EVALUATION KIT AVAILABLE
MAX17043/MAX17044
Compact, Low-Cost 1S/2S Fuel Gauges
with Low-Battery Alert
General Description
Features
o Host-Side or Battery-Side Fuel Gauging
1 Cell (MAX17043)
2 Cell (MAX17044)
o Precision Voltage Measurement
±12.5mV Accuracy to 5.00V (MAX17043)
±30mV Accuracy to 10.00V (MAX17044)
o Accurate Relative Capacity (RSOC) Calculated
from ModelGauge Algorithm
o No Offset Accumulation on Measurement
o No Full-to-Empty Battery Relearning Necessary
o No Sense Resistor Required
o External Alarm/Interrupt for Low-Battery Warning
o 2-Wire Interface
o Low Power Consumption
o Tiny, Lead(Pb)-Free, 8-Pin, 2mm x 3mm TDFN
Package or Tiny 0.4mm Pitch 9-Bump UCSP
Package
The MAX17043/MAX17044 are ultra-compact, low-cost,
host-side fuel-gauge systems for lithium-ion (Li+) batteries in handheld and portable equipment. The MAX17043
is configured to operate with a single lithium cell and the
MAX17044 is configured for a dual-cell 2S pack.
The MAX17043/MAX17044 use a sophisticated Li+ battery-modeling scheme, called ModelGauge™ to track
the battery’s relative state-of-charge (SOC) continuously
over a widely varying charge/discharge profile. Unlike
traditional fuel gauges, the ModelGauge algorithm eliminates the need for battery relearn cycles and an external current-sense resistor. Temperature compensation
is possible in the application with minimal interaction
between a µC and the device.
A quick-start mode provides a good initial estimate of
the battery’s SOC. This feature allows the IC to be
located on system side, reducing cost and supply
chain constraints on the battery. Measurement and estimated capacity data sets are accessed through an I2C
interface. The MAX17043/MAX17044 are available in
either a 0.4mm pitch 9-bump UCSP™ or 2mm x 3mm,
8-pin TDFN lead-free package.
Ordering Information
PART
Handheld and Portable
Applications
Digital Video Cameras
-20°C to +70°C
-20°C to +70°C
8 TDFN-EP*
MAX17043X+
GPS Systems
Digital Still Cameras
8 TDFN-EP*
MAX17043G+U
Portable DVD Players
MP3 Players
PIN-PACKAGE
MAX17043G+T
Applications
Smartphones
TEMP RANGE
-20°C to +70°C
9 UCSP
MAX17043X+T10
-20°C to +70°C
9 UCSP
MAX17044G+U
-20°C to +70°C
8 TDFN-EP*
MAX17044G+T
-20°C to +70°C
8 TDFN-EP*
MAX17044X+
-20°C to +70°C
9 UCSP
MAX17044X+T10
ModelGauge is a trademark of Maxim Integrated Products, Inc.
UCSP is a trademark of Maxim Integrated Products, Inc.
-20°C to +70°C
9 UCSP
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
GND Visit www.maximintegrated.com/products/patents for
product patent marking information.
Simplified Operating Circuit
150Ω
1kΩ
4.7kΩ
VDD
SYSTEM
μP
ALRT
INTERRUPT
CELL
MAX17043
MAX17044
Li+
PROTECTION
CIRCUIT
1μF
QSTRT
CTG
SDA
GND
SCL
EP
I2C BUS
MASTER
10nF
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-4811; Rev 6; 8/12
