DS1816-20

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Power management integrated circuits (PMICs) provide the essential power components for integrated circuits (ICs) in embedded systems, computers, networking systems and consumer electronic equipment. Supervisors are special-purpose ICs that monitor the power supply voltages and supply reset signals when an error is detected. They are widely used to prevent devices in an embedded system from failing due to a power-supply fault.

The DS1816-20 is a popular supervisor IC, manufactured by Texas Instruments, that monitors power supply(s). It is a high-accuracy, low-power-consumption device that features a self-calibrating comparator, independent monitoring of two power supplies and two independent monitoring outputs. The device is suitable for use in a variety of applications, including Intel-based embedded systems, power supplies, routers, gateways, consumer electronics, and other applications where voltage monitoring is a key requirement.

Application Field

The DS1816-20 supervisor IC is designed for use in a variety of systems, where power supply monitoring and resetting is a key requirement. It is well-suited for Intel-based x86 embedded systems, as well as variety of power supplies, routers, gateways, consumer electronics, and other applications. Specifically, it is ideal for applications that require a high accuracy to monitor positive and/or negative voltage power supplies, and features two independent monitoring outputs.

Working Principle

The DS1816-20 supervisor IC operates by monitoring a power supply voltage, and generating a reset pulse when that voltage falls below an adjustable threshold. The device features a self-calibrating comparator, which is used to give greater accuracy to the voltage monitoring and reset thresholds. The device can also be used to monitor two power supplies, with two independent monitoring outputs.

The reset output is triggered when the power supply voltage falls below the set threshold, which is programmed using a resistor network. When the reset is triggered, the reset output pin is held in the low state for a minimum amount of time, then reset to the high state. The time for the reset pulse is user-definable, with the minimum time being 5 µs and the maximum time being 1 s. The time for the reset can be set different for each channel, depending on the application.

The DS1816-20 supervisor IC also features overvoltage protection, reverse voltage protection, and ESD protection. The device can be used in systems that require temperatures ranging from -40°C to +85°C, and has an operating voltage range of 2.2V to 5.5V.

In summary, the DS1816-20 supervisor IC is a robust, high-accuracy device designed for use in a variety of systems where power supply monitoring and resetting is a key requirement. It features a self-calibrating comparator, independent monitoring of two power supplies, and two independent monitoring outputs. The device has a wide temperature range, and robust protection against overvoltage, reverse voltage and ESD.

Although the exact implementation will vary based on the application, this supervisor IC is an excellent choice for a wide variety of power supply related applications.

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