ST2803 1.0V~6.5V 0.7µA High-Precision CMOS Output Voltage Detector

Overview

The ST2803 is a high-precision, low-power voltage detector manufactured with CMOS technology, offering a detect voltage range of 1.0V~6.5V in 0.1V steps with extremely accurate threshold and minimal temperature drift (±100ppm/℃ typical). Detection accuracy reaches ±1% for detect voltages above 1.5V, while quiescent current is only 0.7µA typical. A built-in 0.06V hysteresis effectively prevents output chatter near the threshold: the output pulls to GND when the input falls below the detect voltage and follows VIN once the release voltage is exceeded, with a 60µs response time. With a CMOS push-pull output rated at 50mA, a SOT23-3 package and a -40~+85℃ operating range, the ST2803 provides a reliable voltage monitoring solution for microprocessor reset, battery back-up and power failure detection applications.

Features

• High accuracy: ±1% (detect voltage >1.5V), ±2% (≤1.5V)
• Low power consumption: 0.7µA typical (VIN=3.5V, -VDET=2.0V)
• Detect voltage range: 1.0V~6.5V in 0.1V increments
• Operating voltage range: 0.7V~7V
• Detect voltage temperature characteristics: ±100ppm/℃ typical
• Built-in hysteresis: 0.06V typical, prevents output chatter
• CMOS push-pull output, 50mA rated output current
• Response time: 60µs
• SOT23-3 package

Typical Applications

• Microprocessor reset circuitry
• Memory battery back-up circuits
• Power-on reset circuits
• Power failure detection