The MAX6330/MAX6331 combine a precision shunt regulator with a power-on reset function in a single SOT23-3 package. They offer a low-cost method of operating small microprocessor (µP)-based systems from high-voltage sources, while simultaneously protecting µPs from power-up, power-down, and brownout conditions. Both active-low (MAX6330) and active-high (MAX6331) push/pull output versions are available. The output voltage has ±1.5% tolerance. The MAX6330/MAX6331 operate over a wide shunt current range from 100µA to 50mA, and offer very good transient immunity. A 3-pin SOT23 package allows for a significant reduction in board space and improves reliability compared to multiple-IC/discrete solutions. These devices have a minimum order increment of 2,500 pieces. Applications * Controllers * Critical µP and µC Power Monitoring * Household Appliances * Intelligent Instruments * Portable/Size-Sensitive Equipment * 100µA to 50mA Shunt Current Range * Low Cost * 3-Pin SOT23 Package * ±1.5% Tolerance on Output Voltage * Three Shunt Voltages Available: 5V, 3.3V, 3.0V * Precision Power-On Reset Threshold: * 1.5% Tolerance Available with Either * RESET (MAX6331) or active-low RESET (MAX6330) Outputs * 140ms Reset Timeout Period-No External Components Required