Ad va n c e d Ch e m is t ry-In d e p e n d e n t , Le ve l 2
Ba t t e ry Ch a rg e r w it h In p u t Cu rre n t Lim it in g
ABSOLUTE MAXIMUM RATINGS
DCIN, CVS, CSSP, CSSN, LX to GND....................-0.3V to +30V
CSSP to CSSN, CSIP to CSIN ...............................-0.3V to +0.3V
V
, SCL, SDA, INT, DLOV to GND.........................-0.3V to +6V
DD
THM to GND...............................................-0.3V to (V + 0.3V)
DD
PDS, PDL to GND ...................................-0.3V to (V
BST to LX..................................................................-0.3V to +6V
DHI to LX...................................................-0.3V to (V + 0.3V)
+ 0.3V)
PGND to GND .......................................................-0.3V to +0.3V
LDO Continuous Current.....................................................50mA
CSSP
Continuous Power Dissipation (T = +70°C)
BST
A
CSIP, CSIN, BATT to GND .....................................-0.3V to +22V
28-Pin QSOP (derate 10.8mW/°C above +70°C).......860mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature .........................................-60°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
LDO to GND.....................-0.3V to (lower of 6V or V
+ 0.3V)
+ 0.3V)
+ 0.3V)
DCIN
DLO to GND ...........................................-0.3V to (V
DLOV
REF, DAC, CCV, CCI, CCS, CLS to GND.....-0.3V to (V
LDO
MAX1645
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
(Circuit of Figure 1, V = +3.3V, V
= +16.8V, V
= +18V, T = 0°C to +85°C, unless otherwise noted. Typical values are at
DD
BATT
DCIN
A
T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
GENERAL SPECIFICATIONS
DCIN Typical Operating Range
DCIN Supply Current
V
8
28
6
V
DCIN
I
8V < V
< 28V
1.7
0.7
mA
DCIN
DCIN
DCIN Supply Current Charging
Inhibited
8V < V
< 28V
2
mA
DCIN
DCIN rising
DCIN falling
7.5
7.4
5.4
7.85
When AC_PRESENT
switches
DCIN Undervoltage Threshold
LDO Output Voltage
V
V
V
7
V
8V < V
< 28V, 0 < I
< 15mA
LDO
5.15
5.65
5.65
2.8
LDO
DCIN
V
DD
Input Voltage Range
8V < V
< 28V
2.8
2.1
DCIN
(Note 1)
V
rising
falling
2.55
2.5
DD
When the SMB res-
ponds to commands
V
Undervoltage Threshold
Quiescent Current
V
DD
V
DD
0 < V
< 6V, V = 5V, V
= 5V,
DCIN
DD
SCL
V
DD
I
DD
80
150
4.126
2.8
µA
V
V
SDA
= 5V
REF Output Voltage
V
REF
0 < I
< 200µA
4.066
2.4
4.096
REF
BATT Undervoltage Threshold
(Note 2)
When I
drops to 128mA
V
CHARGE
PDS Charging Source Switch
Turn-Off Threshold
V
V
referred to V
, V
falling
50
100
8
100
200
10
150
300
mV
mV
V
PDS-OFF
CVS
BATT CVS
PDS Charging Source Switch
Threshold Hysteresis
V
V
CVS
referred to V
= 0
PDS-HYS
BATT
PDS Output Low Voltage, PDS
Below CSSP
I
12
PDS
PDS Turn-On Current
PDS Turn-Off Current
PDS = CSSP
= V
100
10
150
50
300
µA
V
- 2V, V = 16V
DCIN
mA
PDS
CSSP
PDL Load Switch Turn-Off
Threshold
V
V
CVS
referred to V , V rising
BATT CVS
-150
-100
-50
mV
PDL-OFF
2
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
