Features: 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
Application2-Cell Battery Monitoring/Management
Ultra-Low-Power Systems
Mobile Communications
Notebooks and PDAs
Threshold Detectors/Discriminators
Sensing at Ground or Supply Line
Telemetry and Remote Systems
Medical InstrumentsPinout
SpecificationsSupply Voltage (VCCto VEE)...................................................+6V
Voltage Inputs (IN+, IN-, REF).............(VEE- 0.3V) to (VCC+ 0.3V)
Output Voltage
MAX917/MAX919..................................(VEE- 0.3V) to (VCC+ 0.3V)
MAX918/MAX920..............................................(VEE- 0.3V) to +6V
Output Current.................................................................±50mA
Output Short-Circuit Duration.............................................10sec
Continuous Power Dissipation (TA= +70°C)
5-Pin SOT23 (derate 7.31mW/°C above +70°C).............571mW
8-Pin SO (derate 5.88mW/°C above +70°C)...................471mW
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range............................-65°C to +150°C
Lead Temperature (soldering, 10sec)...............................+300°C
DescriptionThe 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 (with-out reference) require just 380nA of supply currentThese features make the max920 comparators ideal for all 2-cell battery applications, including monitoring/management. The unique design of the output stage limits supply-cur-
rent surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumptionunder 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.TheMAX918/max920 have an open-drain output stage that makes them suit-able for mixed-voltage system design
max920 Data Sheet
