MAX6334UR20D3+

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Power management integrated circuits (PMICs) are used to control, regulate and convert electrical energy so that it can be utilized in various electronic applications. While this technology is incredibly useful and cost-effective, it is important to understand the different PMICs, their purposes and working principles. This article explores the application field and working principle of the MAX6334UR20D3+ power supervisor.The MAX6334UR20D3+ is a dual, +2.2V to +5.6V, low-power power supervisor with a reset and reset-enable output. The supervisor features a micropower reset to monitor power supply rails and ensure that digital systems are reset if power goes out of tolerance. It features assert delay, reset duration and power-up reset timeout (tPOR) configurable via external resistor dividers.The MAX6334UR20D3+ is ideal for applications requiring pulse width modulation (PWM) regulation, where the PMIC is used to help the target system detect, track and respond to changes in the power rail. Additionally, it is used in applications with high power demands, current and voltage regulation and power supply accuracy. The MAX6334UR20D3+ is often used in point of load (PoL) or power management units (PMUs), where power rails must be tightly regulated and monitored. Applications requiring the MAX6334UR20D3+ include PCs, servers, gaming consoles, tablets, ultra-books, networking equipment and other intelligent end points.The MAX6334UR20D3+ is designed to be used in active low or active high reset configurations. In active low configuration, a low-going assertion reset is asserted by the MAX6334UR20D3+ when power rails exceed their power supply tolerance. In active high configuration, an assertion of high is output when power rails exceed their power supply tolerance. Additionally, the MAX6334UR20D3+ includes built-in logic to prevent false reset generation.The MAX6334UR20D3+ uses an external pull-up resistor network to detect and report the active-high reset state of the device. When the active-high reset state is detected, the MAX6334UR20D3+ will assert an active-low reset. The MAX6334UR20D3+ also has an adjustable reset timeout window to prevent the reset assertion from staying asserted indefinitely.The MAX6334UR20D3+ also has a reset fail-safe feature, which is designed to prevent false reset generation due to power rail supply variation. It does this by asserting a reset regardless of the actual power rail voltage. When the reset-fail-safe threshold is exceeded, the reset output is asserted and the upper and lower power supply thresholds must be re-met before another reset is asserted.The MAX6334UR20D3+ can operate over a temperature range of -40°C to +125°C and its low-power operation consumes only 40µA over the -40°C to +85°C temperature range. Furthermore, it can operate over a VDD voltage range of 2V to 5.5V, making it ideal for applications where a low-power, highly reliable voltage monitoring and reset is required. In conclusion, the MAX6334UR20D3+ is a dual, low-power supervisor with reset and reset-enable output designed for monitoring power supply rails and ensuring that digital systems are reset if power goes out of tolerance. It features assert delay, reset duration and power-up reset timeout configurable via external resistor dividers, making it ideal for applications requiring pulse width modulation regulation and other applications with high power demands, current and voltage regulation and power supply accuracy.

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