AS1390B-BSOT

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Adjustable output voltage - Thermal shutdown protection - Short circuit protection

Package: BSOT (Bipolar Small Outline Transistor)

Essence: AS1390B-BSOT is a voltage regulator IC that provides stable and regulated output voltage for various electronic devices.

Packaging/Quantity: The AS1390B-BSOT is available in a BSOT package and is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 2.5V to 6.5V
• Output Voltage Range: 1.2V to 5.5V
• Dropout Voltage: 200mV (typical)
• Output Current: Up to 500mA
• Quiescent Current: 75µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The AS1390B-BSOT has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. VOUT: Output voltage pin
4. ADJ: Adjustable pin for setting the output voltage

Functional Features

• Low Dropout Voltage: The AS1390B-BSOT exhibits a low dropout voltage, ensuring efficient power conversion even when the input voltage is close to the desired output voltage.
• High Output Current Capability: With a maximum output current of 500mA, this voltage regulator can handle the power requirements of a wide range of electronic devices.
• Adjustable Output Voltage: The ADJ pin allows users to set the desired output voltage within the specified range, providing flexibility in different applications.
• Thermal Shutdown Protection: The IC incorporates thermal shutdown protection, which prevents damage due to excessive temperature.
• Short Circuit Protection: The AS1390B-BSOT includes short circuit protection, safeguarding the device and connected components from potential damage.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient power conversion - High output current capability for various applications - Adjustable output voltage provides flexibility - Thermal shutdown and short circuit protection enhance reliability

Disadvantages: - Limited input voltage range (2.5V to 6.5V) - Quiescent current may be relatively high compared to some other voltage regulators

Working Principles

The AS1390B-BSOT operates as a linear voltage regulator. It regulates the output voltage by maintaining a constant voltage drop across its internal pass transistor. The adjustable pin (ADJ) allows users to set the desired output voltage within the specified range. The IC continuously monitors the input and output voltages, adjusting the pass transistor to maintain a stable output voltage despite variations in the input voltage or load conditions.

Detailed Application Field Plans

The AS1390B-BSOT is widely used in various electronic devices and systems that require a stable and regulated power supply. Some common application fields include:

1. Mobile Devices: Smartphones, tablets, portable media players
2. Consumer Electronics: Digital cameras, portable gaming consoles
3. Computer Peripherals: USB hubs, external hard drives
4. Industrial Equipment: Sensors, control systems
5. Automotive Electronics: Infotainment systems, navigation devices

Detailed and Complete Alternative Models

1. AS1391B-BSOT: Similar to AS1390B-BSOT with extended input voltage range (up to 16V)
2. AS1392B-BSOT: Higher output current capability (up to 1A) with similar features
3. AS1393B-BSOT: Fixed output voltage variant with lower quiescent current

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

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