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PMIC - Supervisors

The ADM6315-26D2ARTZRL is an advanced, three-pin micro-power Reset supervisor with adjustable reset and power-good outputs optimized for portable, low voltage consumer and industrial applications. The device is designed to monitor the power supply rail and can be used to provide reset pulses after power-up when power is first applied. The reset function can be configured to be active for any reset voltage with a wide supply voltage range to accommodate multiple system power-up sequences and keeps the reset active for adjustable reset timeout periods. The programmable power-good output can be set to be active during normal operation and to become inactive during fault conditions.

Features

• Adjustable Reset Delay and Reset Timeout Periods
• Wide Supply Voltage Range from 1.9V to 5.5V
• Programmable Power-Good Output
• Low Supply Current for Battery-Powered Systems
• Open Collector Reset and Power-Good Outputs
• Reset Output Valid for Low Voltages
• Available in 8-Lead MSOP and SOIC Packages

Application

The ADM6315-26D2ARTZRL is designed to monitor all system supply rails regardless of the number, type, or stability of power sources. The device provides a reset output active at a programmed reset voltage and a reset timeout period after the supply voltage drops below a programmed reset voltage. The device also contains an adjustable power-good output, which signals the state of the monitored supply voltage rails. The ADM6315-26D2ARTZRL is available in small 8-lead MSOP and SOIC packages and is ideal for use in low power and portable devices such as mobile phones, PDAs, digital cameras, MP3 players and other handheld devices.

Working Principle

The ADM6315-26D2ARTZRL contains a precision voltage reference, error amplifier, voltage detection circuit, and two programmable timing circuits. The voltage reference is optimized for low power consumption and high accuracy. The error amplifier is used to compare the monitored supply rail voltage to the precision voltage reference and to create an error voltage that is attenuated to create a reset threshold voltage. The voltage detection circuit is used to detect any lapse of the monitored supply voltage below the reset threshold voltage. The two programmable timing circuits are used to set the on-delay time after power-up and the reset timeout period.

Conclusion

The ADM6315-26D2ARTZRL is an advanced, three-pin micro-power reset supervisor designed to monitor the power supply rails and provide reset pulses after power-up in low voltage consumer and industrial applications. It can be used to ensure system stability and prevent system failure and is available in small 8-lead MSOP and SOIC packages. The reset function is adjustable and ensures reset is active for adjustable reset timeout periods. The programmable power-good output can be set to be active during normal operation and inactive during fault conditions.

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