MAX16999AUA25+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuits (ICs)

Use: The MAX16999AUA25+ is a voltage regulator IC designed for use in various electronic devices. It provides a stable output voltage to power different components within the device.

Characteristics: - Input Voltage Range: 4.5V to 60V - Output Voltage: 2.5V - Maximum Output Current: 1A - Package Type: MicroDFN-8 - Operating Temperature Range: -40°C to +125°C

Package and Quantity: The MAX16999AUA25+ is available in a MicroDFN-8 package. It is typically sold in reels or tubes containing multiple units.

Specifications

The MAX16999AUA25+ has the following specifications:

• Input Voltage Range: 4.5V to 60V
• Output Voltage: 2.5V
• Output Current: Up to 1A
• Dropout Voltage: 200mV at 500mA
• Quiescent Current: 50µA
• Line Regulation: ±0.05% (typical)
• Load Regulation: ±0.3% (typical)
• Ripple Rejection: 70dB at 1kHz
• Efficiency: Up to 95%
• Protection Features: Overcurrent, Overtemperature, Undervoltage Lockout

Pin Configuration

The MAX16999AUA25+ has a total of 8 pins arranged as follows:

```

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| | --| VIN GND |-- Pin 1: Ground --| EN FB |-- Pin 2: Feedback --| PG SW |-- Pin 3: Switch --| SS LX |-- Pin 4: Inductor Connection --| VOUT NC |-- Pin 5: No Connection --| NC |-- Pin 6: No Connection --| NC |-- Pin 7: No Connection --| NC |-- Pin 8: No Connection |___________| ```

Functional Features

The MAX16999AUA25+ offers the following functional features:

1. Wide Input Voltage Range: It can accept input voltages ranging from 4.5V to 60V, making it suitable for a wide range of applications.
2. Stable Output Voltage: The IC provides a regulated output voltage of 2.5V, ensuring consistent power supply to connected components.
3. Low Dropout Voltage: With a dropout voltage of only 200mV at 500mA, it minimizes power loss and improves efficiency.
4. Protection Mechanisms: The IC incorporates overcurrent, overtemperature, and undervoltage lockout protection, safeguarding the device and connected components.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for versatile application. - Stable output voltage ensures reliable operation of connected components. - Low dropout voltage minimizes power loss and improves efficiency. - Integrated protection features enhance device reliability.

Disadvantages: - Limited maximum output current of 1A may not be sufficient for high-power applications. - MicroDFN-8 package may require specialized handling during assembly.

Working Principles

The MAX16999AUA25+ operates as a step-down (buck) voltage regulator. It takes the higher input voltage and converts it to a stable 2.5V output voltage using an internal switching mechanism. This switching action allows for efficient power conversion while minimizing power dissipation.

The feedback pin (FB) monitors the output voltage and adjusts the duty cycle of the internal switch accordingly to maintain a constant output voltage. The enable pin (EN) controls the regulator's on/off state.

Application Field Plans

The MAX16999AUA25+ can be used in various applications, including but not limited to: - Automotive electronics - Industrial control systems - Power management modules - Battery-powered devices - Portable electronic devices

Alternative Models

Here are some alternative models that offer similar functionality to the MAX16999AUA25+:

1. TPS54325: Texas Instruments' buck converter with an input voltage range of 4.5V to 60V and a maximum output current of 3A.
2. LT1763: Linear Technology's low dropout voltage regulator with an input voltage range of 2.7V to 20V and a maximum output current of 500mA.
3. LM2596: National Semiconductor's step-down voltage regulator with an input voltage range of 4.5V to 40V and a maximum output current of 3A.

These alternatives provide options for different input voltage ranges, output currents, and package types, allowing designers to choose the most suitable solution for