MAX8866TEUA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low-dropout (LDO) linear regulator, high efficiency, low quiescent current
• Package: 8-pin µMAX® package
• Essence: Provides regulated output voltage from an unregulated input voltage source
• Packaging/Quantity: Tape and reel packaging, 2500 units per reel

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Output Voltage Range: 1.2V to 3.3V
• Maximum Output Current: 150mA
• Dropout Voltage: 120mV at 100mA
• Quiescent Current: 40µA
• Line Regulation: 0.02%/V
• Load Regulation: 0.05%/mA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX8866TEUA has the following pin configuration:

```

---

| | --| VOUT GND|-- Pin 1: Ground --| VIN EN |-- Pin 2: Enable --| FB NC |-- Pin 3: No Connection --| NC VOUT|-- Pin 4: Output Voltage --| NC VIN |-- Pin 5: Input Voltage --| NC GND |-- Pin 6: Ground --| NC FB |-- Pin 7: Feedback --| NC NC |-- Pin 8: No Connection |___________| ```

Functional Features

• Low dropout voltage allows for efficient regulation even with small input-output differentials.
• High efficiency ensures minimal power dissipation and longer battery life.
• Low quiescent current reduces power consumption during standby or idle modes.
• Enable pin allows for easy on/off control of the regulator.
• Stable output voltage with low ripple and noise.

Advantages

• Wide input voltage range enables compatibility with various power sources.
• Small package size saves board space in compact designs.
• Excellent line and load regulation ensures stable output voltage under varying conditions.
• Low dropout voltage minimizes power loss and extends battery life.
• Low quiescent current prolongs battery operation in portable devices.

Disadvantages

• Limited maximum output current may not be suitable for high-power applications.
• Lack of adjustable output voltage limits flexibility in certain designs.
• Non-standard pin configuration may require additional attention during PCB layout.

Working Principles

The MAX8866TEUA 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, and adjusts the pass transistor accordingly to maintain a stable output voltage. The enable (EN) pin controls the regulator's on/off state.

Detailed Application Field Plans

The MAX8866TEUA is commonly used in battery-powered applications such as portable electronic devices, wireless communication systems, and industrial sensors. Its low dropout voltage and low quiescent current make it ideal for energy-efficient designs where battery life is critical. The stable output voltage and small package size also make it suitable for space-constrained applications.

Alternative Models

• MAX8866SEUA: Similar specifications and features, but in a different package (µMAX®)
• MAX8866REUA: Higher maximum output current (300mA), otherwise similar to MAX8866TEUA
• MAX8866YEUAT: Adjustable output voltage version of MAX8866TEUA

These alternative models provide options for different application requirements while maintaining similar functionality and characteristics.

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