MAX6390LT29D4+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low Dropout Linear Regulator, 2.9V Fixed Output Voltage, SOT-23 Package, Ultra-Low Quiescent Current
• Package: SOT-23
• Essence: The MAX6390LT29D4+T is a low dropout linear regulator designed to provide a fixed output voltage of 2.9V with ultra-low quiescent current.
• Packaging/Quantity: The MAX6390LT29D4+T is available in a SOT-23 package and is typically sold in reels of 3000 units.

Specifications

• Input Voltage Range: 2.5V to 6.5V
• Output Voltage: 2.9V
• Dropout Voltage: 120mV at 100mA Load Current
• Quiescent Current: 1.5µA (typical)
• Load Regulation: ±0.05% (typical)
• Line Regulation: ±0.02% (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX6390LT29D4+T has three pins:

1. VIN - Input Voltage Pin
2. GND - Ground Pin
3. VOUT - Output Voltage Pin

Functional Features

• Low dropout voltage allows operation with small input-output differentials
• Ultra-low quiescent current extends battery life in portable applications
• Excellent load and line regulation ensures stable output voltage
• Thermal shutdown and current limit protection for enhanced reliability
• Small SOT-23 package enables space-constrained designs

Advantages and Disadvantages

Advantages

• Low dropout voltage enables efficient operation with small input-output differentials
• Ultra-low quiescent current extends battery life in portable devices
• Excellent load and line regulation ensures stable output voltage
• Thermal shutdown and current limit protection enhance reliability
• Small package size allows for space-constrained designs

Disadvantages

• Fixed output voltage may not be suitable for applications requiring adjustable voltage
• Limited input voltage range of 2.5V to 6.5V may restrict compatibility with certain systems

Working Principles

The MAX6390LT29D4+T is a low dropout linear regulator that regulates the output voltage by maintaining a constant voltage drop between the input and output terminals. It achieves this by using a pass transistor that adjusts its resistance to maintain the desired output voltage.

When the input voltage exceeds the desired output voltage plus the dropout voltage, the pass transistor remains fully on, allowing current to flow from the input to the output. As the input voltage decreases or the load current increases, the pass transistor adjusts its resistance to maintain a constant output voltage.

Detailed Application Field Plans

The MAX6390LT29D4+T is well-suited for various applications, including:

1. Battery-powered devices: The ultra-low quiescent current makes it ideal for extending battery life in portable electronics such as smartphones, tablets, and wearables.
2. IoT devices: With its small package size and low power consumption, the regulator can be used in IoT sensors, smart home devices, and other connected applications.
3. Industrial equipment: The excellent load and line regulation ensure stable power supply for industrial control systems, data loggers, and instrumentation devices.
4. Automotive electronics: The wide operating temperature range and thermal shutdown protection make it suitable for automotive applications like infotainment systems, lighting controls, and engine management units.

Detailed and Complete Alternative Models

1. MAX6391LT29D4+T: Similar to MAX6390LT29D4+T, but with a fixed output voltage of 2.9V and an extended input voltage range of 2.5V to 16V.
2. MAX6392LT29D4+T: Fixed output voltage of 2.9V, low dropout linear regulator with adjustable input voltage range from 2.5V to 6.5V.

These alternative models offer similar functionality and characteristics, providing flexibility for different application requirements.

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