MAX16073RS31D2+T

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PMIC - Supervisors

The MAX16073RS31D2+T is an ultra-low quiescent current, low-voltage supervisor device designed for uninterrupted system power management and battery-powered applications. It can be used in a variety of applications ranging from LEDs, portable communication devices, wearable electronics, computer and server system design, and other battery-powered applications.

Maxim MAX16073RS31D2+T Features

• Wide Input Voltage Range: 2V to 18V.
• Very Low Quiescent Current: 0.018μA (Vin = 5V).
• No Restart During Brown-out with 1.8V Trip Threshold.
• Low Propagation Delay: 50μs at max. Vin.
• Selectable Reset Timeouts: 2ms to 512ms.
• Soft Start with 2.5V Trip Point.
• Power Fail Output with Adjustable Delay and Edge-Selectable.
• Single Supply Voltage Monitor Configuration.
• Push-Pull and Open-Drain Reset Output Configurations.
• 2-Pin Configuration Options.
• Integrated LDO for Power Path Switching with 6mA Current Limit.
• Low-Voltage Battery Monitor with 200mV Trip Threshold.

Application Fields

The MAX16073RS31D2+T, with its features and specifications, is ideal for a variety of applications. These include supplying low-noise, stable power, maintaining uninterrupted system power operations, and serving as an ultra-low quiescent current supervisor device.

Some of the applications that the 16073RS31D2+T can be used in include portable communication devices, mobile and embedded compute applications, battery-powered electronics, computer and server system design, distributed computing, and other battery-powered applications.

Working Principle

The MAX16073RS31D2+T is designed to protect a system by providing a power-fail warning with adjustable delay and edge-selectable, over-voltage monitoring, undervoltage supervision with restart threshold, and a soft start feature with 2.5V trip point.

The device constantly monitors the input voltage and provides an alert to the system if the input voltage drops below the minimum pre-programmed voltage level. This is accomplished by connecting the Power Fail (PFI) pin to the system’s reset line. The MAX16073RS31D2+T also has an adjustable alert delay, to accommodate the system’s power supply constraints.

To protect against overvoltage, the MAX16073RS31D2+T provides warning/protection to the system by monitoring the voltage level at the PFI pin. An overvoltage condition on the PFI pin triggers the device’s overvoltage protection circuit. Once the overvoltage protection circuit has been activated, the alert pin pulls low and the MAX16073RS31D2+T holds the system’s reset line low until the condition is cleared. This can be done manually by toggling the PFI pin input to the device, or automatically by the device’s internal timer.

The MAX16073RS31D2+T also provides low-voltage battery monitor protection. This is done by connecting the low-voltage battery monitor pin (LV) to a battery cell. If the voltage level on the LV pin drops below the threshold voltage of 200mV, the LV pin pulls low and the MAX16073RS31D2+T holds the system’s reset line low. This prevents the system from entering a low-voltage state.

Finally, the device features a soft start feature with 2.5V trip point. This feature will limit the inrush current during power-up and provide a more controlled system start-up sequence. This feature can be used with internal or external capacitors. It is suitable for use in systems where inrush current is an issue.

Conclusion

The MAX16073RS31D2+T is a low-voltage supervisor device for uninterrupted system power management and battery-powered applications. It has a wide input voltage range and a very low quiescent current. It also has selectable reset timeouts, overvoltage protection, low-voltage battery monitoring, and the soft start feature. These features make the MAX16073RS31D2+T ideal for use in a variety of applications ranging from LEDs and mobile communication devices, all the way to computer and server system design.

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