MAX6167BESA+

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The MAX6167BESA+ is a voltage reference integrated circuit (IC) from Maxim Integrated. It is categorized under power management ICs (PMICs) and voltage references. The device is a low-dropout, precision band gap reference that generates a precision output voltage of 1.224V with excellent temperature and line regulation across a wide input voltage range.

Unlike traditional band gap references, the MAX6167BESA+ employs a new and innovative transfer ratio temperature regulation technique to provide a highly temperature-stable output voltage. As a result, this device is ideal for a wide range of applications including precision regulators, battery management systems, and temperature controllers.

Features and Benefits

The MAX6167BESA+ features a wide operating range from 2.1V to 28V, with an excellent output voltage accuracy of 0.5% over the entire temperature range and dropout voltage of 75mV maximum. The device provides exceptional temperature stability of 0.02%/°C over the temperature range of -40 to +125°C and fast load transient response of 0.2μs. It also provides excellent protection against reverse burst currents and overcurrent protection. Furthermore, the device supports multiple output current options of up to 10mA for a wide range of applications.

The MAX6167BESA+’s portability makes it well suited for automotive, consumer, medical, and communication applications, as well as portable device applications. Its compact package also enables easy integration into tight spaces, while its low power consumption reduces system power consumption and conserves energy. In addition, the device’s low EMI makes it suitable for use in environments where electromagnetic interference is a concern.

Application Examples

The MAX6167BESA+ is ideal for precision battery chargers and management systems. For example, the device can be used to create a high accuracy voltage reference for a boost-mode switch-mode power converter for a Li-ion battery charger. It can also be used as a precision reference for a shunt regulator in current-limited battery control circuits, providing precise voltage and current monitoring during power cycling or charge/discharge operations.

The device can also be used in other applications such as automotive light dimming, motor speed and torque control, and high accuracy temperature measurement. Additionally, it can be used in networking systems, such as for PoE (Power over Ethernet) applications and for biasing amplifiers, as well as for consumer applications in portable devices and audio systems.

Working Principle

The MAX6167BESA+ works by using a new and innovative transfer ratio temperature regulation technique that provides a highly temperature-stable output voltage. This technique employs two temperature-sensing elements, a junction transistor and a diode-connected transistor. By using these two components in combination, the reference voltage is adjusted to provide a stable voltage over the temperature range.

The junction transistor creates a thermal sensing element, while the diode-connected transistor compensates for variations in the junction transistor’s output voltage. This combination compensates for variations in the output voltage due to temperature, making the device ideal for applications that require a high level of precision.

Conclusion

The MAX6167BESA+ is a precision integrated circuit that is ideal for a wide range of power management and voltage reference applications. It features wide operating range, excellent output voltage accuracy and temperature stability, protection against reverse burst current, and multiple output current options. By utilizing its innovative transfer ratio temperature regulation technique, the device is capable of providing a highly temperature-stable output voltage, making it suitable for a wide range of precision applications, including battery management systems and automotive light dimming.

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