MAX4657EUA+

Interface - Analog Switches, Multiplexers, Demultiplexers

The MAX4657EUA+ is an automotive-grade, dual, single-pole/throw (SPST) analog switch. This analog switch is designed to operate from a single +2.7V to +5.5V supply and features a high-voltage rail-to-rail signal handling. It is optimized for low on-resistance. Typical on-resistance is typically ≤ 0.4Ω, ensuring high-bandwidth signal-handling performance and low power dissipation. The MAX4657EUA+ is rated at 10A continuous current carrying capability, making it suitable for high-current switching applications such as power rails. The high-voltage, rail-to-rail signal handling of the MAX4657EUA+ supports full power rail operation with rail-to-rail signal handling without crossover distortion.

The MAX4657EUA+ also features an integrated charge pump that supplies the +1V gate voltage required by the switches in the circuit. The +1V gate-to-source voltage allows increased signal handling performance compared to external gate-drive and control ICs. The charge pump is integrated into the MAX4657EUA+ and requires no external components.

The MAX4657EUA+ is designed to operate over an automotive temperature range of –40°C to +125°C. The device is available in two versions – a commercial (K) version, and an automotive (A) version. Both versions offer the same features and performance, with the only difference being a maximum supply voltage of 5.5V for the commercial version, and 15V for the automotive version. The MAX4657EUA+ is featured in a 6-pin SOT-23 package and is offered in tape and reel for automated manufacturing.

Applications

The MAX4657EUA+ is ideal for use in automotive applications, as well as in industrial, medical and consumer electronics applications. The MAX4657EUA+ is available for use in systems ranging from low-power, low-voltage supply to high-current, and high-voltage supply applications. Some specific applications include:

• Automotive infotainment systems
• Industrial and medical instrumentation
• Automotive and consumer linear and switch-mode power supplies
• High-current power controllers
• Hi-fi and studio amplifiers
• Headphones

Working Principle

The MAX4657EUA+ is an analog switch with two SPST switches housed in a single package. The switches have a low on-resistance of typically ≤0.4Ω, ensuring high-bandwidth signal handling performance and low power dissipation. The MAX4657EUA+ also features an integrated charge pump that supplies the +1V gate voltage required by the switches in the circuit. The +1V gate-to-source voltage allows increased signal handling performance compared to external gate-drive and control ICs. The switches have an input voltage range of +2.7V to +5.5V (or +15V for the automotive version). The MAX4657EUA+ has a voltage-controlled logic input that accepts logic levels of +2V and greater. The logic input is protected against electrostatic discharge (ESD) up to 4.3 kV.

When the logic input voltage is low, the switch becomes open, which disconnects the associated circuit from the input or output. When the logic input voltage is high, the switch becomes closed, which connects the associated circuit to the input or output. The switches can be operated from the logic input, from the input voltage, or from an external control voltage. The MAX4657EUA+ provides maximum current/voltage ratings of 10A/6V and can handle signals up to 15V – dependent on the voltage drop across the switch.

Conclusion

The MAX4657EUA+ is a dual single-pole/throw (SPST) analog switch optimized for low on-resistance and features a high-voltage rail-to-rail signal handling. It has an input voltage range of +2.7V to +5.5V (or +15V for the automotive version), and operates over an automotive temperature range of –40°C to +125°C. The MAX4657EUA+ offeres an integrated charge pump to supply the +1V gate voltage required by the switches in the circuit. It is typically used for high-current switching applications including automotive infotainment systems, industrial and medical instrumentation, automotive and consumer linear and switch-mode power supplies, high-current power controllers, hi-fi and studio amplifiers, and headphones.