MAX917_07 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – SOT23, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference

19-1512; Rev 1; 1/07
SOT23, 1.8V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference
General Description
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 (with-
out 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-cur-
rent 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 suit-
able for mixed-voltage system design.
Applications
2-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 Instruments
Selector Guide
PART
MAX917
MAX918
MAX919
MAX920
INTERNAL
REFERENCE
Yes
Yes
No
No
OUTPUT
TYPE
Push-Pull
Open-Drain
Push-Pull
Open-Drain
SUPPLY
CURRENT
(nA)
750
750
380
380
Typical Application Circuit appears at end of data sheet.
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
PART
PIN-PACKAGE
TOP
MARK
PKG
CODE
MAX917EUK-T
MAX917ESA
MAX918EUK-T
MAX918ESA
MAX919EUK-T
MAX919ESA
MAX920EUK-T
MAX920ESA
5 SOT23-5
8 SO
5 SOT23-5
8 SO
5 SOT23-5
8 SO
5 SOT23-5
8 SO
ADIQ
—
ADIR
—
ADIS
—
ADIT
—
U5-1
S8-4
U5-1
S8-4
U5-1
S8-4
U5-1
S8-4
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
Pin Configurations
TOP VIEW
OUT 1
V_EE 2
IN+ 3
MAX917
MAX918
MAX919
MAX920
5 V_CC
4 IN- (REF)
Beyond-the-Rails is a trademark of Maxim Integrated Products, Inc.
( ) ARE FOR MAX917/MAX918.
SOT23-5
Pin Configurations continue at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.