MAX4987AETA+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-Efficiency Step-Down DC-DC Converter
• Package: 8-Pin TDFN (Thin Dual Flat No-Lead) Package
• Essence: Voltage Regulator
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 4.5V to 60V
• Output Voltage Range: 0.9V to 0.95 x VIN
• Maximum Output Current: 1.5A
• Switching Frequency: 500kHz
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The MAX4987AETA+T has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. FB: Feedback pin for output voltage regulation
4. EN: Enable pin for turning the device on/off
5. SS/TR: Soft-start/Tracking pin for controlling the startup behavior
6. LX: Switching node pin for connecting the inductor
7. PGND: Power ground pin
8. VOUT: Output voltage pin

Functional Features

• High efficiency conversion of input voltage to regulated output voltage
• Wide input voltage range allows for versatile applications
• Adjustable output voltage through feedback pin
• Soft-start feature for controlled startup behavior
• Enable pin for easy on/off control
• Overcurrent protection and thermal shutdown for enhanced safety

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption - Wide input voltage range enables compatibility with various power sources - Compact package size allows for space-saving designs - Overcurrent protection and thermal shutdown enhance system reliability

Disadvantages: - Limited maximum output current may not be suitable for high-power applications - Higher cost compared to non-integrated voltage regulators

Working Principles

The MAX4987AETA+T is a step-down DC-DC converter that utilizes a switching regulator topology. It takes an input voltage within the range of 4.5V to 60V and efficiently converts it to a regulated output voltage, which can be adjusted between 0.9V and 0.95 times the input voltage.

The device operates by rapidly switching an internal power transistor on and off at a high frequency of 500kHz. This allows for efficient energy transfer from the input to the output, minimizing power losses. The feedback pin (FB) is used to regulate the output voltage by comparing it to a reference voltage.

The soft-start feature (SS/TR) ensures a controlled startup behavior by gradually ramping up the output voltage when the device is enabled (EN). Overcurrent protection and thermal shutdown mechanisms are implemented to safeguard the device and the connected circuitry.

Detailed Application Field Plans

The MAX4987AETA+T is commonly used in various applications where efficient voltage regulation is required. Some typical application fields include:

1. Industrial Automation: Power management for control systems, motor drives, and sensors.
2. Automotive Electronics: Voltage regulation for automotive infotainment systems, lighting, and powertrain control modules.
3. Telecommunications: Power supply for network equipment, base stations, and communication devices.
4. Consumer Electronics: Voltage regulation for portable devices, home appliances, and audio/video equipment.
5. Renewable Energy: Power management for solar panels, wind turbines, and energy storage systems.

Detailed and Complete Alternative Models

1. LM2596S-ADJ: Step-Down DC-DC Converter with adjustable output voltage, 3A maximum output current.
2. LT1763-3.3: Low Dropout Regulator with fixed 3.3V output voltage, 500mA maximum output current.
3. TPS54331RTER: Synchronous Step-Down DC-DC Converter, 3A maximum output current.

These alternative models offer similar functionality and can be considered as substitutes for the MAX4987AETA+T in various applications.

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