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MAX8738EUA+T
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MAX8738EUA+T

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High-efficiency, low-power, step-down DC-DC converter
  • Package: 8-pin µMAX® package
  • Essence: Voltage regulator and controller
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 4.5V to 28V
  • Output Voltage Range: 0.6V to 5.5V
  • Maximum Output Current: 2A
  • Switching Frequency: 1MHz
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX8738EUA+T has the following pin configuration:

  1. VIN: Input voltage pin
  2. GND: Ground pin
  3. FB: Feedback pin for output voltage regulation
  4. EN: Enable pin for turning the device on/off
  5. SS/TR: Soft-start/Tracking pin for controlling start-up time and tracking external voltage
  6. LX: Switching node pin for connecting the inductor
  7. PGND: Power ground pin
  8. VOUT: Output voltage pin

Functional Features

  • High efficiency: The MAX8738EUA+T offers high conversion efficiency, minimizing power loss.
  • Low-power operation: It operates with low quiescent current, reducing overall power consumption.
  • Step-down DC-DC converter: It converts a higher input voltage to a lower output voltage efficiently.
  • Adjustable output voltage: The output voltage can be adjusted within a specified range using an external resistor divider network.
  • Overcurrent protection: The device incorporates overcurrent protection to safeguard against excessive load currents.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power dissipation. - Wide input voltage range allows for versatile applications. - Compact package size enables space-saving designs. - Overcurrent protection enhances system reliability.

Disadvantages: - Limited maximum output current may restrict certain high-power applications. - Requires external components for proper operation, increasing overall system complexity.

Working Principles

The MAX8738EUA+T is a step-down DC-DC converter that utilizes pulse-width modulation (PWM) to regulate the output voltage. It operates by switching the input voltage on and off rapidly, controlling the duty cycle to maintain the desired output voltage. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle accordingly. The soft-start/Tracking pin (SS/TR) controls the start-up time and can be used to track an external voltage source during power-up.

Detailed Application Field Plans

The MAX8738EUA+T finds applications in various fields, including:

  1. Portable electronic devices: It provides efficient power management for battery-powered devices such as smartphones, tablets, and portable media players.
  2. Industrial equipment: It can be used in industrial control systems, automation equipment, and instrumentation, ensuring stable and reliable power supply.
  3. Automotive electronics: It is suitable for automotive applications like infotainment systems, advanced driver-assistance systems (ADAS), and lighting control modules.
  4. Telecommunications: It supports power management in telecom infrastructure equipment, routers, switches, and base stations.

Detailed and Complete Alternative Models

  1. MAX8739ETI+: Similar to MAX8738EUA+T but available in a 28-pin TQFN package.
  2. MAX17503GTL+: Step-down DC-DC converter with higher output current capability (up to 3A).
  3. MAX15062ATB+: Integrated power management IC with multiple voltage regulators and additional features.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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技術ソリューションにおける MAX8738EUA+T の適用に関連する 10 件の一般的な質問と回答をリストします。

Sure! Here are 10 common questions and answers related to the application of MAX8738EUA+T in technical solutions:

  1. Q: What is the MAX8738EUA+T? A: The MAX8738EUA+T is a highly integrated power management IC (PMIC) designed for use in portable devices.

  2. Q: What are the key features of the MAX8738EUA+T? A: The key features include multiple voltage regulators, battery charger, power sequencing, and protection circuits.

  3. Q: What is the input voltage range supported by the MAX8738EUA+T? A: The input voltage range is typically between 2.7V and 5.5V.

  4. Q: How many voltage regulators are there in the MAX8738EUA+T? A: The MAX8738EUA+T has three high-efficiency step-down converters and one low-dropout (LDO) linear regulator.

  5. Q: Can the MAX8738EUA+T charge a single-cell Li-ion battery? A: Yes, it can charge a single-cell Li-ion or Li-polymer battery with a charging current up to 1.2A.

  6. Q: Does the MAX8738EUA+T provide overvoltage and overcurrent protection? A: Yes, it includes overvoltage protection (OVP), undervoltage lockout (UVLO), and overcurrent protection (OCP) features.

  7. Q: What is the maximum output current of the LDO regulator in the MAX8738EUA+T? A: The LDO regulator can provide a maximum output current of 150mA.

  8. Q: Can the MAX8738EUA+T operate in a low-power mode? A: Yes, it supports a low-power mode with reduced quiescent current to optimize battery life.

  9. Q: Is the MAX8738EUA+T suitable for use in portable devices like smartphones and tablets? A: Yes, it is specifically designed for use in portable devices where space and power efficiency are critical.

  10. Q: Are there any evaluation boards or reference designs available for the MAX8738EUA+T? A: Yes, Maxim Integrated provides evaluation kits and reference designs to help developers quickly prototype and integrate the MAX8738EUA+T into their applications.

Please note that these questions and answers are general and may vary depending on specific application requirements. It's always recommended to refer to the datasheet and application notes provided by the manufacturer for detailed information.