Is o la t e d Tra n s fo rm e r Drive r
fo r P CMCIA Ap p lic a t io n s
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V ) ...............................................-0.3V to +7V
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10sec) .............................+300°C
CC
Control Input Voltage (SD, FS) ...................-0.3V to (V + 0.3V)
CC
Peak Output Switch Current (D1, D2)......................................1A
Output Switch Voltage (D1, D2).............................................12V
Average Output Switch Current (D1, D2) .........................200mA
Continuous Power Dissipation (T = +70°C)
A
SO (derate 5.88mW/°C above +70°C).........................471mW
µMAX (derate 4.10mW/°C above +70°C) ....................330mW
MAX845
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 = 5V ±10%, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
CC
A
MIN
PARAMETER
CONDITIONS
MIN
TYP
1.5
MAX
4.0
UNITS
Switch On-Resistance
Switch Frequency
D1, D2; 100mA
FS = V = 4.5V
Ω
450
550
675
860
500
575
1.1
900
CC
FS = V = 5.5V
1100
CC
kHz
FS = 0V, V = 4.5V
CC
FS = 0V, V = 5.5V
CC
Operating Supply Current (Note 1)
Shutdown Supply Current (Note 2)
No load, SD = 0V, FS = V
5.0
0.8
mA
µA
CC
SD = V
0.4
CC
High
Low
2.4
2.4
Shutdown Input Threshold
Shutdown Input Leakage Current
FS Input Threshold
V
pA
V
10
High
Low
0.8
50
FS = 0V
FS Input Current
µA
V
FS = V
10
CC
Minimum Start-Up Voltage
2.5
2.2
Note 1: Operating supply current is the current used by the MAX845 only. Load current is not included.
Note 2: Shutdown supply current includes output switch leakage currents.
2
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
