MAX8877EZK42+TGF4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: High Efficiency, Low Dropout, Low Quiescent Current
• Package: SOT23-5
• Essence: Power Management IC
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 6.5V
• Output Voltage: 4.2V
• Output Current: Up to 500mA
• Dropout Voltage: 120mV at 100mA
• Quiescent Current: 40µA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX8877EZK42+TGF4 is a 5-pin device with the following pin configuration:

1. GND: Ground connection
2. IN: Input voltage supply
3. EN: Enable pin for turning the regulator on/off
4. FB: Feedback pin for setting the output voltage
5. OUT: Output voltage

Functional Features

• High Efficiency: The MAX8877EZK42+TGF4 offers high efficiency, ensuring minimal power loss during voltage regulation.
• Low Dropout: With a low dropout voltage of only 120mV at 100mA, this voltage regulator can operate efficiently even when the input voltage is close to the desired output voltage.
• Low Quiescent Current: The quiescent current of 40µA ensures minimal power consumption when the regulator is in standby or idle mode.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced power dissipation.
• Low dropout voltage enables efficient operation with low input-output voltage differentials.
• Low quiescent current minimizes power consumption during standby.

Disadvantages

• Limited output current of up to 500mA may not be sufficient for high-power applications.
• SOT23-5 package may require additional thermal management for certain operating conditions.

Working Principles

The MAX8877EZK42+TGF4 is a voltage regulator that utilizes a linear regulation technique. It takes an input voltage within the range of 2.5V to 6.5V and provides a regulated output voltage of 4.2V. The regulator operates by comparing the feedback voltage (FB) with a reference voltage, adjusting the pass transistor to maintain the desired output voltage. The enable pin (EN) allows the user to turn the regulator on or off as needed.

Detailed Application Field Plans

The MAX8877EZK42+TGF4 is commonly used in various battery-powered applications, such as:

1. Portable electronic devices: Smartphones, tablets, and portable media players.
2. Wearable devices: Fitness trackers, smartwatches, and wireless earbuds.
3. IoT devices: Sensors, wireless modules, and low-power microcontrollers.
4. Medical devices: Blood glucose meters, insulin pumps, and portable diagnostic equipment.

Detailed and Complete Alternative Models

1. MAX8877EZK33+TGF4: Similar to MAX8877EZK42+TGF4 but with an output voltage of 3.3V.
2. MAX8877EZK50+TGF4: Similar to MAX8877EZK42+TGF4 but with an output voltage of 5.0V.
3. MAX8887EZK42+TGF4: Similar to MAX8877EZK42+TGF4 but with higher output current capability of up to 1A.

These alternative models offer similar features and characteristics, providing flexibility in choosing the appropriate voltage regulator for specific applications.

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