MAX8722AEEG+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-efficiency, compact size, multiple functions
• Package: 16-pin TQFN
• Essence: Voltage Regulator and Battery Charger IC
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: 0.8V to 5.5V
• Maximum Output Current: 3A
• Switching Frequency: 1.2MHz
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX8722AEEG+T has a total of 16 pins. The pin configuration is as follows:

1. VIN: Input voltage pin
2. GND: Ground pin
3. EN: Enable pin
4. PGND: Power ground pin
5. LX: Inductor connection pin
6. BST: Boost capacitor connection pin
7. VOUT: Output voltage pin
8. FB: Feedback pin
9. SS/TRK: Soft-start/tracking pin
10. AGND: Analog ground pin
11. ILIM: Current limit setting pin
12. BAT: Battery connection pin
13. TS: Thermal shutdown pin
14. PROG: Programming pin
15. STAT: Status output pin
16. VCC: Supply voltage pin

Functional Features

• Integrated voltage regulator and battery charger in a single IC
• High efficiency, reducing power loss and heat generation
• Compact size, suitable for space-constrained applications
• Wide input voltage range allows for versatile usage
• Adjustable output voltage and current limit for flexibility
• Soft-start and tracking feature for smooth power-up sequence
• Thermal shutdown protection for safe operation

Advantages and Disadvantages

Advantages: - Integration of voltage regulator and battery charger reduces component count and board space - High efficiency results in longer battery life and reduced power consumption - Compact size enables use in small form factor devices - Wide input voltage range allows for compatibility with various power sources - Adjustable output voltage and current limit provide flexibility for different applications - Soft-start and tracking feature ensures smooth power-up sequence - Thermal shutdown protection prevents damage due to excessive heat

Disadvantages: - Limited maximum output current may not be suitable for high-power applications - Higher cost compared to individual voltage regulator and battery charger components - Requires careful thermal management to prevent overheating

Working Principles

The MAX8722AEEG+T combines a voltage regulator and battery charger into a single IC. It operates by converting the input voltage to a regulated output voltage while simultaneously charging the connected battery.

The IC uses a switching regulator topology to achieve high efficiency. It employs pulse-width modulation (PWM) techniques to control the duty cycle of the internal switches, regulating the output voltage. The switching frequency is set at 1.2MHz, providing fast response and reducing the size of external components.

The battery charging function utilizes a constant-current/constant-voltage (CC/CV) charging algorithm. It starts with a constant current mode to charge the battery rapidly until a predefined voltage threshold is reached. Then, it switches to a constant voltage mode to maintain the battery voltage at the desired level.

Detailed Application Field Plans

The MAX8722AEEG+T is widely used in various applications that require power management and battery charging. Some specific application fields include:

1. Portable Electronic Devices: Smartphones, tablets, portable media players
2. Wearable Devices: Smartwatches, fitness trackers, wireless earbuds
3. IoT Devices: Home automation systems, smart sensors, connected devices
4. Industrial Equipment: Handheld instruments, data loggers, measurement devices
5. Automotive Electronics: In-car infotainment systems, GPS trackers, dashcams

Detailed and Complete Alternative Models

1. MAX8722AEEG+:

   • Similar to MAX8722AEEG+T but without tape and reel packaging
   • Suitable for manual assembly or low-volume production

2. MAX8722AEEG/V+:

   • Variant with extended temperature range (-40°C to +125°C)
   • Designed for applications requiring higher operating temperatures

3. MAX8722AEEG/W+:

   • Variant with wider input voltage range (2.7V to 28V)
   • Ideal for applications with lower input voltage requirements

4. MAX8722AEEG/U+:

   • Variant with higher maximum output current (5A)
   • Suitable for power-hungry applications that require more current

These alternative models offer similar functionality to the MAX8722AEEG+T but may have specific features or specifications tailored to different application requirements.