MAX6821RUK+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low Dropout, Low Quiescent Current
• Package: SOT-23-5
• Essence: Regulates voltage with low power consumption
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 6.5V
• Output Voltage Range: 1.25V to 5.5V
• Dropout Voltage: 120mV at 100mA
• Quiescent Current: 40µA
• Load Regulation: ±0.05% typical
• Line Regulation: ±0.02% typical
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX6821RUK+T is a five-pin device with the following pin configuration:

1. GND: Ground connection
2. FB: Feedback input for regulating output voltage
3. EN: Enable pin to turn the regulator on/off
4. VIN: Input voltage supply
5. VOUT: Regulated output voltage

Functional Features

• Low dropout voltage allows efficient regulation even with small input-output differentials.
• Low quiescent current ensures minimal power consumption during standby or idle states.
• Excellent load and line regulation provide stable output voltage under varying conditions.
• Enable pin allows easy control of the regulator's operation.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient voltage regulation. - Low quiescent current minimizes power consumption. - Small package size (SOT-23-5) facilitates space-constrained designs. - Wide operating temperature range allows usage in various environments.

Disadvantages: - Limited input voltage range (2.5V to 6.5V) may not be suitable for all applications. - Output voltage range (1.25V to 5.5V) may not meet the requirements of certain systems.

Working Principles

The MAX6821RUK+T is a voltage regulator that maintains a stable output voltage regardless of input voltage fluctuations. It achieves this by utilizing a feedback mechanism that compares the output voltage with a reference voltage. The regulator adjusts its internal circuitry to ensure the output voltage remains within the specified range.

When the enable pin (EN) is high, the regulator is active and regulates the output voltage according to the feedback input (FB). Conversely, when the enable pin is low, the regulator enters a low-power standby mode, reducing quiescent current consumption.

Detailed Application Field Plans

The MAX6821RUK+T finds applications in various electronic devices and systems, including but not limited to:

1. Battery-powered portable devices: Provides regulated voltage for microcontrollers, sensors, and other components.
2. IoT devices: Ensures stable power supply for wireless modules, sensors, and communication interfaces.
3. Automotive electronics: Regulates voltage for infotainment systems, lighting controls, and engine management units.
4. Industrial automation: Used in control systems, motor drives, and sensor interfaces.
5. Consumer electronics: Enables stable power delivery for audio/video equipment, gaming consoles, and home appliances.

Detailed and Complete Alternative Models

1. LM1117-3.3: Low dropout voltage regulator with fixed 3.3V output.
2. LT1763-5: Ultra-low dropout linear regulator with adjustable output voltage.
3. TPS79633: High-performance, low dropout voltage regulator with fixed 3.3V output.
4. ADP3339: Low dropout voltage regulator with adjustable output voltage and high accuracy.

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

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