Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Maximum Die Temperature..............................................+150°C
Lead Temperature (soldering, 10s) .................................+300°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
(V
IN
= 4.5V, EN = IN,
T
A
= 0°C to +85°C,
unless otherwise noted.)
PARAMETER
Input Supply Voltage
Input Undervoltage Lockout
Input Undervoltage Lockout Hysteresis
Input Supply Current
Operating, EN = IN, no load
Shutdown, EN = GND
SELI = GND (100mA mode),
V
IN
= 4.35V
SELI = IN (500mA mode)
BATT rising, transition from precondition to
charge mode
V
IN
= V
CHG
= 6.5V
I
SINK
= 10mA
V
SELI
= V
IN
= 5.5V, V
BATT
= 2.7V
SELI = GND, V
IN
= 5.5V, V
BATT
= 2.7V
V
BATT
= 2V, SELI = GND or IN
SELV = GND, I
BATT
= 0
SELV = IN, I
BATT
= 0
V
BATT
= 4.2V, EN = IN = GND
EN = GND, V
BATT
= 4.2V
V
IN
= 4.35V to 6.5V
V
IN
= 4.35V to 6.5V
V
IN
= 0 to 6.5V; V
SELI
, V
EN
= 6.5V or GND
V
IN
= 0 to 6.5V, V
SELV
= V
IN
or GND
Die temperature beyond which charging
current is reduced
125
2.0
1
1
2.3
I
IN
rising
CONDITIONS
MIN
4.35
3.75
50
0.9
2.5
100
200
2.5
80
0.1
455
85
43
4.10
4.20
1
0.1
1.0
0.4
500
100
70
4.12
4.22
5
2
0.8
2.7
V
mV
µA
V
mA
2.0
5.0
TYP
MAX
6.50
4.05
UNITS
V
V
mV
mA
µA
mV
Charging Headroom
Precondition Threshold
Precondition Threshold Hysteresis
CHG
Output Leakage Current
CHG
Output Low Voltage
Charging Current
BATT Regulation Voltage
BATT Leakage Current (Input
Power Removed)
BATT Shutdown Current
Logic Input Low Voltage (EN, SELI, SELV)
Logic Input High Voltage (EN, SELI, SELV)
Logic Input Leakage Current (EN, SELI)
Logic Input Leakage Current (SELV)
Thermal Regulation
20
4.08
4.18
V
µA
µA
V
V
µA
µA
°C
2
Maxim Integrated
MAX1811
USB-Powered Li+ Charger
ELECTRICAL CHARACTERISTICS
(V
IN
= 4.5V,
T
A
= -40°C to +85°C,
unless otherwise noted.) (Note1)
PARAMETER
Input Supply Voltage
Input Undervoltage Lockout
Input Supply Current
Precondition Threshold
BATT Regulation Voltage
BATT Leakage Current (Input
Power Removed)
BATT Shutdown Current
I
IN
rising
Operating, EN = IN, no load
Shutdown, EN = GND
BATT rising, transition from precondition to
charge mode
SELV = GND, I
BATT
= 0
SELV = IN, I
BATT
= 0
V
BATT
= 4.2V, IN = GND
EN = GND, V
BATT
= 4.2V
2.3
4.06
4.16
CONDITIONS
MIN
4.35
3.75
TYP
MAX
6.50
4.05
3
6
2.7
4.14
4.24
10
3
UNITS
V
V
mA
µA
V
V
µA
µA
Note 1:
Specifications to -40°C are guaranteed by design and not production tested.
Typical Operating Characteristics
(CHG unconnected, C
BATT
= 2.2µF, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. INPUT VOLTAGE (ENABLED)
0.9
0.8
0.7
I
IN
(mA)
I
IN
(µA)
0.6
0.5
0.4
0.3
0.2
0.1
0
0
1
2
3
4
5
6
7
V
IN
(V)
V
SELI
= V
IN
V
SELI
= 0
V
IN
= V
EN
= V
SELV
MAX1811 toc01
SUPPLY CURRENT vs. INPUT VOLTAGE
(SHUTDOWN)
MAX1811 toc02
CHARGE CURRENT
vs. INPUT VOLTAGE HEADROOM
450
400
350
I
BATT
(mA)
300
250
200
150
100
50
0
V
SELI
= 0
V
BATT
= 4.1V
V
SELV
= V
IN
V
SELI
= V
IN
MAX1811 toc03
1.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
1
2
3
4
5
6
7
V
IN
(V)
V
IN
= V
SELV
V
EN
= 0
500
0
0.5
1.0
1.5
2.0
2.5
3.0
V
IN
- V
BATT
(V)
Maxim Integrated
3
MAX1811
USB-Powered Li+ Charger
Typical Operating Characteristics (continued)
(CHG unconnected, C
BATT
= 2.2µF, T
A
= +25°C, unless otherwise noted.)
CHARGE CURRENT
vs. BATTERY CURRENT
MAX1811 toc04
CHARGE CURENT
vs. INPUT VOLTAGE
MAX1811 toc05
BATTERY REGULATION VOLTAGE
vs. TEMPERATURE
MAX1811 toc06
500
450
400
350
I
BATT
(mA)
300
250
200
150
100
50
0
-50
0
V
SELI
= 0
V
SELI
= V
IN
V
IN
= V
EN
= V
SELV
= 5.5V
500
450
400
350
I
BATT
(mA)
V
BATT
= 4.1V
V
SELV
= V
IN
4.22
4.20
4.18
V
BATT
(V)
V
SELV
= V
IN
300
250
200
150
100
50
0
V
SELI
= V
IN
V
SELI
= 0
4.16
4.14
4.12
4.10
4.08
V
IN
= V
SELI
= V
EN
= 4.5V
I
BATT
= 0
V
SELV
= 0
-40
-15
10
35
60
85
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
V
BATT
(V)
0
1
2
3
4
5
6
7
V
IN
(V)
TEMPERATURE (°C)
CHARGE CURRENT
vs. TEMPERATURE
MAX1811 toc07
CHARGE CURRENT vs. TEMPERATURE
WITH THERMAL REGULATION
V
IN
= V
SELV
= V
EN
= 6.5V, V
BATT
= 2.7V
MAX1811 toc08
600
500
400
I
BATT
(mA)
300
200
100
0
-40
V
IN
= V
SELV
= V
EN
= 5.5V, V
BATT
= 2.7V
600
500
V
SELI
= V
IN
I
BATT
(mA)
V
SELI
= V
IN
400
300
200
THERMAL CONTROL
LOOP IN OPERATION
V
SELI
= 0
100
0
V
SELI
= 0
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
4
Maxim Integrated
MAX1811
USB-Powered Li+ Charger
Pin Description
PIN
1
NAME
SELV
DESCRIPTION
Battery Regulation Voltage-Select Input. A low (< 0.8V) selects a 4.1V battery regulation set point. A high
(> 2.0V) selects a 4.2V battery regulation set point.
Battery Regulation Current-Select Input. A low (< 0.8V) selects a 100mA maximum battery regulation
current. A high (> 2.0V) selects a 500mA maximum battery regulation current. SELI is not diode clamped
to IN, and the voltage at V
SELI
can exceed the voltage at V
IN
.
Ground. Connect pins 3 and 6 to a large copper trace for maximum power dissipation.
Input Supply Voltage. Bypass with a 4.7µF capacitor to GND.
Li+ Battery Connection. Bypass with a capacitor no less than 2.2µF to GND. High impedance in
shutdown.
Enable Input. A high (> 2.0V) enables the device. A low (< 0.8V) disables the device and places it into
shutdown mode. BATT is high impedance when disabled.
Charging Indicator Open-Drain Output.
CHG
pulls low while the device is in charge mode (2.5V
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