MAX1745EUB+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuits (ICs)

Use: The MAX1745EUB+ is a step-up DC-DC converter designed for low-power applications. It provides a regulated output voltage from a single lithium-ion (Li+) cell, making it suitable for portable electronic devices.

Characteristics: - Input Voltage Range: 2.7V to 5.5V - Output Voltage Range: Up to 5.5V - Maximum Output Current: 100mA - Efficiency: Up to 90% - Low Quiescent Current: 8µA (typical) - Shutdown Current: 0.1µA (typical)

Package: The MAX1745EUB+ is available in a small SOT23-6 package, which offers space-saving advantages for compact designs.

Essence: This IC serves as a power management solution, enabling efficient voltage boosting for low-power devices operating from a single Li+ cell.

Packaging/Quantity: The MAX1745EUB+ is typically sold in reels of 3,000 units.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: Up to 5.5V
• Maximum Output Current: 100mA
• Quiescent Current: 8µA (typical)
• Shutdown Current: 0.1µA (typical)
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOT23-6

Detailed Pin Configuration

The MAX1745EUB+ features the following pin configuration:

1. VIN - Input Voltage Pin
2. GND - Ground Pin
3. SW - Switching Node Pin
4. FB - Feedback Voltage Pin
5. EN - Enable Pin
6. VOUT - Output Voltage Pin

Functional Features

• Efficiency: The MAX1745EUB+ offers high efficiency, up to 90%, ensuring minimal power loss during voltage conversion.
• Low Quiescent Current: With a typical quiescent current of 8µA, this IC minimizes power consumption in standby or idle modes.
• Shutdown Mode: The device can be put into a low-power shutdown mode by pulling the EN pin low, reducing the current consumption to as low as 0.1µA.
• Short-Circuit Protection: The MAX1745EUB+ incorporates short-circuit protection, safeguarding the device and load from excessive current.

Advantages and Disadvantages

Advantages: - Compact package size enables space-saving designs. - Wide input voltage range allows compatibility with various power sources. - High efficiency reduces power dissipation and extends battery life. - Low quiescent current minimizes power consumption during standby.

Disadvantages: - Limited maximum output current (100mA) may not be suitable for high-power applications. - Single Li+ cell input restricts usage to devices powered by such batteries.

Working Principles

The MAX1745EUB+ operates as a step-up DC-DC converter. It boosts the input voltage from a single Li+ cell to a regulated output voltage, which can be set up to 5.5V. The internal switching regulator efficiently converts the input voltage to the desired output level while maintaining high efficiency and low power consumption.

Detailed Application Field Plans

The MAX1745EUB+ finds application in various low-power portable electronic devices, including but not limited to: - Wearable devices - IoT sensors - Wireless communication modules - Portable medical devices - Handheld instruments

Detailed and Complete Alternative Models

1. MAX1724EZK+: Step-up DC-DC converter with a higher maximum output current of 300mA.
2. MAX1771ESA+: Step-up DC-DC converter with adjustable output voltage and higher efficiency.
3. MAX6190AESA+: Step-up DC-DC converter with an ultra-low quiescent current of 0.5µA.

These alternative models offer different specifications and features, providing flexibility for various application requirements.

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