LTC1540 - но дорого. http://cds.linear.com/docs/en/datasheet/1540fas.pdf Ultralow Quiescent Current: 0.3µA Typ
■ Reference Output Drives 0.01µF Capacitor
■ Adjustable Hysteresis
■ Available in 3mm x 3mm x 0.8mm DFN Package
■ Wide Supply Range: 2V to 11V
■ Input Voltage Range Includes the Negative Supply
■ Reference Output Sources Up to 1mA
■ TTL/CMOS Compatible Outputs
■ 60µs Propagation Delay with 10mV Overdrive
■ No Crowbar Current
■ 40mA Continuous Source Current
■ Pin Compatible with LTC1440, MAX921, MAX931