MAX1818EUT33-T

Product Overview

• Category: Voltage Regulator
• Use: Power management
• Characteristics: Low-dropout (LDO), fixed output voltage, small package size
• Package: SOT23-6
• Essence: Provides a regulated output voltage with low dropout voltage
• Packaging/Quantity: Tape and reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Output Voltage: 3.3V
• Output Current: Up to 150mA
• Dropout Voltage: 120mV at 100mA load
• Quiescent Current: 40µA typical
• Line Regulation: 0.02%/V
• Load Regulation: 0.1%/mA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX1818EUT33-T has the following pin configuration:

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1. IN: Input voltage
2. GND: Ground
3. FB: Feedback pin
4. EN: Enable pin
5. BYP: Bypass capacitor connection
6. OUT: Output voltage

Functional Features

• Low dropout voltage ensures efficient power conversion
• Fixed output voltage eliminates the need for external resistors
• Low quiescent current extends battery life
• Thermal shutdown protection prevents damage due to overheating
• Short-circuit and reverse-current protection enhance reliability

Advantages and Disadvantages

Advantages: - Small package size allows for space-constrained applications - Wide input voltage range provides flexibility in power supply selection - Low dropout voltage minimizes power dissipation - Excellent line and load regulation ensures stable output voltage

Disadvantages: - Limited output current may not be suitable for high-power applications - Fixed output voltage restricts flexibility in voltage selection

Working Principles

The MAX1818EUT33-T is a low-dropout voltage regulator that maintains a fixed output voltage of 3.3V, regardless of input voltage fluctuations. It achieves this by utilizing a pass transistor that adjusts its resistance to regulate the output voltage. The feedback pin (FB) monitors the output voltage and provides feedback to the internal control circuitry, which adjusts the pass transistor accordingly. This feedback loop ensures a stable output voltage even under varying load conditions.

Detailed Application Field Plans

The MAX1818EUT33-T finds applications in various fields, including:

1. Battery-powered devices: Provides regulated power supply for portable electronics such as smartphones, tablets, and wearables.
2. IoT devices: Enables efficient power management in Internet of Things (IoT) devices, ensuring reliable operation and extended battery life.
3. Industrial equipment: Suitable for powering sensors, actuators, and control circuits in industrial automation systems.
4. Automotive electronics: Used in automotive applications where a stable power supply is crucial for reliable operation of electronic components.

Detailed and Complete Alternative Models

1. MAX1818EUT25-T: Fixed output voltage of 2.5V
2. MAX1818EUT50-T: Fixed output voltage of 5.0V
3. MAX1818EUT12-T: Fixed output voltage of 12V

These alternative models provide different fixed output voltages to cater to specific application requirements.

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