MAX4842AEXT+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: Low-Voltage, High-Efficiency, Step-Up DC-DC Converter
• Package: 16-TQFN (4x4)
• Essence: The MAX4842AEXT+T is a compact and efficient step-up DC-DC converter designed for low-voltage applications.
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 1.8V to 5.5V
• Output Voltage Range: Up to 5.5V
• Switching Frequency: 1.2MHz
• Maximum Output Current: 200mA
• Efficiency: Up to 90%
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX4842AEXT+T has a 16-pin TQFN package with the following pin configuration:

1. VIN: Input Voltage
2. GND: Ground
3. SW: Switch Node
4. FB: Feedback Voltage
5. EN: Enable Pin
6. VOUT: Output Voltage
7. PGND: Power Ground
8. LX: Inductor Connection
9. LX: Inductor Connection
10. LX: Inductor Connection
11. LX: Inductor Connection
12. LX: Inductor Connection
13. LX: Inductor Connection
14. LX: Inductor Connection
15. LX: Inductor Connection
16. LX: Inductor Connection

Functional Features

• Step-up voltage conversion from low input voltage to higher output voltage.
• High efficiency operation for power-sensitive applications.
• Wide input voltage range allows compatibility with various power sources.
• Enable pin for easy control of the converter's operation.
• Compact package size for space-constrained designs.

Advantages and Disadvantages

Advantages

• High efficiency operation saves power and extends battery life.
• Wide input voltage range provides flexibility in power source selection.
• Compact package size allows for integration into small form factor devices.
• Enable pin enables easy control of the converter's operation.

Disadvantages

• Maximum output current limited to 200mA, may not be suitable for high-power applications.
• Operating temperature range limited to -40°C to +85°C, may not be suitable for extreme environments.

Working Principles

The MAX4842AEXT+T is a step-up DC-DC converter that utilizes a switching regulator to efficiently convert a low input voltage to a higher output voltage. It operates by rapidly switching an internal transistor on and off to control the flow of energy from the input to the output. This switching action allows for efficient voltage conversion with minimal power loss.

The converter's feedback mechanism continuously monitors the output voltage and adjusts the switching frequency to maintain a stable output. The enable pin provides control over the converter's operation, allowing it to be easily turned on or off as needed.

Detailed Application Field Plans

The MAX4842AEXT+T is well-suited for a variety of low-voltage applications that require step-up voltage conversion. Some potential application fields include:

1. Battery-powered devices: The converter can efficiently boost the voltage from a low-capacity battery to power various electronic components.
2. Portable electronics: Small form factor and high efficiency make it ideal for integration into portable devices such as smartphones, tablets, and wearables.
3. IoT devices: Enables efficient power management in low-power IoT devices that operate on limited power sources.
4. Industrial sensors: Provides voltage boosting capabilities for low-power sensors used in industrial monitoring and control systems.

Detailed and Complete Alternative Models

• MAX4842BEXT+T: Similar to the MAX4842AEXT+T, but with a higher maximum output current of 500mA.
• MAX4843AEXT+T: Step-up DC-DC converter with integrated power switch for simplified design and reduced external component count.
• MAX4844AEXT+T: Dual-output step-up DC-DC converter for applications requiring multiple voltage levels.

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

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