Overview of the S-818 Series CMOS Voltage Regulator
The S-818 Series, manufactured by SII Semiconductor Corporation, is a range of positive voltage regulators distinguished by their CMOS technology. The series is designed to provide a stable and accurate voltage supply, with a particular emphasis on low dropout voltage, high output voltage accuracy, and reduced power consumption.
Key Features Highlighted in the Datasheet
Output Voltage Range: The regulators can be set to output voltages from 2.0 V up to 6.0 V in 0.1 V increments.
Accuracy: The output voltage accuracy stands at ±2.0%, ensuring precise regulation.
Low Dropout Voltage: The dropout voltage is characteristically low, at typical 170 mV for a 5.0 V output product drawing 60 mA.
Current Consumption: During standard operation, the typical current consumption is 30 µA, which maximizes at 40 µA. When in power-off state, it remarkably reduces to 100 nA typical consumption, with a maximum of 500 nA.
High Output Current: The device can supply an output current of up to 200 mA for the 3.0 V product and up to 300 mA for the 5.0 V product, given an appropriate input voltage.
Capacitor Compatibility: They are designed to be used with a ceramic capacitor of 2 µF or larger.
Built-in ON/OFF Circuit: The inclusion of an ON/OFF circuit contributes to extended battery life.
Temperature Range: These regulators can operate reliably over a wide temperature range from -40°C to +85°C.
Environmental Compliance: The products are lead-free, 100% tin (Sn), and halogen-free, aligning with current environmental standards.
Applications and Packaging
The S-818 Series is suitable for a variety of applications including battery-powered devices, personal communication devices, and home electrical/electronic appliances that require a consistent voltage supply. As for packaging, the S-818 Series offers two types: the miniature SOT-23-5 package for portable devices, and the SOT-89-5 package that is recommended for larger output current needs.
Additional Considerations
It is noteworthy that attention must be paid to the power dissipation of the package, especially when the output current is substantial. This is crucial to ensure the reliability and safety of the device in operation. For specific details, the datasheet indicates to refer to “Product Name Structure”.
Block Diagram
The datasheet includes a block diagram showcasing the internal structure of the regulator. It displays the arrangement of the ON/OFF control circuit, the reference voltage circuit, along with the VIN, VOUT, ON/OFF, and VSS connections. Additionally, the diagram notes the presence of a parasitic diode, indicated by an asterisked footnote.
References:
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