DS1706SESA+

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The DS1706SESA+ is a dual voltage supervisor from Dallas Semiconductor that offers integrated, accurate and reliable sequencing and reset functions for companies needing a precision control of power management. The device is particularly well suited for ultra-reliable and long-lasting, highly integrated systems in which multiple power supply rails may be present and a low power, low voltage, and low latency resetting and sequencing must be performed. The device is incredibly versatile, as it provides various configurable features such as power supply independent master/slave operation, adjustable reset/delay times, and programmable LED drive.

The DS1706SESA+ belongs to the group of PMIC (power management ICs) supervisors and monitors. PMICs primarily serve two purposes: firstly they control, monitor, and adjust the voltage of an IC/device; and secondly they are responsible for monitoring and identification of any abnormal or fault conditions that might occur within an IC/device.

Supervisors, one of the main components of the PMIC family, are protection devices that can detect and respond to faults on power systems. They are specifically designed to safeguard against over voltage and over-current conditions on the sensitive parts of the system. This includes components like the power supply rails, which can suffer from fluctuating voltages and load requirements, as well as for resetting the power IC or other logic IC after a power cycle or system ‘brown-out’.

The DS1706SESA+ consists of an integrated master and slave supervisor adapter providing two distinct supervisor output pins that enable independent management of each rail. The device also includes a programmable reset window to help regulate reset wait time and adjustable delay time out which can be set to the shortest available time window. The master/slave operation of the device is fully adjustable so that additional voltage thresholds can be applied to slave pins, if required.

The DS1706SESA+ employs a bandgap current reference to ensure both reset and delay pins have accurate and precise timing characteristics. An on-board precision voltage reference (1.235 V) is also provided to enable a constant threshold voltage for the reset function. In addition, the voltage reference of the device is programmable up to 4.2V so that it can be optimized for a wide range of application areas.

Furthermore, the DS1706SESA+ provides comprehensive protection against power system faults. The integrated thermal shutdown circuitry helps to guard against outsized power dissipation and device over-temperature. The device also helps to protect voltage transients ocurring during IC power-on and reset sequences, providing enhanced reliability and system performance.

In summary, the DS1706SESA+ is a dual voltage supervisor from Dallas Semiconductor that is especially suited for highly integrated and reliable power management. It belongs to the PMIC family and is classed as a supervisor, providing protection from over-voltage/over-current conditions on the sensitive parts of the system, such as on the power supply rails. The device offers an integrated master/slave adapter, a programmable reset window, adjustable delay times and various configurable features.

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