LTC3448EMS8E#PBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Efficiency, Low Quiescent Current, Small Package Size
• Package: MSOP-8
• Essence: Voltage Regulator
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 1.8V to 5V
• Maximum Output Current: 400mA
• Quiescent Current: 20µA
• Switching Frequency: 1.5MHz
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LTC3448EMS8E#PBF has the following pin configuration:

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| | --| VIN GND |-- Pin 1 --| SW FB |-- Pin 2 --| EN VOUT|-- Pin 3 --| PG LX |-- Pin 4 |___________| ```

Functional Features

• High efficiency synchronous buck regulator
• Low quiescent current for extended battery life
• Wide input voltage range suitable for various applications
• Adjustable output voltage with high accuracy
• Internal soft-start limits inrush current during startup
• Overcurrent and overtemperature protection
• Power Good (PG) signal indicates output voltage within regulation

Advantages and Disadvantages

Advantages: - High efficiency operation reduces power dissipation - Small package size saves board space - Wide input voltage range allows flexibility in power supply design - Low quiescent current extends battery life - Overcurrent and overtemperature protection ensures device safety

Disadvantages: - Limited maximum output current (400mA) - Requires external components for operation

Working Principles

The LTC3448EMS8E#PBF is a high efficiency synchronous buck regulator. It takes an input voltage within the range of 2.7V to 5.5V and converts it to a regulated output voltage between 1.8V and 5V. The regulator operates at a switching frequency of 1.5MHz, allowing for smaller external components.

The device uses a synchronous rectification topology to achieve high efficiency. It employs a pulse width modulation (PWM) control scheme to regulate the output voltage. The internal soft-start feature limits the inrush current during startup, preventing excessive stress on the components.

The LTC3448EMS8E#PBF also incorporates overcurrent and overtemperature protection mechanisms to ensure safe operation. The Power Good (PG) signal indicates when the output voltage is within regulation, providing a convenient way to monitor the power supply status.

Detailed Application Field Plans

The LTC3448EMS8E#PBF is suitable for various applications that require efficient power management. Some potential application fields include:

1. Portable Electronics: The low quiescent current and wide input voltage range make it ideal for battery-powered devices such as smartphones, tablets, and portable media players.

2. IoT Devices: With its small package size and high efficiency, the LTC3448EMS8E#PBF can be used in IoT devices like smart sensors, wearables, and connected home appliances.

3. Industrial Equipment: The regulator's ability to operate in a wide temperature range (-40°C to 125°C) makes it suitable for industrial applications, including automation systems, control panels, and motor drives.

4. Automotive Electronics: The LTC3448EMS8E#PBF can be utilized in automotive electronics, such as infotainment systems, advanced driver-assistance systems (ADAS), and lighting control modules.

Detailed and Complete Alternative Models

1. LTC3448EMS8E#TRPBF: Similar to LTC3448EMS8E#PBF, but available in tape & reel packaging with 3000 units per reel.
2. LTC3448IMS8E#PBF: A variant of LTC3448EMS8E#PBF with a different input voltage range (2.7V to 4.5V) and maximum output current (600mA).
3. LTC3448HMS8E#PBF: Another alternative with a higher maximum output current (800mA) and extended temperature range (-40°C to 150°C).

These alternative models offer similar functionality and can be considered based on specific application requirements.

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