MAX8877EZK28+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low Dropout, High Efficiency
• 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: 2.8V
• Output Current: Up to 500mA
• Dropout Voltage: 120mV at 100mA
• Quiescent Current: 40µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX8877EZK28+T has a total of 5 pins:

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

• Low dropout voltage allows efficient regulation even with small input-output differentials.
• High efficiency ensures minimal power dissipation.
• Built-in thermal shutdown and current limit protection.
• Low quiescent current extends battery life in portable applications.
• Fast transient response for stable operation during load changes.

Advantages and Disadvantages

Advantages: - Compact SOT23-5 package suitable for space-constrained designs. - Wide input voltage range enables compatibility with various power sources. - Excellent line and load regulation for reliable performance. - Robust protection features enhance system reliability.

Disadvantages: - Limited output current may not be sufficient for high-power applications. - Fixed output voltage limits flexibility in certain scenarios.

Working Principles

The MAX8877EZK28+T is a low dropout voltage regulator designed to provide a stable output voltage of 2.8V from an input voltage range of 2.5V to 6.5V. It utilizes a PNP pass transistor architecture to achieve low dropout voltage and high efficiency.

The regulator operates by comparing the feedback voltage (FB) with a reference voltage, which sets the desired output voltage. The enable pin (EN) controls the regulator's on/off state. When enabled, the internal circuitry regulates the output voltage by adjusting the pass transistor's resistance.

The device incorporates thermal shutdown and current limit protection mechanisms to safeguard against excessive temperature and current conditions. These features ensure reliable operation and protect the IC and surrounding components.

Detailed Application Field Plans

The MAX8877EZK28+T is commonly used in various applications, including but not limited to:

1. Battery-powered devices: Portable electronics, handheld instruments, and wireless communication devices benefit from its low quiescent current and efficient power management capabilities.
2. IoT devices: Internet of Things (IoT) sensors, modules, and wearable devices can utilize this regulator for stable and efficient power supply.
3. Automotive electronics: The wide input voltage range and robust protection features make it suitable for automotive applications such as infotainment systems, lighting control, and sensor modules.
4. Industrial equipment: Control systems, motor drives, and instrumentation devices can benefit from the regulator's reliable voltage regulation and protection features.

Detailed and Complete Alternative Models

1. MAX8887EZK28+T: Similar to MAX8877EZK28+T, but with an adjustable output voltage.
2. MAX8867EZK28+T: Low dropout voltage regulator with a fixed 2.8V output voltage, but in a different package (SOT23-6).
3. MAX8897EZK28+T: Higher output current variant (up to 1A) with a fixed 2.8V output voltage, suitable for more demanding applications.

These alternative models offer similar functionality and characteristics, providing options based on specific design requirements.

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