MIC4681BM

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: High Efficiency, Low Dropout Voltage
• Package: SOIC-8
• Essence: Linear Regulator
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.7V to 16V
• Output Voltage Range: 1.25V to 13.5V
• Output Current: Up to 1A
• Dropout Voltage: 200mV at 1A
• Quiescent Current: 120µA
• Line Regulation: ±0.2%
• Load Regulation: ±0.4%
• Ripple Rejection: 70dB
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The MIC4681BM is an 8-pin IC with the following pin configuration:

1. GND (Ground)
2. IN (Input Voltage)
3. EN (Enable)
4. BYP (Bypass Capacitor)
5. FB (Feedback)
6. NC (No Connection)
7. OUT (Output Voltage)
8. VOUT (Output Voltage)

Functional Features

• High efficiency linear voltage regulator
• Low dropout voltage for improved performance
• Excellent line and load regulation
• Built-in thermal shutdown protection
• Short circuit current limit
• Fast transient response

Advantages

• Wide input voltage range allows for versatile applications
• Low dropout voltage minimizes power dissipation
• High efficiency reduces energy waste
• Compact SOIC-8 package saves board space
• Robust protection features ensure device reliability

Disadvantages

• Limited output current capability (up to 1A)
• Higher quiescent current compared to some alternatives
• Not suitable for high-power applications

Working Principles

The MIC4681BM is a linear voltage regulator that provides a stable output voltage regardless of input voltage fluctuations. It operates by using a pass transistor to regulate the output voltage based on a feedback mechanism. The device compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output.

Detailed Application Field Plans

The MIC4681BM is commonly used in various electronic devices and systems, including:

1. Battery-powered devices: Portable electronics, handheld instruments, etc.
2. Automotive applications: Infotainment systems, lighting controls, etc.
3. Industrial equipment: Sensors, control systems, etc.
4. Communication devices: Wireless routers, modems, etc.
5. Consumer electronics: Set-top boxes, gaming consoles, etc.

Detailed Alternative Models

1. LM1117-ADJ: Adjustable Linear Voltage Regulator, TO-220 package
2. LT1763-3.3: Low Dropout Linear Regulator, SOT-223 package
3. TPS7A4700: High-Voltage, Low-IQ Linear Regulator, VSON package
4. ADP3339: Ultralow Noise, High PSRR, RF Linear Regulator, SOT-23 package

These alternative models offer similar functionality and can be considered as substitutes for the MIC4681BM in different applications.

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