General Description
The MAX17043/MAX17044 are ultra-compact, low-cost,
host-side fuel-gauge systems for lithium-ion (Li+) batter-
ies 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+ bat-
tery-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 elim-
inates the need for battery relearn cycles and an exter-
nal 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 esti-
mated capacity data sets are accessed through an I
2
C
interface. The MAX17043/MAX17044 are available in a
small, 2mm x 3mm, 8-pin TDFN lead-free package.
Applications
Features
♦ Host-Side or Battery-Side Fuel Gauging
1 Cell (MAX17043)
2 Cell (MAX17044)
♦ Precision Voltage Measurement
±12.5mV Accuracy to 5.00V (MAX17043)
±30mV Accuracy to 10.00V (MAX17044)
♦ Accurate Relative Capacity (RSOC) Calculated
from ModelGauge Algorithm
♦ No Offset Accumulation on Measurement
♦ No Full-to-Empty Battery Relearning Necessary
♦ No Sense Resistor Required
♦ External Alarm/Interrupt for Low-Battery Warning
♦ 2-Wire Interface
♦ Low Power Consumption
♦ Tiny, Lead-Free, 8-Pin, 2mm x 3mm TDFN
Package
MAX17043/MAX17044
Compact, Low-Cost 1S/2S Fuel Gauges
with Low-Battery Alert
________________________________________________________________
Maxim Integrated Products
1
Ordering Information