Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Bump Temperature (soldering, reflow) ............................+260°C
Note 1:
LX has an internal clamp diode to PGND. Applications that forward bias this diode should take care not to exceed the power
dissipation limits of the device.
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
= 3.6V, V
GND
= V
PGND
= 0V, V
DD
= 1.8V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
IN Supply Voltage
V
DD
Supply Voltage
IN Undervoltage Lockout
Threshold
IN Quiescent Current
IN Shutdown Current
V
DD
Standby Current
IN Standby Current
OUT Leakage Current
LED_ CURRENT REGULATORS
LED_ Current Regulator Dropout
Voltage (Note 2)
I
LED1
or I
LED2
= 25mA setting
I
LED3
or I
LED4
or I
LED5
= 5.0mA setting
I
LED1
or I
LED2
= 25.25mA
setting
LED_ Current Accuracy
I
LED3
or I
LED4
or I
LED5
= 5.0mA
setting
LED_ Leakage Current
LED_ Regulation Voltage
N-CHANNEL SWITCH
LX Current Limit
LX On-Resistance
I
LX
= 200mA
780
V
LED_
= 5.5V, V
DD
= GND
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +25°C
T
A
= +85°C
-2
-5
-2
-5
0.01
0.1
0.35
860
0.3
200
150
+2
+5
+2
+5
1
mV
mV
%
%
µA
V
mA
Ω
No load, 2MHz switching
V
DD
= GND
V
SDA
= V
SCL
= V
DD
V
SDA
= V
SCL
= V
DD
V
IN
= V
OUT
= 5.5V, V
DD
= GND
T
A
= +25°C
T
A
= +85°C
T
A
= +25°C
T
A
= +85°C
T
A
= +25°C
T
A
= +85°C
T
A
= +25°C
T
A
= +85°C
CONDITIONS
MIN
2.7
1.6
2.4
1.5
0.1
0.1
0.1
0.1
2
2
0.01
0.1
1
5
1
1
TYP
MAX
5.5
5.5
2.6
UNITS
V
V
V
mA
µA
µA
µA
µA
www.maximintegrated.com
Maxim Integrated | 2
MAX8831
High-Efficiency, White LED
Step-Up Converter with I
2
C
Interface in 2mm x 2mm WLP
Electrical Characteristics (continued)
(V
IN
= 3.6V, V
GND
= V
PGND
= 0V, V
DD
= 1.8V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
LX Leakage Current
OSCILLATOR
Operating Frequency
Maximum Duty Cycle
Minimum On-Time
COMP
Soft-Start Charge Current
COMP Input Resistance to GND
I
2
C INTERFACE
SDA, SCL Logic Input High
Voltage
SDA, SCL Logic Input Low
Voltage
SDA Output Low Voltage
SDA, SCL Logic Input Current
FAULT PROTECTION
Thermal Shutdown
Thermal-Shutdown Hysteresis
Output Overvoltage Threshold
Output Overvoltage Hysteresis
Open LED_ Sense Voltage
Shorted LED_ Sense Voltage
Open/Short LED Debounce Timer
LED_ enabled, measured at LED_
LED_ enabled, measured at LED_, V
OUT
= 10V
V
OUT
- 2.2V
V
OUT
rising
28
4
100
V
OUT
- 0.7V
16
120
Temperature rising
+160
20
30
°C
°C
V
V
mV
V
ms
V
DD
= 1.6V to 5.5V
V
DD
= 1.6V to 5.5V
I
SDA
= 3mA
V
IL
= 0V or V
IH
= 5.5V
T
A
= +25°C
T
A
= +85°C
0.03
0.01
0.1
0.7 x
V
DD
0.3 x
V
DD
0.4
1
V
V
V
µA
Step-up converter off
-20
20
µA
kΩ
V
LED1
or V
LED2
= 0.2V
Skip mode
1.8
87
2
92
30
2.2
100
MHz
%
ns
CONDITIONS
V
IN
= V
LX
= 5.5V, V
DD
= GND
T
A
= +25°C
T
A
= +85°C
MIN
TYP
0.01
0.1
MAX
1
UNITS
µA
www.maximintegrated.com
Maxim Integrated | 3
MAX8831
High-Efficiency, White LED
Step-Up Converter with I
2
C
Interface in 2mm x 2mm WLP
I
2
C Interface Timing Characteristics
(V
DD
= 1.6V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
I
2
C Clock Frequency
Bus-Free Time Between STOP
and START
Repeated START Condition Hold
Time
Repeated START Condition
Setup Time
STOP Condition Setup Time
SCL Clock Low Period
SCL Clock High Period
SDA Hold Time
SDA Setup Time
SYMBOL
f
SCL
t
BUF
t
HD_STA
t
SU_STA
t
SU_STO
t
LOW
t
HIGH
t
HD_DAT
t
SU_DAT
1.3
0.6
0.6
0.6
1.3
0.6
0
100
0.1
0.1
0.1
0.2
0.2
0.01
50
CONDITIONS
MIN
TYP
MAX
400
UNITS
kHz
µs
µs
µs
µs
µs
µs
µs
ns
Note 1:
All devices are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by
design.
Note 2:
LED dropout voltage is defined as the LED_ to GND voltage when current into LED_ drops 10% from the value at V
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