MAX17058_13 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – 1-Cell/2-Cell Li+ ModelGauge ICs

EVALUATION KIT AVAILABLE
MAX17058/MAX17059
1-Cell /2-Cell Li+ ModelGauge ICs
General Description
The MAX17058/MAX17059 ICs are tiny fuel gauges
for lithium-ion (Li+) batteries in handheld and portable
equipment. The MAX17058 operates with a single Li+
cell and the MAX17059 with two Li+ cells in series.
The ICs use the sophisticated Li+ battery-modeling
algorithm ModelGaugeK to track the battery relative
state-of-charge (SOC) continuously over a widely varying
charge/discharge conditions. The ModelGauge algo-
rithm eliminates current-sense resistor and battery-learn
cycles required by other fuel gauges. Temperature
compensation is implemented using the system micro-
controller.
On battery insertion, the ICs debounce initial voltage
measurements to improve the initial SOC estimate,
allowing them to be located on system side. SOC and
voltage information is accessed using the I²C interface.
The ICs are available in a tiny 0.9mm x 1.7mm, 8-bump
wafer-level package (WLP) or a 2mm x 2mm, 8-pin TDFN
package.
Applications
Wireless Handsets
Smartphones /PDAs
Tablets and Handheld Computers
Portable Game Players
e-Readers
Digital Still and Video Cameras
Portable Medical Equipment
Features and Benefits
S MAX17058: 1 Cell, MAX17059: 2 Cells
S Precision ±7.5mV/Cell Voltage Measurement
S ModelGauge Algorithm
 Provides Accurate State-of-Charge
 Compensates for Temperature/Load Variation
 Does Not Accumulate Errors, Unlike Coulomb
Counters
 Eliminates Learning
 Eliminates Current-Sense Resistor
S Low Quiescent Current: 23µA
S Battery-Insertion Debounce
 Best of 16 Samples Estimates Initial SOC
S Programmable Reset for Battery Swap
 2.28V to 3.48V Range
S Low SOC Alert Indicator
S I²C Interface
Ordering Information appears at end of data sheet.
Simplified Operating Circuit
ONLY ONE
EXTERNAL
COMPONENT
MAX17058
VDD
ALRT
CELL
SDA
CTG
SCL
GND
QSTRT
SYSTEM
µP
ModelGauge is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-6172; Rev 4; 6/13