MAX766EPA+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuits (ICs)

Use: The MAX766EPA+ is a voltage converter IC that provides a regulated negative voltage output. It is commonly used in electronic devices where a negative voltage supply is required.

Characteristics: - Input Voltage Range: 2.5V to 16V - Output Voltage Range: -1.25V to -15V - Output Current: Up to 50mA - Efficiency: Up to 90% - Operating Temperature Range: -40°C to +85°C

Package: The MAX766EPA+ is available in an 8-pin PDIP (Plastic Dual In-line Package) with a small footprint, making it suitable for space-constrained applications.

Essence: The essence of the MAX766EPA+ lies in its ability to generate a stable and regulated negative voltage output from a positive input voltage source.

Packaging/Quantity: The MAX766EPA+ is typically sold in reels or tubes, with 250 units per reel/tube.

Specifications

The specifications of the MAX766EPA+ are as follows:

• Input Voltage Range: 2.5V to 16V
• Output Voltage Range: -1.25V to -15V
• Output Current: Up to 50mA
• Quiescent Current: 200µA (typical)
• Shutdown Current: 0.01µA (typical)
• Switching Frequency: 100kHz (typical)
• Ripple Rejection: 70dB (typical)
• Load Regulation: 0.05% (typical)
• Line Regulation: 0.02% (typical)

Pin Configuration

The MAX766EPA+ has the following pin configuration:

1. GND (Ground)
2. SHDN (Shutdown)
3. FB (Feedback)
4. VOUT (Negative Voltage Output)
5. SW (Switch)
6. LX (Inductor Connection)
7. VIN (Positive Voltage Input)
8. VCC (Positive Supply Voltage)

Functional Features

The MAX766EPA+ offers the following functional features:

1. High Efficiency: With an efficiency of up to 90%, it minimizes power loss and maximizes battery life in portable devices.
2. Wide Input Voltage Range: It can accept input voltages ranging from 2.5V to 16V, making it versatile for various applications.
3. Low Quiescent Current: The quiescent current of only 200µA ensures minimal power consumption during standby or idle mode.
4. Shutdown Mode: The SHDN pin allows the IC to enter a low-power shutdown mode, reducing power consumption to as low as 0.01µA.
5. Short-Circuit Protection: The MAX766EPA+ incorporates short-circuit protection, safeguarding the IC and connected components from damage.

Advantages and Disadvantages

Advantages: - Efficient voltage conversion - Wide input voltage range - Low quiescent current - Shutdown mode for power saving - Short-circuit protection

Disadvantages: - Limited output current capacity (up to 50mA) - Requires external components for operation

Working Principles

The MAX766EPA+ operates on the principle of switched-capacitor voltage conversion. It utilizes an internal oscillator and switches to transfer energy between capacitors, resulting in a regulated negative voltage output. The feedback mechanism ensures the output voltage remains stable despite variations in input voltage and load conditions.

Application Field Plans

The MAX766EPA+ finds applications in various fields, including but not limited to: 1. Portable electronic devices requiring a negative voltage supply, such as smartphones, tablets, and portable media players. 2. Industrial control systems that require a regulated negative voltage for analog signal processing. 3. Automotive electronics, where negative voltage is needed for certain components or subsystems.

Alternative Models

For those seeking alternative options, the following models can be considered: - MAX764EPA+: Similar to MAX766EPA+, but with a fixed -5V output voltage. - MAX1684EUK+: A step-up DC-DC converter IC that provides positive voltage conversion.

These alternatives offer different output voltages or functionalities, catering to specific application requirements.

In conclusion, the MAX766EPA+ is a versatile voltage converter IC that efficiently generates a regulated negative voltage output. Its wide input voltage range, low quiescent current, and shutdown mode make it suitable for various portable and industrial applications. While it has limitations in terms of output current capacity, it offers essential features like short-circuit protection. The working principle involves switched-capacitor voltage conversion, ensuring stable output voltage. For alternative options, the MAX764EPA+ and MAX1684