DS1233M-55/T&R

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The DS1233M-55/T&R is a PMIC - Supervisors component from Maxim Integrated. It comprises of a supervisor and a TPI triggered reset function with an integrated temperature-sensing circuit. This component is designed for space-constrained applications that require accurate monitoring of power supply conditions. It features an on-chip voltage reference and temperature sensor to detect overvoltage and thermal events.

The DS1233M-55/T&R is equipped with a wide range of monitoring and control functions including, undervoltage and overvoltage reset, power-on reset (POR), and power-down sequenced reset. It also provides low-voltage/low-power detection and symmetric reset, and delay timer. The component has a selectable reset timeout, adjustable trip points, and supervisor hysteresis for improved accuracy.

Additionally, it features an adjustable reset output, over-range thermal protection, and temperature-sensing trip points. It has a temperature-sensor accuracy of ±3°C. The component is available in 20-pin TSSOP-EP package, and operates over a temperature range of -40°C to +85°C, with power supply voltage of 3V to 5.5V.

The application field of DS1233M-55/T&R has wide ranging applications in medical, communication, industrial, and consumer electronics. The component can be used in environments where accurate power supply regulation, thermal sensing, and reset monitoring are necessary. The component is well suited for systems such as equipment control, dual power path, and power-failure warning.

The working principle of DS1233M-55/T&R follows the typical reset chair technique. The component monitors power supply voltageto detect when it deviates from allowed levels (either below the undervoltage threshold, or above the overvoltage threshold). When this happens, the power shut down sequence is initiated by the application of the reset signal. The reset signal can be further delayed by the adjustable delay timer in order to allow the power supply voltage to return to normal before resetting the system.

The component also provides an adjustable thermal-sensing trip point. When the temperature exceeds this value, the reset signal is activated, causing the applied voltage to the device to be initialized with a predetermined value. Additionally, the component includes a power-down sequenced reset feature. This feature monitors inductor current and instantaneously forces the reset signal low when the inductor current falls below a set voltage.

The DS1233M-55/T&R is an ideal component for accurate monitoring of power supply conditions in space-constrained applications. Its wide range of monitoring and control functions, adjustable trip points, and delay timer make it an effective reset supervisor for systems such as dual power path, equipment control, and power-failure warning. Its thermal sensing capability is a valuable feature for systems operating in extreme conditions where overheating can be a concern.

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