SA78AHE3/54

Product Overview

• Category: Electronic Component
• Use: Voltage Regulator
• Characteristics: High precision, low dropout voltage, low quiescent current
• Package: SOT-223
• Essence: Regulates voltage to a stable level
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.5V to 18V
• Output Voltage Range: 1.25V to 16V
• Output Current: 500mA
• Dropout Voltage: 300mV at 500mA
• Quiescent Current: 75µA
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

• Pin 1: Input
• Pin 2: Ground
• Pin 3: Output

Functional Features

• Voltage Regulation: Maintains a stable output voltage despite fluctuations in the input voltage.
• Low Dropout: Minimizes the voltage drop between the input and output, ensuring efficient operation.
• Low Quiescent Current: Consumes minimal current when in standby mode, conserving power.

Advantages

• Precision: Provides accurate and stable output voltage.
• Versatility: Wide input and output voltage ranges make it suitable for various applications.
• Efficiency: Low dropout voltage and quiescent current contribute to high efficiency.

Disadvantages

• Limited Output Current: Not suitable for high-current applications.
• Temperature Sensitivity: Performance may be affected at extreme temperatures.

Working Principles

The SA78AHE3/54 utilizes a feedback mechanism to adjust its internal circuitry, ensuring that the output voltage remains constant regardless of changes in the input voltage or load conditions. This is achieved through the use of a reference voltage and error amplifier, providing precise regulation.

Detailed Application Field Plans

• Battery-Powered Devices: Ideal for maintaining a stable voltage supply in portable electronics.
• Embedded Systems: Suitable for powering microcontrollers, sensors, and other low-power components.
• Automotive Electronics: Can be used in vehicle systems requiring reliable voltage regulation.

Detailed and Complete Alternative Models

• LM317: Offers similar voltage regulation capabilities with adjustable output.
• LT1763: Provides low dropout voltage and higher output current capacity.

In conclusion, the SA78AHE3/54 voltage regulator offers precise and efficient voltage regulation within a compact SOT-223 package, making it well-suited for a wide range of electronic applications.

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