MAX1791EUB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-Efficiency Step-Down DC-DC Converter
• Package: µMAX®
• Essence: Regulates voltage efficiently in electronic devices
• Packaging/Quantity: Tube/100 pieces

Specifications

• Input Voltage Range: 2.7V to 11V
• Output Voltage Range: 0.8V to VIN
• Maximum Output Current: 500mA
• Switching Frequency: 1MHz
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX1791EUB has the following pin configuration:

1. GND: Ground connection
2. SW: Switching node for the internal MOSFET
3. FB: Feedback input for regulating the output voltage
4. EN: Enable pin to turn the device on/off
5. LX: Inductor connection
6. VCC: Supply voltage input

Functional Features

• High efficiency and low quiescent current
• Internal synchronous rectification for improved efficiency
• Adjustable output voltage through external resistors
• Soft-start feature to reduce inrush current
• Overcurrent and thermal shutdown protection
• Low dropout voltage for extended battery life

Advantages

• Compact package size allows for space-saving designs
• Wide input voltage range enables versatile applications
• High efficiency reduces power dissipation and extends battery life
• Adjustable output voltage accommodates various system requirements
• Comprehensive protection features enhance reliability

Disadvantages

• Limited maximum output current may restrict certain high-power applications
• Higher cost compared to non-integrated solutions
• Requires external components for operation, increasing complexity

Working Principles

The MAX1791EUB is a step-down DC-DC converter that utilizes a high-frequency switching regulator to efficiently convert input voltage to a lower output voltage. It employs pulse-width modulation (PWM) to control the duty cycle of the internal MOSFET, regulating the output voltage according to the feedback signal received at the FB pin. The device operates in continuous conduction mode (CCM), ensuring smooth and stable power delivery.

Detailed Application Field Plans

The MAX1791EUB is commonly used in various applications, including:

1. Battery-powered devices: Portable electronics, handheld instruments, and wireless communication devices benefit from its high efficiency and low quiescent current.
2. Industrial equipment: Control systems, sensors, and actuators can be powered efficiently using the MAX1791EUB.
3. Automotive electronics: On-board systems, infotainment units, and lighting modules can take advantage of its wide input voltage range and protection features.
4. IoT devices: Smart home devices, wearables, and sensor networks can be powered reliably with the MAX1791EUB.

Detailed and Complete Alternative Models

• MAX1792EUB: Similar specifications but with higher maximum output current (800mA)
• MAX1793EUB: Similar specifications but with adjustable frequency for noise-sensitive applications
• MAX1794EUB: Similar specifications but with integrated power-on reset (POR) function

(Note: These alternative models are part of the same product family and offer similar functionality with slight variations.)

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