MAX6793TPLD2+T

PMIC - Supervisors: MAX6793TPLD2+T Application Field and Working Principle

The MAX6793TPLD2+T is a high-performance, low-power power supply supervisor designed to monitor and protect multiple rails. This device monitors six system power supplies and performs a reset in the event of an overvoltage, undervoltage, or brownout condition. It also imposes an adjustable voltage delay time before the reset is executed.

The MAX6793TPLD2+T is housed in a tiny 3mm x 3mm, 0.5mm pitch 8-pad, lead-free, RoHS-compliant package. The device is pin-compatible with the MAX669 and MAX3737, which makes upgrading to this solution easy. It also includes an integrated 32.768kHz oscillator for an accurate watch dog timer.

In terms of applications, the MAX6793TPLD2+T is ideal for use with microprocessors and digital signal processors that require reset within 1ms. It is also useful in lithium ion battery-powered systems, given its low quiescent current of 45uA, which supports long operating times. This device is thus suitable for cell phones, portable electronic devices, motor controllers, and automotive systems.

Working Principle of MAX6793TPLD2+T

The MAX6793TPLD2+T is a dual-supply supervisor that easily works with unregulated power supplies. The device compares both supply and adjustable threshold voltages against each other and outputs a reset signal when the voltage drops below the reset threshold voltage. This reset signal can then be used to end the system power cycle.

The MAX6793TPLD2+T is optimized to support the different supply voltages of electronic devices or systems. It accepts supply voltages between 5V and 16V, and supports adjustable thresholds for the reset voltage. It also features an integrated debounce circuit that prevents reset pulses caused by noise or transients. It also features a manual reset switch that can be used to manually initiate a reset.

In addition to resetting the system, the integrated watchdog timer offers system monitoring, which can be used to reset the device in the event of system faults. This timer has a programmable timeout duration, and is triggered by either a short pulse (~5ms) or a logic-high signal. After timeout, reset is triggered. The MAX6793TPLD2+T also features pull-down resistors on the reset output terminals to provide lower power consumption.

Conclusion

The MAX6793TPLD2+T is a high-performance, low-power power supply supervisor designed to monitor and protect multiple rails. It is well-suited for use with microprocessors and DSPs, cell phones, portable electronic devices, motor controllers, and automotive systems. The device is easy to integrate into existing systems, and is optimized to support different supply voltages. It has an integrated debounce circuit, watchdog timer, and pull-down resistors on the reset output terminals, providing superior functionality and power consumption.