The MAX17058/MAX17059 ICs are tiny fuel gauges for
lithium-ion (Li+) batteries in handheld and portable equip-
ment. 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 ModelGauge™ to track the battery relative
state-of-charge (SOC) continuously over a widely varying
charge/discharge conditions. The ModelGauge algorithm
eliminates current-sense resistor and battery-learn cycles
required by other fuel gauges. Temperature compensa-
tion 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 I
2
C 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.
●
MAX17058: 1 Cell, MAX17059: 2 Cells
●
Precision ±7.5mV/Cell Voltage Measurement
●
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
● Low Quiescent Current: 23μA
●
Battery-Insertion Debounce
• Best of 16 Samples Estimates Initial SOC
●
Programmable Reset for Battery Swap
• 2.28V to 3.48V Range
●
Low SOC Alert Indicator
●
I
2
C Interface
Ordering Information
appears at end of data sheet.
Features and Benefits
Applications
●
●
●
●
●
●
Smartphones, Tablets
Health and Fitness Monitors
Digital Still, Video, and Action Cameras
Medical Devices
Handheld Computers and Terminals
Wireless Speakers
Simple Fuel-Gauge Circuit Diagram
MAX17058
V
DD
ONLY ONE
EXTERNAL
COMPONENT
CELL
CTG
GND
ALRT
SDA
SCL
QSTRT
SYSTEM
µP
ModelGauge is a trademark of Maxim Integrated Products, Inc.
19-6172; Rev 7; 11/16
MAX17058/MAX17059
1-Cell/2-Cell Fuel Gauge with ModelGauge
Absolute Maximum Ratings
CELL to GND ........................................................-0.3V to +12V
All Pins (excluding CELL) to GND ..........................-0.3V to +6V
Continuous Sink Current, SDA,
ALRT
...............................20mA
Operating Temperature Range .......................... -40°C to +85°C
Storage Temperature Range ............................ -55°C to +125°C
Lead Temperature (TDFN only) (soldering, 10s) ............ +300°C
Soldering Temperature (reflow) ....................................... +260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(2.5V < V
DD
< 4.5V, -20°C < T
A
< +70°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Supply Voltage
Fuel-Gauge SOC Reset
(VRESET Register)
Data I/O Pins
Supply Current
Time Base Accuracy
ADC Sample Period
Voltage Error
Voltage-Measurement Resolution
Voltage-Measurement Range
SDA, SCL, QSTRT Input Logic-High
SDA, SCL, QSTRT Input Logic-Low
SDA,
ALRT
Output Logic-Low
SDA, SCL Bus Low-Detection
Current
Bus Low-Detection Timeout
V
IH
V
IL
V
OL
I
PD
t
SLEEP
I
OL
= 4mA
V
SDA
= V
SCL
= 0.4V (Note 5)
(Note 6)
1.75
0.2
MAX17058: V
DD
pin
MAX17059: CELL pin
2.5
5
1.4
0.5
0.4
0.4
2.5
V
ERR
SYMBOL
V
DD
V
RST
SCL, SDA,
ALRT
I
DD0
I
DD1
t
ERR
(Note 2)
Configuration range, in 40mV steps
Trimmed at 3V
(Note 2)
Sleep mode, T
A
< +50°C
Active mode
Active mode (Note 3)
Active mode
V
CELL
= 3.6V, T
A
= +25°C (Note 4)
-20°C < T
A
< +70°C
-7.5
-20
1.25
5
10
-3.5
CONDITIONS
MIN
2.5
2.28
2.85
-0.3
0.5
23
±1
250
+7.5
+20
3.0
TYP
MAX
4.5
3.48
3.15
+5.5
2
40
+3.5
UNITS
V
V
V
V
µA
%
ms
mV/cell
mV/cell
V
V
V
V
µA
s
Electrical Characteristics (I
2
C Interface)
(2.5V < V
DD
< 4.5V, -20°C < T
A
< +70°C, unless otherwise noted.) (Note 1)
PARAMETER
SCL Clock Frequency
Bus Free Time Between a STOP and
START Condition
START Condition (Repeated) Hold
Time
Low Period of SCL Clock
SYMBOL
f
SCL
t
BUF
t
HD:STA
t
LOW
(Note 8)
(Note 7)
CONDITIONS
MIN
0
1.3
0.6
1.3
TYP
MAX
400
UNITS
kHz
µs
µs
µs
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Maxim Integrated
│
2
MAX17058/MAX17059
1-Cell/2-Cell Fuel Gauge with ModelGauge
Electrical Characteristics (I
2
C Interface) (continued)
(2.5V < V
DD
< 4.5V, -20°C < T
A
< +70°C, unless otherwise noted.) (Note 1)
PARAMETER
High Period of SCL Clock
Setup Time for a Repeated START
Condition
Data Hold Time
Data Setup Time
Rise Time of Both SDA and SCL
Signals
Fall Time of Both SDA and SCL
Signals
Setup Time for STOP Condition
Spike Pulse Widths Suppressed by
Input Filter
Capacitive Load for Each Bus Line
SCL, SDA Input Capacitance
Note 1:
SYMBOL
t
HIGH
t
SU:STA
t
HD:DAT
t
SU:DAT
t
R
t
F
t
SU:STO
t
SP
C
B
C
B,IN
(Note 11)
(Note 12)
(Notes 9, 10)
(Note 9)
CONDITIONS
MIN
0.6
0.6
0
100
20 + 0.1C
B
20 + 0.1C
B
0.6
0.6
50
400
60
300
300
0.9
TYP
MAX
UNITS
µs
µs
µs
ns
ns
ns
µs
ns
pF
pF
Specifications are tested 100% at T
A
= +25°C. Limits over the operating range are guaranteed by design and
characterization.
Note 2:
All voltages are referenced to GND.
Note 3:
Test is performed on unmounted/unsoldered ports.
Note 4:
The voltage is trimmed and verified with 16x averaging.
Note 5:
This current is always present.
Note 6:
The IC enters sleep mode after SCL < V
IL
and SDA < V
IL
for longer than 2.5s.
Note 7:
Timing must be fast enough to prevent the IC from entering sleep mode due to bus low for period > t
SLEEP
.
Note 8:
f
SCL
must meet the minimum clock low time plus the rise/fall times.
Note 9:
The maximum t
HD:DAT
has to be met only if the device does not stretch the low period (t
LOW
) of the SCL signal.
Note 10:
This device internally provides a hold time of at least 100ns for the SDA signal (referred to the V
IH,MIN
of the SCL signal)
to bridge the undefined region of the falling edge of SCL.
Note 11:
Filters on SDA and SCL suppress noise spikes at the input buffers and delay the sampling instance.
Note 12:
C
B
is total capacitance of one bus line in pF.
SDA
t
F
t
LOW
t
R
t
SU:DAT
t
F
t
HD:STA
t
SP
t
R
t
BUF
SCL
t
HD:STA
S
t
SU:STA
Sr
t
SU:STO
P
S
t
HD:DAT
Figure 1. I
2
C Bus Timing Diagram
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Maxim Integrated
│
3
MAX17058/MAX17059
1-Cell/2-Cell Fuel Gauge with ModelGauge
Typical Operating Characteristics
(T
A
= +25°C, battery is Sanyo UF504553F, unless otherwise noted.)
MAX17058 toc01
QUIESCENT CURRENT (µA)
30
25
20
15
10
5
0
2.5
3.0
T
A
= +70°C
VOLTAGE ADC ERROR (mV/CELL)
35
15
10
5
0
-5
-10
-15
-20
-20
V
CELL
= 2.5V
V
CELL
= 3.6V
V
CELL
= 4.5V
T
A
= +25°C
T
A
= -20°C
3.5
V
CELL
(V)
4.0
4.5
-5
10
25
40
55
70
TEMPERATURE (°C)
ERROR
10
REFERENCE SOC
100
REFERENCE SOC
100
SOC ACCURACY T
A
= 0°C
MODELGAUGE SOC
SOC ACCURACY T
A
= +20°C
MODELGAUGE
ERROR
10
MAX17058 toc03
MAX17058 toc04
75
SOC (%)
5
ERROR (%)
SOC (%)
MAX17058 toc02
40
QUIESCENT CURRENT vs. SUPPLY
VOLTAGE (ACTIVE MODE)
20
VOLTAGE ADC ERROR vs. TEMPERATURE
75
5
ERROR (%)
50
0
50
0
25
-5
25
-5
0
0
2
4
6
8
10
-10
0
-2
0
2
4
TIME (Hr)
6
8
10
-10
TIME (Hr)
REFERENCE SOC
100
SOC ACCURACY T
A
= +40°C
MODELGAUGE SOC
ERROR
10
MAX17058 toc05
75
SOC (%)
5
ERROR (%)
50
0
25
-5
0
0
2
4
6
8
10
-10
TIME (Hr)
www.maximintegrated.com
Maxim Integrated
│
4
MAX17058/MAX17059
1-Cell/2-Cell Fuel Gauge with ModelGauge
Typical Operating Characteristics (continued)
(T
A
= +25°C, battery is Sanyo UF504553F, unless otherwise noted.)
当今的计算机外部设备，都在追求高速度和高通用性。为了满足用户的需求，以Intel为首的七家公司于1994年推出了USB（Universal Serial Bus，通用串行总线）总线协议，专用于低、中速的计算机外设。目前，USB端口已成为微机主板的标准端口；而在不久的将来，所有的微机外设，包括键盘、鼠标、显示器、打印机、数字相机、扫描仪和游戏柄等等，都将通过USB与主机相连。
...[详细]
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