MAX1791EUB+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuits (ICs)

Use: The MAX1791EUB+ is a high-efficiency, step-down DC-DC converter designed for use in various electronic devices. It provides a regulated output voltage from a higher input voltage source.

Characteristics: - High efficiency - Step-down conversion - Regulated output voltage - Compact package - Low power consumption

Package: The MAX1791EUB+ is available in a small 10-pin µMAX package, which allows for easy integration into space-constrained designs.

Essence: The essence of the MAX1791EUB+ lies in its ability to efficiently convert higher input voltages to regulated lower output voltages, making it suitable for a wide range of applications.

Packaging/Quantity: The MAX1791EUB+ is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: 0.8V to 5.5V
• Maximum Output Current: 500mA
• Switching Frequency: 600kHz
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX1791EUB+ features the following pin configuration:

1. VIN: Input Voltage Pin
2. GND: Ground Pin
3. SW: Switching Node Pin
4. FB: Feedback Pin
5. EN: Enable Pin
6. SS/TR: Soft-Start/Tracking Pin
7. VOUT: Output Voltage Pin
8. PGND: Power Ground Pin
9. LX: Inductor Connection Pin
10. COMP: Compensation Pin

Functional Features

• High Efficiency: The MAX1791EUB+ incorporates a synchronous rectifier to minimize power losses, resulting in high conversion efficiency.
• Adjustable Output Voltage: The output voltage can be adjusted within the specified range using external resistors.
• Soft-Start Function: The soft-start feature ensures a controlled startup, preventing excessive inrush current and voltage overshoot.
• Enable Pin: The enable pin allows for easy on/off control of the converter.
• Overcurrent Protection: The MAX1791EUB+ includes overcurrent protection to safeguard against excessive load currents.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Compact package enables integration in space-constrained designs. - Wide input voltage range allows for versatile applications. - Adjustable output voltage provides flexibility. - Soft-start function prevents startup issues.

Disadvantages: - Limited maximum output current may not be suitable for high-power applications. - Synchronous rectification may introduce additional complexity in design.

Working Principles

The MAX1791EUB+ operates as a step-down DC-DC converter. It utilizes a pulse-width modulation (PWM) control scheme to regulate the output voltage. The input voltage is first stepped down by a power MOSFET switch and then filtered to provide a stable output voltage. The feedback mechanism continuously monitors the output voltage and adjusts the duty cycle of the PWM signal to maintain the desired output voltage.

Detailed Application Field Plans

The MAX1791EUB+ finds application in various electronic devices, including but not limited to: - Portable electronic devices - Battery-powered systems - Industrial equipment - Automotive electronics - Telecommunications equipment

Detailed and Complete Alternative Models

• MAX1791ESA+: Similar to MAX1791EUB+, but available in an 8-pin SOIC package.
• MAX1791EUA+: Similar to MAX1791EUB+, but available in a 8-pin µMAX package.
• MAX1791EPA+: Similar to MAX1791EUB+, but available in a 8-pin DIP package.

These alternative models offer similar functionality and characteristics, providing options for different packaging requirements or design considerations.

In conclusion, the MAX1791EUB+ is a high-efficiency step-down DC-DC converter with adjustable output voltage, suitable for various electronic devices. Its compact package, wide input voltage range, and other features make it a versatile choice for power conversion applications.

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