SGM890B Datasheet | SG Micro

SGM890B/SGM891B Voltage Detector with Separated Sense Pin and Delay Capacitor Pin GENERAL DESCRIPTION The SGM890B and SGM891B are low-power and high-accuracy voltage detectors. The adjustable threshold range is 0.8V to 5.0V with increments of 0.1V, which greatly provides application flexibility. Since the sense pin (VSEN) of the device is separated from the power supply pin, it can monitor other power supplies. And when the monitored power supply voltage drops to 0V, the device can also maintain the detection state. In addition, the CD pin of SGM890B has an external capacitor connected to GND, which can adjust the release delay time. Consequently delay time can be set to more than 1s when the delay capacitor (CD) is 1μF. These devices are very suitable for applications in power sequencing, reset sequencing and power switching. The SGM890B and SGM891B are available in a Green SOT-23-5 package. They are specified over the -40℃ to +125℃ operating temperature range. Features - Operating Voltage Range: 1V to 6V - High Accuracy Detection: ±1% (TYP) - Low Power Consumption: 0.3μA (TYP) at VIN = 1V - Detection Voltage Range: 0.8V to 5.0V (0.1V Increments) - Detection Voltage Temperature Coefficient: ±40ppm/℃ (TYP) - Adjustable Release Delay Time (SGM890B Only) - Sense Pin Separates from Power Supply - N-Channel Open-Drain Output - -40℃ to +125℃ Operating Temperature Range - Available in a Green SOT-23-5 Package APPLICATIONS Power Sequencing and Reset Sequencing Power Switching Portable Equipment puters/Servers TYPICAL APPLICATION Power Supply Monitoring SGM890B/1B VSEN VOUT CD (SGM890B Only) RPULL 100kΩ VOUT Figure 1. Typical Application Circuit SG Micro Corp...