ST2806 1.0V~6.5V ±1% NMOS Open-Drain Voltage Detector with Built-in Delay
Specifications
Product details
Overview
The ST2806 is a high-precision voltage detector in ultra-small packages, developed with NMOS process and featuring a built-in fixed delay time generator; its internal oscillator and counter timer delay the release signal without external parts. The detect voltage ranges from 1.0V~6.5V in 0.1V steps with ±1% accuracy and minimal temperature drift (±100ppm/℃ typical), while quiescent current is only 0.9µA typical at VDD=3V. The delay time is fixed by the built-in oscillation circuit and counter: 50ms for the A/C series and 20ms for the B series with the DS pin low, shortened to 50µs when DS is tied high and the output is taken from the middle of the counter; no delay is applied when the voltage falls below the detect threshold, ensuring fast reset response. With an NMOS open-drain output and five package options — SOT23, SOT23-3, SOT23-5, DFN1.2×1.6-4 and DFN2×2-6 — over a -40~+85℃ operating range, the ST2806 delivers a precise delayed-reset power monitoring solution for space-constrained portable devices and microcomputer systems.
Features
- High accuracy: ±1%
- Built-in fixed delay time generator, no external parts required
- Release delay: 50ms (A/C series) or 20ms (B series) with DS low; 50µs with DS high
- Low power consumption: 0.9µA typical (VDD=3V)
- 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
- NMOS open-drain output, 50mA rated output current
- SOT23 / SOT23-3 / SOT23-5 / DFN1.2×1.6-4 / DFN2×2-6 packages
Typical Applications
- Power monitor for portable equipment such as notebook computers, digital still cameras, PDAs and cellular phones
- Constant voltage power monitor for cameras, video equipment and communication devices
- Power monitor for microcomputers and reset for CPUs
- System battery life and charge voltage monitors
