Datasheet

2
Maxim Integrated
Dual-Input Linear Charger, Smart Power Selector
with Advanced Battery Temperature Monitoring
MAX8934G
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.
DC, PEN1 to GND .................................................-0.3V to +16V
USB to GND
............................................................-0.3V to +9V
V
L
to GND ...............................................................-0.3V to +4V
LDO to GND
......... -0.3V to the lower of +4V and (V
SYS
+ 0.3V)
THMEN, THMSW to GND
..................... -0.3V to +(V
LDO
+ 0.3V)
THM to GND
.......................................-0.3V to (V
THMSW
+ 0.3V)
PSET, ISET, CT to GND
............................... -0.3V to (V
L
+ 0.3V)
BATT, SYS, CEN, CHG, OT, DOK,
UOK, FLT, DONE, USUS, PEN2 to GND
.............-0.3V to +6V
EP (Exposed Pad) to GND
................................... -0.3V to +0.3V
DC Continuous Current (total in two pins)
....................2.4A
RMS
SYS Continuous Current (total in two pins) ...................2.4A
RMS
USB Continuous Current (total in two pins) ..................2.0A
RMS
BATT Continuous Current (total in two pins) .................2.4A
RMS
LDO Continuous Current .............................................50mA
RMS
LDO Short-Circuit Duration .........................................
Continuous
Continuous Power Dissipation (T
A
= +70NC)
Single-Layer Board
(derate 20.8mW/NC above +70NC)
......................1666.7mW
Multilayer Board
(derate 28.6mW/NC above +70NC)
......................2285.7mW
Operating Temperature Range
.......................... -40NC to +85NC
Junction Temperature
...................................... -40NC to +125NC
Storage Temperature
....................................... -65NC to +150NC
Lead Temperature (soldering, 10s)
................................+300NC
Soldering Temperature (reflow)
......................................+260NC
ELECTRICAL CHARACTERISTICS
(V
DC
= V
PEN1
= V
PEN2
= 5V, CEN = USUS = THMEN = GND, V
BATT
= 4V, V
THM
= 1.65V, USB, THMSW, CHG, DONE, OT, DOK,
UOK, FLT are unconnected, C
CT
= 0.068FF, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
= +25NC.) (Note 1)
ABSOLUTE MAXIMUM RATINGS
PARAMETER CONDITIONS MIN TYP MAX UNITS
DC-to-SYS PREREGULATOR
DC Operating Voltage Range 4.1 6.6 V
DC Withstand Voltage V
BATT
= V
SYS
= 0V 14 V
DC Undervoltage Threshold
When V
DOK
goes low, V
DC
rising, 500mV hysteresis
3.95 4.0 4.05 V
DC Overvoltage Threshold
When V
DOK
goes high, V
DC
rising, 360mV hysteresis
6.8 6.9 7.0 V
DC Operating Supply Current
I
SYS
= I
BATT
= 0mA, V
CEN
= 0V
1 2
mA
I
SYS
= I
BATT
= 0mA, V
CEN
= 5V
0.8 1.5
DC Suspend Current
V
DC
= V
CEN
= V
USUS
= 5V, V
PEN1
= 0V
195 340
FA
DC-to-SYS On-Resistance
I
SYS
= 400mA, V
CEN
= 5V
0.2 0.35
I
DC to BATT Dropout Voltage
When SYS regulation and charging stops, V
DC
falling,
150mV hysteresis
10 50 90 mV
DC Current Limit
V
DC
= 5V, V
SYS
= 4V,
T
A
= +25NC
R
PSET
= 1.5kI
1800 2000 2200
mA
R
PSET
= 3kI
900 1000 1100
R
PSET
= 6.3kI
450 475 500
V
PEN1
= 0V, V
PEN2
= 5V
(500mA USB mode)
450 475 500
V
PEN1
= V
PEN2
= 0V
(100mA USB mode)
80 95 100
PSET Resistance Range 1.5 6.3
kI
SYS Regulation Voltage
V
DC
= 6V, I
SYS
= 1mA to 1.75A, V
CEN
= 5V
4.29 4.35 4.4 V
Input Current Soft-Start Time
Connecting DC with USB not present 1.5 ms
Connecting DC with USB present 50
Fs
Thermal-Limit Temperature
Die temperature at when the charging current and input
current limits are reduced
100
NC
Thermal-Limit Gain
I
SYS
reduction with die temperature (above +100NC)
5 %/C
V
L
Voltage I
VL
= 0 to 5mA, USB = unconnected 3 3.3 3.6 V