MAX8845ZETC+ - English Editing Encyclopedia Entry

Product Overview

Category

The MAX8845ZETC+ belongs to the category of voltage regulators.

Use

This product is primarily used for voltage regulation in electronic circuits.

Characteristics

• The MAX8845ZETC+ is a high-performance voltage regulator with excellent efficiency.
• It offers low dropout voltage, making it suitable for applications with tight power supply requirements.
• This voltage regulator operates over a wide input voltage range, providing flexibility in various applications.
• It has a compact package, allowing for easy integration into circuit designs.
• The MAX8845ZETC+ exhibits low quiescent current, minimizing power consumption.

Package and Quantity

The MAX8845ZETC+ is available in a small-sized package, typically in a 6-pin SOT23 package. It is commonly sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: Adjustable from 0.8V to VIN
• Maximum Output Current: 500mA
• Dropout Voltage: 120mV at 100mA load
• Quiescent Current: 40µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX8845ZETC+ features the following pin configuration:

1. GND: Ground connection.
2. EN: Enable pin for turning the regulator on/off.
3. FB: Feedback pin for setting the output voltage.
4. VOUT: Output voltage pin.
5. VIN: Input voltage pin.
6. BYP: Bypass capacitor connection for improved stability.

Functional Features

• Low dropout voltage ensures efficient power conversion even with small input-output voltage differentials.
• Excellent line and load regulation characteristics provide stable output voltage under varying conditions.
• Built-in thermal shutdown and current limit protection mechanisms safeguard the regulator and connected components.
• The enable pin allows for easy control of the regulator's operation, enabling power-saving modes when not required.

Advantages and Disadvantages

Advantages

• High efficiency and low dropout voltage.
• Wide input voltage range.
• Compact package size.
• Low quiescent current consumption.

Disadvantages

• Limited maximum output current (500mA).
• Requires external bypass capacitor for improved stability.

Working Principles

The MAX8845ZETC+ is a linear voltage regulator that utilizes a pass transistor to regulate the output voltage. It operates by comparing the feedback voltage (FB) with a reference voltage to adjust the pass transistor's resistance. This adjustment ensures that the output voltage remains constant despite variations in the input voltage or load conditions.

Detailed Application Field Plans

The MAX8845ZETC+ finds applications in various electronic devices and systems, including but not limited to: - Battery-powered portable devices - Wireless communication modules - Industrial control systems - Automotive electronics - Medical equipment

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with similar specifications and pin configuration.
2. LT1763: Offers higher maximum output current and lower dropout voltage.
3. TPS7A4700: Provides adjustable output voltage and higher input voltage range.

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

In conclusion, the MAX8845ZETC+ is a high-performance voltage regulator suitable for a wide range of applications. Its compact size, low dropout voltage, and excellent efficiency make it an ideal choice for power supply designs requiring precise voltage regulation.