19-1512; Rev 2; 10/10
SOT23, 1.8V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference
The MAX917–MAX920 nanopower comparators in
space-saving SOT23 packages feature Beyond-theRails™ 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.
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
Ordering Information
PIN-PACKAGE
TOP
MARK
PKG
CODE
MAX917EUK+T
5 SOT23
ADIQ
U5+1
MAX917ESA+
8 SO
MAX918EUK+T
5 SOT23
PART
Applications
2-Cell Battery Monitoring/Management
Ultra-Low-Power Systems
Mobile Communications
—
S8+2
ADIR
U5+1
MAX918ESA+
8 SO
—
S8+2
Notebooks and PDAs
MAX919EUK+T
5 SOT23
ADIS
U5+1
Threshold Detectors/Discriminators
MAX919EUK/V+T
5 SOT23
AFGP
U5+1
Sensing at Ground or Supply Line
MAX919ESA+
8 SO
Telemetry and Remote Systems
MAX920EUK+T
5 SOT23
Medical Instruments
Selector Guide
OUTPUT
TYPE
SUPPLY
CURRENT
(nA)
Yes
Push-Pull
750
Yes
Open-Drain
Push-Pull
380
No
Open-Drain
380
S8+2
U5+1
—
MAX920ESA+
8 SO
S8+2
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Pin Configurations
750
No
—
ADIT
PART
INTERNAL
REFERENCE
MAX917
MAX918
MAX919
MAX920
Typical Application Circuit appears at end of data sheet.
Beyond-the-Rails is a trademark of Maxim Integrated Products, Inc.
TOP VIEW
OUT 1
VEE 2
5
4
IN- (REF)
MAX917
MAX918
MAX919
MAX920
IN+ 3
( ) ARE FOR MAX917/MAX918.
VCC
SOT23
Pin Configurations continue at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX917–MAX920
General Description
