MAX6389LT46D3+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage regulator
• Characteristics: Low dropout, low quiescent current, adjustable output voltage
• Package: 6-pin SOT-23
• Essence: Regulates input voltage to a stable output voltage
• Packaging/Quantity: Tape and reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 6.5V
• Output Voltage Range: 1.2V to 5.5V
• Dropout Voltage: 120mV at 100mA load
• Quiescent Current: 20µA
• Load Regulation: ±0.05% typical
• Line Regulation: ±0.02% typical
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX6389LT46D3+T has the following pin configuration:

1. GND: Ground connection
2. FB: Feedback pin for adjusting the output voltage
3. EN: Enable pin for turning the regulator on/off
4. NC: No connection
5. VOUT: Output voltage pin
6. VIN: Input voltage pin

Functional Features

• Low dropout voltage ensures efficient regulation even with small input-output voltage differentials.
• Low quiescent current minimizes power consumption in standby or idle modes.
• Adjustable output voltage allows flexibility in various applications.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Wide input voltage range enables compatibility with different power sources. - Small package size saves board space in compact designs. - Excellent load and line regulation provide stable output voltage. - Low quiescent current extends battery life in portable devices.

Disadvantages: - Limited maximum output current may restrict usage in high-power applications. - Sensitive to input voltage fluctuations, requiring additional filtering components.

Working Principles

The MAX6389LT46D3+T is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the feedback voltage (FB) with an internal reference voltage. The error amplifier adjusts the pass transistor to maintain the desired output voltage. The enable pin (EN) allows the regulator to be turned on or off, conserving power when not needed. Thermal shutdown protection ensures safe operation by disabling the regulator during excessive temperature conditions.

Detailed Application Field Plans

1. Battery-powered devices: The low dropout voltage and quiescent current make it suitable for portable electronics such as smartphones, tablets, and wearables.
2. Automotive applications: The wide input voltage range and thermal shutdown protection make it ideal for automotive systems, including infotainment systems and lighting controls.
3. Industrial equipment: The stable output voltage and small package size make it suitable for various industrial applications, such as sensors, actuators, and control systems.

Detailed and Complete Alternative Models

1. LM1117-ADJ: Adjustable voltage regulator with similar specifications and package.
2. LT1763-3.3: Fixed 3.3V voltage regulator with low dropout and small package.
3. MCP1700-3302E/TO: Low quiescent current, fixed 3.3V voltage regulator in a TO-92 package.

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