S-80913CLPF-G6HTFU

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Power-management integrated circuits (PMICs) are devices that help manage the power flow in different electronic systems. Supervisors, as one type of PMICs, refer to a family of devices which monitor the power supply of the system, and provide reset and warning signals when necessary. S-80913CLPF-G6HTFU, from Seiko-Epson, is an example of such a supervisor.

S-80913CLPF-G6HTFU is a single channel, low-voltage supervisor IC with overvoltage protection, widely used to protect a system-level power rail. It is suitable for both high-side applications and low-side applications and works within a wide voltage range of +2.2V to +5.5V. It also utilizes a high-accuracy voltage detection circuit and a simple setup circuitry to achieve a high-accuracy, low-current reset detection.

In terms of its application field, S-80913CLPF-G6HTFU find its main usage in:

• Various industrial applications such as mechatronics robots, 3D printers and process controllers;
• Different consumer electronics products such as digital and mobile devices, labtop and digital cameras, etc.;
• Automotive electronics: In-vehicle infotainment systems, etc.

The working principle of the S-80913CLPF-G6HTFU is simple and intuitive. To avoid accidental reboot due to short-term voltage drops, the voltage detection circuit is configured with a hysteresis of 0.9V between reset and warning thresholds. The output of the voltage detector then actuates reset and warning pins. The reset pin is initially high, but it is pulled low when the input voltage falls below the reset-threshold. The warning pin is high when the voltage is greater than the reset threshold, and changes low when it is below the warn-threshold. It should be noted that both the reset and warning pins are open-drain, so external pull-up resistors are required to enable these systems to "activate" the reset or warning signals.

Besides the voltage-detection circuit, two additional features are provided by the S-80913CLPF-G6HTFU to create a simple yet reliable power-supply-maintenance system. The first one, with a maximum capacitance of 1.3 μF, is the internal pull-up circuitry, to reduce the noise from the supply rail and power the reset pin when the supply voltage is below the reset threshold. Secondly, an overvoltage protection (OVP) circuitry with adjustable threeshold levels is implemented to ensure the safety of the system.

In conclusion, the S-80913CLPF-G6HTFU is a supervisor IC implementation with OVP and reset/warning thresholds, generally used to manage system-level power supply. It can be broadly applied to a variety of industrial, consumer electronics, and automotive applications.

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