MAX6385XS28D7-T

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PMIC - Supervisors is a class of integrated circuit (IC) devices used in power management system of electronics. This designs direct and control actual power going to the system, as well as monitor and maintain all the voltage rails. Specifically, MAX6385XS28D7-T is a voltage supervisor powered from main system (3V to 5.5V) that includes a window comparator, reset output, and a power-on reset signal.

MAX6385XS28D7-T has a robust power-on reset (POR) circuit that generates reset signal with a minimum 100ms ASSERTION TIME and sends a signal during power up and power down. The voltage supervisor also has a window comparator functioning like a comparator with single comparator but with adjustable thresholds for monitoring an input signal and generating reset or interrupt signal when the input crosses thresholds. It helps in avoiding any delay in power up and preventing it from taking too long RESET from cycling.

This voltage supervisor is efficient in battery-operated applications as low operating current (3uA) consumption and a wide range of feedback resistance options caters to most system. With an operating temperature of -40°C to +85°C, it is suitable for the majority of commercial applications.

MAX6385XS28D7-T application field is wide and a few examples include Monitor battery low voltage in portable systems, Determine when system voltage has dropped below acceptable level in Industrial systems and Extract data from a noisy ADC output.

This voltage supervisor works on the concept of thermal regulation. The operating temperature is set by an internal circuitry and a temperature-controlled oscillator (TCXO) based on the biased current. This current is driven by the output of two transistor stage amplifier and a voltage divider. This output voltage is then compared in the comparator stage. If it exceeds the predetermined threshold, reset signal is sent to activate the reset output.

MAX6385XS28D7-T voltage supervisor with Push-pull output is configured with a built-in inverter for improved noise immunity and low power consumption. It generates logic HIGH output when the monitored voltage is within the specified UVLO (Under Voltage Lock Out) window.

MAX6385XS28D7-T voltage supervisor with Open-drain output configuration is used in applications where sinking ability is needed to ground the output. The monitored voltage meets the voltage trip point and outputs a RESET signal when the voltage is below the set point.

The reset threshold can be adjusted using an external resistor and is delivered depending upon the IC’s input voltage applied. This voltage supervisor incorporates an internal hysteresis level that allows for slight changes in input voltage to not trigger a reset. Hysteresis is the amount of shift between the trip point of the reset high level and the reset low level.

MAX6385XS28D7-T voltage supervisor is a cost-effective solution with stable reset, reset holdoff and reset delay times. It is widely used in battery-operated applications such as portable systems, metering, data acquisition systems and handheld instruments.

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