Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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
(V
CHG
= +4.3V,
Figure 1,
T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
= +25NC.) (Note 1)
PARAMETER
CHG Input Maximum Voltage
CHG Enable Threshold
CHG Quiescent Current
CHG Shunt Delay
CHG Input Shunt Limit
CHG Maximum Input Current
(Note 2)
V
CHG
input current limited by Absolute
Maximum Ratings
V
CHG
= 4.0V, I
CHG
= 1FA
CHG-to-BATT Dropout Voltage
V
CHG
= 4.0V, I
BATT
= -6mA
V
CHG
= 4.0V, I
BATT
= -20mA
V
CHG
= 4.0V, I
BATT
= -40mA
BATT REG
BATT Regulator Voltage
BATT Regulation Delay
V
CHG
= 4.2V, starting at 4V
Regulator in dropout;
V
CHG
= 4.15V, V
BATT
= 4.12V
Harvest standby (AE pulse low)
V
CHG
= 0V, V
BATT
= 2.1V to 4.0V
AE regulator on, boost off;
V
CHG
= 0V, V
BATT
= 4.0V, AE high
LCE regulator on, boost off;
V
BATT
= 4.0V, LCE mode (Note 3)
4.065
4.125
30
450
1
725
150
1030
165
1650
550
nA
4.160
V
Fs
50
100
45
55
65
100
mV
V
CE
I
QCHG
V
CHG
= 4.0V rising, V
BATT
= 4.0V
SYMBOL
CONDITIONS
Limited by shunt regulator (Note 2)
MIN
4.875
4.07
TYP
5.3
4.15
625
25
50
MAX
5.7
4.21
1300
UNITS
V
V
nA
Fs
mA
mA
BATT Quiescent Current
I
QBATT
Maxim Integrated
2
MAX17710
Energy-Harvesting Charger and Protector
ELECTRICAL CHARACTERISTICS (continued)
(V
CHG
= +4.3V,
Figure 1,
T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
= +25NC.) (Note 1)
PARAMETER
LINEAR LDO REGULATOR
V
PCKP
= 4.0V, I
REG
= 50FA, SEL1 = open
REG Voltage
V
PCKP
= 4.0V, I
REG
= 50FA, SEL1 = GND
V
PCKP
= 4.0V, I
REG
= 50FA, SEL1 = BATT
REG Voltage, LCE Mode
(Note 3)
V
PCKP
= 4.0V, I
REG
= 50FA, SEL1 = open
V
PCKP
= 4.0V, I
REG
= 50FA, SEL1 = GND
V
PCKP
= 4.0V, I
REG
= 50FA, SEL1 = BATT
V
REG
= 2.15V, V
PCKP
= 3.8V, AE high
REG Current Limit
REG Startup Time
LCE Threshold High (Note 4)
V
IH-LCE
V
REG
= 2.15V, V
PCKP
= 3.8V, LCE mode
(Note 3)
V
PCKP
= 4.0V, AE rising, C
REG
= 1FF
SEL1 = open
SEL1 = GND
SEL1 = BATT
SEL1 = open
LCE Threshold Low (Note 5)
PCKP REGULATOR
AE Threshold High
AE Threshold Low
AE Low Input Current
AE High Input Current
PCKP Enable Threshold
PCKP Charge Current
PCKP Impedance Ramp Rate
BATT Undervoltage Lockout
(UVLO) Delay
BATT UVLO Delay
BATT UVLO Threshold
t
UVLO1
t
UVLO2
V
IH-AE
V
IL-AE
V
AE
= 0V, persists < 1Fs
V
AE
= 0V, persists > 1Fs
V
AE
= 3.6V
REG enabled
V
PCKP
= 0V, V
BATT
= 2.2V
V
BATT
= 4.0V, resistance between BATT
and PCKP from high impedance to 5I
V
BATT
= 2.15V, AE high, first ramp of
PCKP
V
BATT
= 2.15V, AE high, not first PCKP
ramp
AE regulator active, LCE regulator inactive
LCE regulator active, AE regulator inactive
1.990
3.62
-4
-2
1
1
3.7
100
5
5
0.5
2.15
3
2.30
3.78
1.13
0.15
V
V
FA
nA
nA
V
mA
ms
s
ms
V
V
IL-LCE
SEL1 = GND
SEL1 = BATT
2.175
1.575
1.30
0.9
0.6
0.5
V
V
3.22
2.25
1.75
2.9
2.1
1.6
75
50
5.3
3.3
2.3
1.8
3.3
2.3
1.8
3.37
2.375
1.9
3.7
2.5
2.05
V
mA
FA
ms
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Maxim Integrated
3
MAX17710
Energy-Harvesting Charger and Protector
ELECTRICAL CHARACTERISTICS (continued)
(V
CHG
= +4.3V,
Figure 1,
T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
= +25NC.) (Note 1)
PARAMETER
BOOST REGULATOR
CHG Regulation Voltage
Frequency
Boost Turn-On Time
FB Threshold
FB Input Current Low
LX nMOS On-Resistance
R
DS-ON
FB
ON
FB
OFF
V
BATT
= 4.125V
V
BATT
= 3.9V, V
CHG
= 3.95V
t
BOOST-ON
Design guidance, typical only
Rising (enable)
Falling (disable), V
CHG
= 3.8V
V
FB
= GND, momentary
I
LX
= 20mA, V
BATT
= 3.8V, SEL2 = GND
I
LX
= 10mA, V
BATT
= 3.8V, SEL2 = open
0.275
4
0.485
0.22
4.3
0.73
4.5
1
850
0.75
0.25
600
0.5
8
0.7
12
1.0
0.27
4.7
1.27
V
MHz
ns
V
nA
I
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1:
Specifications are 100% production tested at T
A
= +25NC. Limits over the operating temperature range are guaranteed by
design and characterization.
Note 2:
Since the CHG shunt regulator has a 25Fs delay, the user must limit the voltage to the Absolute Maximum Rating until the
internal CHG shunt provides the voltage limit at the pin in response to 50mA input. Larger currents must be shunted with
an external clamp to protect the CHG pin from damage.
Note 3:
LCE mode is entered by pulsing AE high, then pulsing AE low.
Note 4:
For logic-high, connect LCE to the REG output. Do not connect to the BATT or PCKP pins.
Note 5:
Since LCE is compared to the REG pin voltage for operation, the low-power regulator cannot be switched off under condi-
tions where the REG output is shorted to GND.
Maxim Integrated
4
MAX17710
Energy-Harvesting Charger and Protector
Table 1. Summary of Typical Quiescent Current vs. Operating Conditions
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