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MAX17058 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – 1-Cell/2-Cell Li+ ModelGauge ICs | |||
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19-6172; Rev 1; 4/12
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
ï² Provides Accurate State-of-Charge
ï² Compensates for Temperature/Load Variation
ï² Does Not Accumulate Errors, Unlike Coulomb
Counters
ï² Eliminates Learning
ï² Eliminates Current-Sense Resistor
S Low Quiescent Current: 23µA
S Battery-Insertion Debounce
ï² Best of 16 Samples Estimates Initial SOC
S Programmable Reset for Battery Swap
ï² 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.
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maximâs website at www.maxim-ic.com.
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