MAX9025_11 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – UCSP, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference

19-3241; Rev 1; 6/11
UCSP, 1.8V, Nanopower, Beyond-the-Rails
Comparators With/Without Reference
General Description
The MAX9025–MAX9028 nanopower comparators in
space-saving chip-scale (UCSP™) packages feature
Beyond-the-Rails™ inputs and are guaranteed to oper-
ate down to +1.8V. The MAX9025/MAX9026 feature an
on-board 1.236V ±1% reference and draw an ultra-low
supply current of only 1µA, while the MAX9027/
MAX9028 (without reference) require just 0.6µA of supply
current. These features make the MAX9025–MAX9028
family of comparators ideal for all 2-cell battery-
monitoring/management applications.
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 MAX9025/MAX9027 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 5mA. The MAX9026/MAX9028
have an open-drain output stage that makes them suit-
able for mixed-voltage system design. All devices are
available in the miniature 6-bump UCSP packages.
Refer to the MAX9117 data sheet for similar comparators
in 5-pin SC70 packages and the MAX9017 data sheet for
similar dual comparators in 8-pin SOT23 packages.
Applications
2-Cell Battery Monitoring/Management
Ultra-Low-Power Systems
Mobile Communications
Notebooks and PDAs
Sensing at Ground or Supply Line
Telemetry and Remote Systems
Medical Instruments
Selector Guide
PART
MAX9025
MAX9026
MAX9027
MAX9028
INTERNAL
REFERENCE
Yes
Yes
No
No
OUTPUT
TYPE
Push-Pull
Open-Drain
Push-Pull
Open-Drain
SUPPLY
CURRENT
(µA)
1.0
1.0
0.6
0.6
Typical Application Circuit appears at end of data sheet.
Features
♦ Space-Saving UCSP Package (1mm x 1.52mm)
♦ Ultra-Low Supply Current
0.6µA (MAX9027/MAX9028)
1µA with Reference (MAX9025/MAX9026)
♦ Guaranteed to Operate Down to +1.8V
♦ Internal 1.236V ±1% Reference (MAX9025/MAX9026)
♦ Input Voltage Range Extends 200mV
Beyond-the-Rails
♦ CMOS Push-Pull Output with ±5mA Drive
Capability (MAX9025/MAX9027)
♦ Open-Drain Output Versions Available
(MAX9026/MAX9028)
♦ Crowbar-Current-Free Switching
♦ Internal Hysteresis for Clean Switching
♦ No Phase Reversal for Overdriven Inputs
Ordering Information
PART
TEMP
RANGE
BUMP-
PACKAGE
TOP
MARK
MAX9025EBT+T -40°C to +85°C 6 UCSP
ADB
MAX9026EBT+T -40°C to +85°C 6 UCSP
ADC
MAX9027EBT+T -40°C to +85°C 6 UCSP
ADD
MAX9028EBT+T -40°C to +85°C 6 UCSP
ADE
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Pin Configurations
TOP VIEW
B
A
(BUMPS ON BOTTOM)
1
IN+
V_CC
MAX9025–
MAX9028
2
REF
(V_EE)
OUT
3
IN-
V_EE
Beyond-the-Rails and UCSP are trademarks of Maxim Integrated
Products, Inc.
( ) MAX9027/MAX9028 PINS
UCSP
________________________________________________________________ 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.