MAX8840ELT21+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: Low Dropout Linear Regulator
• Package: 6-Pin Thin SOT23
• Essence: Voltage Regulator
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Output Voltage Range: 1.8V to 3.3V
• Maximum Output Current: 150mA
• Dropout Voltage: 120mV at 100mA
• Quiescent Current: 40µA
• Line Regulation: ±0.05%/V
• Load Regulation: ±0.15%
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX8840ELT21+T has the following pin configuration:

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

Functional Features

• Low dropout voltage for efficient power conversion
• Wide input voltage range allows flexibility in power source selection
• Adjustable output voltage for various applications
• Low quiescent current for power-saving operation
• Excellent line and load regulation for stable output voltage
• Thermal shutdown and current limit protection for device safety

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient power conversion - Wide input voltage range provides flexibility in power source selection - Adjustable output voltage allows customization for different applications - Low quiescent current enables power-saving operation - Excellent line and load regulation ensures stable output voltage - Thermal shutdown and current limit protection enhance device safety

Disadvantages: - Limited maximum output current of 150mA may not be suitable for high-power applications - Only available in a 6-pin Thin SOT23 package, limiting compatibility with certain designs

Working Principles

The MAX8840ELT21+T is a low dropout linear regulator that regulates the input voltage to a desired output voltage. It utilizes a pass transistor to control the voltage drop across the regulator, ensuring a stable output voltage even when the input voltage varies. The feedback voltage (FB) pin is used to set the desired output voltage, which can be adjusted within the specified range. The enable control (EN) pin allows the regulator to be turned on or off as needed.

Detailed Application Field Plans

The MAX8840ELT21+T is commonly used in various battery-powered applications, such as portable devices, handheld instruments, and wireless communication devices. Its low dropout voltage and wide input voltage range make it suitable for systems powered by single-cell lithium-ion batteries or other low-voltage power sources. The adjustable output voltage allows customization for different components in the system, providing optimal power supply conditions.

Detailed and Complete Alternative Models

1. MAX8840ELT18+T: Similar to MAX8840ELT21+T but with an output voltage range of 1.2V to 1.8V.
2. MAX8840ELT25+T: Similar to MAX8840ELT21+T but with an output voltage range of 2.5V to 3.3V.
3. MAX8840ELT33+T: Similar to MAX8840ELT21+T but with an output voltage range of 3.0V to 3.3V.

These alternative models provide options for different output voltage requirements while maintaining similar characteristics and functionality to the MAX8840ELT21+T.

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