MAX745 Maxim, MAX745 Datasheet - Page 2

• Manufacturer Part Number: MAX745
• Description: Switch-Mode Lithium-Ion Battery-Charger
• Manufacturer: Maxim

ABSOLUTE MAXIMUM RATINGS
DCIN to GND ............................................................-0.3V to 26V
BST, DHI to GND ......................................................-0.3V to 30V
BST to LX ....................................................................-0.3V to 6V
DHI to LX............................................(LX - 0.3V) to (BST + 0.3V)
LX to GND ................................................-0.3V to (DCIN + 0.3V)
VL to GND...................................................................-0.3V to 6V
CELL0, CELL1, IBAT, STATUS, CCI, CCV,
REF, SETI, VADJ, DLO,
Switch-Mode Lithium-Ion
Battery Charger
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
2
SUPPLY AND REFERENCE
SWITCHING REGULATOR
DCIN Input Voltage Range
DCIN Quiescent Supply Current
VL Output Voltage
REF Output Voltage
REF Output Load Regulation
Oscillator Frequency
DHI Maximum Duty Cycle
DHI On-Resistance
DLO On-Resistance
BATT Input Current
CS Input Current
BATT, CS Input Voltage Range
CS to BATT Offset Voltage (Note 1)
CS to BATT
Current-Sense Voltage
Absolute Voltage Accuracy
DCIN
_______________________________________________________________________________________
= 18V, V
PARAMETER
BATT
= 8.4V, T
THM/SHDN to GND ..-0.3V to (VL + 0.3V)
A
= 0°C to +85°C. Typical values are at T
6.0V < V
6.0V < V
T
6.0V < V
0 < I
Output high or low
Output high or low
VL < 3.2V, V
VL > 5.15V, V
VL < 3.2V, V
VL > 5.15V, V
4V < V
SETI = V
SETI = 400mV
Not including VADJ resistor tolerance
With 1% tolerance VADJ resistors
A
= +25°C
REF
BATT
DCIN
DCIN
DCIN
< 1mA
REF
< 16V
BATT
CS
(full scale)
BATT
CS
< 24V, logic inputs = VL
< 24V, no load
< 24V
= 12V
CONDITIONS
= 12V
= 12V
= 12V
BATT, CS to GND .....................................................-0.3V to 20V
PGND to GND..........................................................-0.3V to 0.3V
VL Current ...........................................................................50mA
Continuous Power Dissipation (T
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature.........................................-60°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
SSOP (derate 8.00mW/°C above +70°C) ......................640mW
A
= +25°C, unless otherwise noted.)
-0.65
-0.75
5.15
4.17
4.16
MIN
270
170
89
14
6
0
A
= +70°C)
5.40
±1.5
TYP
300
185
4.2
4.2
10
93
18
4
4
6
MAX
5.65
4.23
4.24
0.65
0.75
330
500
400
205
24
20
14
19
22
6
7
5
5
mV/mA
UNITS
kHz
mA
mV
mV
%
%
V
V
V
V
A
A