MAX6702MKA+

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The MAX6702MKA+ is a one-time programmable (OTP) microprocessor supervisor, part of the PMIC – Supervisors family. It provides reset and supply voltage monitoring functions, as well as low-voltage lockout (LVO) protection for microprocessors and other digital circuitry. The MAX6702MKA+ is a highly integrated device with a single integrated circuit (IC) package providing the off-line voltage monitor, reset generator, reset logic, and capacitive voltage reference. This IC is ideal for use in portable and highly integrated applications, including microprocessor supervision and memory backup applications, as well as automotive power module supervision.

Application Field

• Microprocessor Supervision.
• Memory Backup Applications.
• Automotive Power Module Supervision.
• Portable and Highly Integrated Applications

Working Principle

The MAX6702MKA+ provides reset and supply voltage monitoring functions, as well as LVO protection for microprocessors and other digital circuitry. When the voltage monitored by the device reaches the reset threshold, the internal reset pulse is generated and the output reset signal is asserted. The output reset signal is held for an internally programmable time delay (reset timeout), providing a window during which the monitored voltage must remain above the reset threshold for reset to be deasserted. The MAX6702MKA+ has an internal watchdog (WDC) timer that periodically checks to ensure that the system is operating properly. If the watchdog timer is not activated within the preset timeout period, a reset will be issued. The voltage reference used for the reset and watchdog thresholds of the MAX6702MKA+ is provided by an on-chip, low-dropout band gap reference.

The MAX6702MKA+ also features an adjustable voltage-sensing system to provide optimized reset accuracy and performance. The reset and watchdog thresholds can be adjusted using an external resistor divider network connected between the RES/WDN pin and the V+ supply connector. The voltage reference is adjustable over a range of 1.8V to 5.5V, allowing the MAX6702MKA+ to be used in applications with different supply voltages. On-chip timeout-delay circuitry is also available on the MAX6702MKA+ which provides an adjustable reset timeout window.

In addition to providing reset and supply voltage monitoring, the MAX6702MKA+ also helps protect against over-current conditions. Upon detecting an over-current condition, the device will shut down its voltage rails, preventing damage to sensitive components. The MAX6702MKA+ also features over-voltage protection, which can be used to detect when the power supply voltage is outside the acceptable operating range. The MAX6702MKA+ also features a low-voltage lockout (LVO) protection which can be used to prevent device operation outside of the acceptable voltage range.

The MAX6702MKA+ is available in a 8-pin μMAX package, offering superior reliability and superior protection from moisture and other environmental contamination. The device is also RoHS-compliant, and is ESD-protected to ensure safety during handling.

The MAX6702MKA+ is an ideal solution for power management in microprocessor supervision, memory backup, and automotive power module supervision applications. The device combines flexibility, small size, and low-power consumption to provide an efficient and reliable solution for these applications.

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