MAX1651ESA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: High efficiency, low dropout voltage, small package size
• Package: SOIC-8
• Essence: Regulates input voltage to a desired output voltage level
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: 1.25V to 26V
• Maximum Output Current: 100mA
• Dropout Voltage: 120mV at 100mA
• Quiescent Current: 50µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX1651ESA has the following pin configuration:

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

Functional Features

• Low dropout voltage allows efficient regulation even with small input-output voltage differentials.
• Adjustable output voltage through external resistor divider connected to the feedback pin.
• Enable pin provides control over the regulator's operation.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - High efficiency - Small package size - Wide input voltage range - Low quiescent current

Disadvantages: - Limited maximum output current - Dropout voltage may be relatively high for some applications

Working Principles

The MAX1651ESA is a linear voltage regulator that uses a PNP pass transistor to regulate the output voltage. It operates by comparing the feedback voltage at the FB pin with a reference voltage. The regulator adjusts the pass transistor's conduction to maintain the desired output voltage level.

Detailed Application Field Plans

The MAX1651ESA is commonly used in various applications, including:

1. Battery-powered devices: Provides regulated voltage for portable electronics.
2. Automotive systems: Regulates voltage for automotive sensors and control modules.
3. Industrial equipment: Ensures stable power supply for industrial automation systems.
4. Communication devices: Used in routers, modems, and other network equipment.
5. Medical devices: Provides reliable voltage regulation for medical instruments.

Detailed and Complete Alternative Models

1. LM1117-ADJ: Adjustable linear voltage regulator with similar specifications.
2. LT1763-3.3: Low dropout voltage regulator with fixed 3.3V output.
3. TPS7A4700: High-current, low-dropout voltage regulator with adjustable output.

These alternative models offer similar functionality and can be considered as substitutes for the MAX1651ESA in different applications.

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