MAX1544ETL+T

Product Overview

• Category: Integrated Circuits (ICs)
• Use: Power Management
• Characteristics: High-Efficiency, Low-Power, Step-Up DC-DC Converter
• Package: 6-WLP (1.5x2mm)
• Essence: Voltage Regulator
• Packaging/Quantity: Tape & Reel (3000 pieces per reel)

Specifications

The MAX1544ETL+T is a high-efficiency, low-power, step-up DC-DC converter integrated circuit. It is designed to provide a regulated output voltage from a single-cell Li+ battery or other power sources. The device operates with a wide input voltage range and offers excellent efficiency, making it suitable for various portable applications.

Key specifications of the MAX1544ETL+T include:

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: Up to 5.25V
• Maximum Output Current: 200mA
• Quiescent Current: 8µA (typical)
• Switching Frequency: 1.2MHz (typical)
• Shutdown Current: <1µA

Pin Configuration

The MAX1544ETL+T features a 6-WLP package with the following pin configuration:

1. VIN - Input Voltage
2. GND - Ground
3. LX - Inductor Connection
4. FB - Feedback Voltage
5. EN - Enable Control
6. VOUT - Output Voltage

Functional Features

The MAX1544ETL+T offers several functional features that enhance its performance and usability:

1. High Efficiency: The device incorporates a high-efficiency synchronous rectifier, minimizing power losses and maximizing battery life.
2. Low Quiescent Current: With a typical quiescent current of only 8µA, the MAX1544ETL+T minimizes power consumption during standby or idle modes.
3. Soft-Start Function: The integrated soft-start feature prevents excessive inrush current during startup, protecting the device and the connected components.
4. Overcurrent Protection: The MAX1544ETL+T includes overcurrent protection to safeguard against excessive load currents, ensuring safe operation.

Advantages and Disadvantages

Advantages of the MAX1544ETL+T:

• High efficiency results in longer battery life.
• Low quiescent current reduces power consumption during idle periods.
• Small package size enables compact designs.
• Integrated features simplify circuit design and reduce external component count.

Disadvantages of the MAX1544ETL+T:

• Limited maximum output current may not be suitable for high-power applications.
• Input voltage range is restricted to 2.7V to 5.5V.

Working Principles

The MAX1544ETL+T operates as a step-up DC-DC converter, converting a low input voltage to a higher regulated output voltage. It utilizes a pulse-width modulation (PWM) control scheme to regulate the output voltage. The internal synchronous rectifier ensures high efficiency by minimizing power losses.

When enabled, the device starts switching at a fixed frequency determined by an internal oscillator. The feedback voltage (FB) pin monitors the output voltage and adjusts the duty cycle of the internal switch to maintain a stable output voltage. The soft-start function gradually ramps up the output voltage to prevent excessive inrush current.

Application Field Plans

The MAX1544ETL+T finds application in various portable electronic devices that require efficient power management. Some potential application fields include:

1. Battery-Powered Devices: Portable audio players, handheld gaming consoles, and digital cameras can benefit from the MAX1544ETL+T's high efficiency and low power consumption.
2. Wearable Electronics: Smartwatches, fitness trackers, and other wearable devices can utilize the compact size and low quiescent current of the MAX1544ETL+T.
3. IoT Devices: Battery-powered sensors, wireless modules, and IoT edge devices can be powered efficiently using the MAX1544ETL+T.

Alternative Models

In addition to the MAX1544ETL+T, there are alternative models available that offer similar functionality. Some notable alternatives include:

1. MAX17222: A high-efficiency, low-power, step-up DC-DC converter with a higher maximum output current of 500mA.
2. MAX6190: A low-power, step-up DC-DC converter with an adjustable output voltage range.
3. MAX756: A high-efficiency, low-power, step-up DC-DC converter with an integrated power switch.

These alternative models provide flexibility in choosing the most suitable solution based on specific application requirements.

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