AN78L09ME1

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Fixed Output Voltage, Low Dropout Voltage, Small Package Size
• Package: TO-252, SOT-89
• Essence: Linear Voltage Regulator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 10V to 35V
• Output Voltage: 9V
• Output Current: 100mA
• Dropout Voltage: 2V (maximum)
• Quiescent Current: 5mA (maximum)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The AN78L09ME1 IC has three pins:

1. Pin 1: Input Voltage (VIN)
2. Pin 2: Ground (GND)
3. Pin 3: Output Voltage (VOUT)

Functional Features

• Fixed Output Voltage: The AN78L09ME1 provides a stable output voltage of 9V, regardless of input voltage fluctuations.
• Low Dropout Voltage: With a maximum dropout voltage of 2V, this regulator can maintain a stable output even when the input voltage is close to the desired output voltage.
• Small Package Size: The TO-252 and SOT-89 packages offer compact dimensions, making it suitable for space-constrained applications.

Advantages and Disadvantages

Advantages

• Simple to use: The AN78L09ME1 requires minimal external components for operation.
• Cost-effective: This voltage regulator offers a cost-effective solution for low-power applications.
• Reliable performance: It provides a stable output voltage with low dropout voltage.

Disadvantages

• Limited output current: The AN78L09ME1 is designed for low-current applications, with a maximum output current of 100mA.
• Limited input voltage range: It can only accept input voltages between 10V and 35V.

Working Principles

The AN78L09ME1 is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage, adjusting the pass transistor's resistance to maintain a constant output voltage.

Detailed Application Field Plans

The AN78L09ME1 is commonly used in various low-power applications, including:

1. Battery-powered devices: It can regulate the voltage for portable electronic devices such as calculators, remote controls, and small audio players.
2. Automotive electronics: The AN78L09ME1 is suitable for automotive applications where a stable voltage supply is required for sensors, actuators, and control modules.
3. Industrial equipment: It can be used in industrial automation systems, providing regulated voltage for sensors, signal conditioning circuits, and microcontrollers.

Detailed and Complete Alternative Models

1. LM7809: This is a popular alternative from Texas Instruments, offering similar specifications and functionality.
2. MC78L09: Manufactured by ON Semiconductor, it provides a fixed 9V output voltage with comparable characteristics to the AN78L09ME1.
3. UA78L09: Another alternative from Texas Instruments, featuring a TO-92 package and a maximum output current of 100mA.

Note: These alternative models should be evaluated based on specific application requirements before selection.

In conclusion, the AN78L09ME1 is a linear voltage regulator IC designed for low-power applications. With its fixed 9V output voltage, low dropout voltage, and compact package size, it offers a cost-effective and reliable solution for various electronic devices.