MAX8878EUK33+T

Product Overview

• Category: Voltage Regulator
• Use: Power management
• Characteristics: Low-dropout linear regulator, low quiescent current, high output current capability
• Package: SOT23-5
• Essence: Provides a regulated output voltage with low dropout voltage and high output current capability
• Packaging/Quantity: Tape and reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 6.5V
• Output Voltage: 3.3V
• Output Current: Up to 150mA
• Dropout Voltage: 120mV at 100mA load
• Quiescent Current: 40µA (typical)
• Line Regulation: ±0.05% (typical)
• Load Regulation: ±0.1% (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX8878EUK33+T has the following pin configuration:

```

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| | --| |-- VIN --| |-- GND --| |-- EN --| |-- FB |____| ```

• VIN: Input voltage
• GND: Ground
• EN: Enable pin
• FB: Feedback pin

Functional Features

• Low dropout voltage: The MAX8878EUK33+T provides a regulated output voltage even when the input voltage is close to the desired output voltage.
• Low quiescent current: The device consumes minimal current when in standby mode, resulting in increased battery life.
• High output current capability: With an output current of up to 150mA, the MAX8878EUK33+T can power a wide range of devices.

Advantages and Disadvantages

Advantages

• Low dropout voltage ensures stable output even with low input voltage.
• Low quiescent current extends battery life.
• High output current capability allows for powering various devices.

Disadvantages

• Limited output current compared to higher-capacity regulators.
• SOT23-5 package may require surface mount soldering expertise.

Working Principles

The MAX8878EUK33+T is a low-dropout linear regulator that uses a PNP pass transistor to regulate the output voltage. It operates by comparing the feedback voltage (FB) with a reference voltage, adjusting the pass transistor's resistance to maintain a stable output voltage. The enable pin (EN) controls the device's on/off state.

Detailed Application Field Plans

The MAX8878EUK33+T is commonly used in applications where a stable and regulated 3.3V power supply is required. Some typical application fields include:

1. Battery-powered devices: The low quiescent current and high output current capability make it suitable for portable electronics such as smartphones, tablets, and wearable devices.
2. IoT devices: With its small form factor and low power consumption, the MAX8878EUK33+T is ideal for powering sensors, microcontrollers, and communication modules in IoT applications.
3. Industrial equipment: The regulator can be used in various industrial control systems, providing reliable power for sensors, actuators, and other components.

Detailed and Complete Alternative Models

• MAX8887: Similar to the MAX8878EUK33+T, but with an adjustable output voltage.
• MIC5205: Low-dropout linear regulator with adjustable output voltage and higher output current capability.
• TPS79633: Another low-dropout linear regulator with fixed 3.3V output voltage and higher output current capability.

These alternative models offer similar functionality and can be considered as substitutes for the MAX8878EUK33+T, depending on specific requirements.

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