MAX6338EUB

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Power Supply Supervisors are critical components in a system and are an integral part of modern design. The MAX6338EUB is a precision micropower low-dropout monitoring circuit designed to monitor power supply voltages down to 1.8V. It helps to reduce system cost and complexity by combining overvoltage, undervoltage, and overtemperature sensing into one 16-pin SOIC package. The MAX6338EUB helps extend back-up battery life by lowering current consumption and it is ideal for portable systems.

The MAX6338EUB integrates a precision monitor that senses the main supply voltage and compares it to a reset threshold set by an external resistor. It features an overvoltage monitoring block with an adjustable trip point, which can be powered by the main supply or an independent voltage source to monitor higher voltage rails. The MAX6338 also features a thermal shutdown block with a hysteresis temperature point, adjustable with an external resistor. To enhance immunity to environmental noise, it has an adjustable reset propagation delay and reset timeout period.

In terms of applications, the MAX6338EUB is used in power supplies, systems where precision voltage/temperature/frequency monitoring is required as well as in notebook PCs, PDAs, portable instruments and digital cameras. It is also used in battery-backed systems and remote status monitoring systems.

The MAX6338EUB works on a power supply voltage range from1.5V to 3.6V and can monitor down to 1.8V. With an adjustable reset voltage, the reset voltage threshold is accurate and the integrated voltage regulator provides steady reset voltage over a wide range of conditions. It also has an adjustable 160ms max. reset time delay, with an additional 5ms max. delay time dependent on supply voltage deviation. The temperature sensor has a low hysteresis and has a temperature range of −50°C to +150°C.

The MAX6338EUB has a maximum input current of 12µA and a standby current of 100nA and it can wake the host from a deep sleep mode. It provides superior transient immunity, helping to reduce system cost and complexity. Its enhanced immunity to environmental noise helps to ensure reliable system operation, making it ideal for current portable applications.

In conclusion, the MAX6338EUB is a high-performance, very reliable Power Supply Supervisor designed for use in power supplies, notebooks, PDAs and portable instruments. It integrates overvoltage, undervoltage and overtemperature monitoring functions into a single 16-pin SOIC package, helping to reduce system cost and complexity. With a wide operating voltage range, adjustable reset voltage and superior transient immunity, the MAX6338EUB is an excellent choice for modern power supply designs.

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