MAX1822ESA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics:
  • Low-dropout voltage regulator
  • Adjustable output voltage
  • Small package size
  • Low quiescent current
• Package: SOIC-8
• Essence: Provides regulated output voltage for various electronic devices
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage Range: 1.25V to 15V
• Dropout Voltage: 300mV at 100mA load
• Quiescent Current: 40µA
• Line Regulation: 0.05%/V
• Load Regulation: 0.1%/mA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX1822ESA has a standard SOIC-8 pin configuration:

1. GND: Ground connection
2. FB: Feedback pin for adjusting the output voltage
3. EN: Enable pin for turning the regulator on/off
4. VOUT: Regulated output voltage
5. NC: No Connection
6. NC: No Connection
7. VIN: Input voltage
8. GND: Ground connection

Functional Features

• Low dropout voltage ensures efficient regulation even with low input-output differentials.
• Adjustable output voltage allows customization for specific application requirements.
• Low quiescent current minimizes power consumption in standby mode.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Wide input voltage range enables compatibility with various power sources. - Small package size saves board space in compact designs. - Excellent line and load regulation ensures stable output voltage under varying conditions.

Disadvantages: - Limited maximum output current may not be suitable for high-power applications. - Lack of built-in overcurrent protection requires external circuitry for current limiting.

Working Principles

The MAX1822ESA is a low-dropout voltage regulator that maintains a stable output voltage despite fluctuations in the input voltage. It utilizes a PNP pass transistor to regulate the output voltage based on the feedback received from the FB pin. The adjustable output voltage is set by connecting external resistors to the FB pin. The EN pin allows the regulator to be turned on or off, conserving power when not needed. Thermal shutdown protection ensures safe operation by disabling the regulator during excessive temperature conditions.

Detailed Application Field Plans

The MAX1822ESA is commonly used in various electronic devices and systems, including:

1. Battery-powered devices: Provides regulated voltage for portable electronics such as smartphones, tablets, and wearable devices.
2. Industrial equipment: Ensures stable power supply for sensors, actuators, and control circuits in industrial automation systems.
3. Automotive applications: Regulates voltage for automotive electronics, including infotainment systems, lighting modules, and engine control units.
4. Communication systems: Used in routers, switches, and network equipment to maintain consistent power supply for reliable data transmission.
5. Medical devices: Provides regulated voltage for medical instruments, patient monitoring systems, and implantable devices.

Detailed and Complete Alternative Models

1. LM1117-ADJ: Adjustable voltage regulator with similar specifications and package size.
2. LT1763-3.3: Low dropout regulator with fixed 3.3V output voltage and small form factor.
3. TPS7A4700: Ultra-low dropout voltage regulator with adjustable output voltage and high output current capability.

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