wide input voltage range
• Adjustable output voltage
• Overcurrent protection
• Thermal shutdown protection

Package

The LT1939EDD#TRPBF is available in a DFN (Dual Flat No-Lead) package.

Essence

The essence of the LT1939EDD#TRPBF is its ability to efficiently regulate and control power in various electronic devices.

Packaging/Quantity

The LT1939EDD#TRPBF is typically packaged in reels and comes in quantities of 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V to 36V
• Output Voltage Range: 0.8V to 24V
• Maximum Output Current: 3A
• Quiescent Current: 50µA
• Switching Frequency: 500kHz
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT1939EDD#TRPBF has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. FB: Feedback pin for output voltage regulation
4. EN: Enable pin for turning the IC on/off
5. SW: Switching node pin for connecting the external inductor
6. PGND: Power ground pin
7. VOUT: Output voltage pin

Functional Features

• Wide input voltage range allows for versatile applications
• Adjustable output voltage provides flexibility
• Overcurrent protection safeguards against excessive current flow
• Thermal shutdown protection prevents overheating
• Low quiescent current minimizes power consumption

Advantages and Disadvantages

Advantages

• High efficiency leads to energy savings
• Wide input voltage range enables compatibility with various power sources
• Adjustable output voltage accommodates different device requirements
• Overcurrent protection enhances system reliability
• Thermal shutdown protection prevents damage due to excessive heat

Disadvantages

• Limited maximum output current may restrict usage in high-power applications
• Higher cost compared to some alternative models

Working Principles

The LT1939EDD#TRPBF operates as a step-down (buck) switching regulator. It converts a higher input voltage to a lower output voltage by controlling the duty cycle of the internal switch. This regulation is achieved through feedback control, where the FB pin monitors the output voltage and adjusts the duty cycle accordingly.

Detailed Application Field Plans

The LT1939EDD#TRPBF finds application in various fields, including but not limited to: - Portable electronic devices - Industrial automation systems - Automotive electronics - Telecommunications equipment - Power supplies

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the LT1939EDD#TRPBF are: - LM2596S-ADJ - TPS54331RTER - ADP2303ARDZ

These models offer similar functionality and can be suitable replacements depending on specific requirements.

In conclusion, the LT1939EDD#TRPBF is a versatile integrated circuit used for power management applications. Its high efficiency, adjustable output voltage, and comprehensive protection features make it an excellent choice for various electronic devices. While it has limitations in terms of maximum output current and cost, there are alternative models available to suit different needs.