Comparator Single R-R I/O 5.5V 5-Pin SOT-23

The MAX917–MAX920 nanopower comparators in space-saving SOT23 packages feature Beyond-the-Rails inputs and are guaranteed to operate down to +1.8V. The MAX917/MAX918 feature an on-board 1.245V ±1.5% reference and draw an ultra-low supply current of only 750nA, while the MAX919/MAX920 (without reference) require just 380nA of supply current. These features make the MAX917–MAX920 family of comparators ideal for all 2-cell battery applications, including monitoring/management. The unique design of the output stage limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX917/MAX919 have a push-pull output stage that sinks and sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX918/MAX920 have an open-drain output stage that makes them suitable for mixed-voltage system design.

• Ultra-Low Supply Current
  • 380nA per Comparator (MAX919/MAX920)
  • 750nA per Comparator with Reference (MAX917/MAX918)

Guaranteed to Operate Down to +1.8V

Internal 1.245V ±1.5% Reference (MAX917/MAX918)

Input Voltage Range Extends 200mV Beyond-the-Rails

CMOS Push-Pull Output with ±8mA Drive Capability (MAX917/MAX919)

Open-Drain Output Versions Available (MAX918/MAX920)

Crowbar-Current-Free Switching

Internal Hysteresis for Clean Switching

No Phase Reversal for Overdriven Inputs

Space-Saving SOT23 Package