MAX748A/MAX763A
3.3V, Step-Down,
Current-Mode PWM DC-DC Converters
2 ________________________________________________________________________________________________
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 3, V+ = 5V, I
LOAD
= 0mA, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER CONDITIONS
MAX748A MAX763A
UNITS
MIN TYP MAX MIN TYP MAX
Input Voltage Range 3.3 16.0 3.3 11.0 V
C/E temp. ranges,
V+ = 4.0V to 16V, 3.135 3.3 3.465
0mA < I
LOAD
< 300mA
M temp. range,
V+ = 4.0V to 16V, 3.135 3.3 3.465
0mA < I
LOAD
< 250mA
C/E temp. ranges,
V+ = 4.75V to 16V, 3.135 3.3 3.465
0mA < I
LOAD
< 500mA
M temp. range,
V+ = 4.75V to 16V, 3.135 3.3 3.465
Output Voltage
0mA < I
LOAD
< 400mA
V
C/E temp. ranges,
V+ = 4.0V to 11V, 3.135 3.3 3.465
0mA < I
LOAD
< 300mA
M temp. range,
V+ = 4.0V to 11V, 3.135 3.3 3.465
0mA < I
LOAD
< 250mA
C/E temp. ranges,
V+ = 4.75V to 11V, 3.135 3.3 3.465
0mA < I
LOAD
< 500mA
M temp. range,
V+ = 4.75V to 11V, 3.135 3.3 3.465
0mA < I
LOAD
< 400mA
Line Regulation 0.13 0.13 %/V
Load Regulation I
LOAD
= 0mA to 500mA 0.001 0.001 %/mA
ABSOLUTE MAXIMUM RATINGS
Pin Voltages:
V+ (MAX748A)......................................................+17V, -0.3V
V+ (MAX763A)......................................................+12V, -0.3V
LX (MAX748A) .................................(V+ - 21V) to (V+ + 0.3V)
LX (MAX763A) .................................(V+ - 12V) to (V+ + 0.3V)
OUT.................................................................................±25V
SS, CC,
SHDN
..........................................-0.3V to (V+ + 0.3V)
Peak Switch Current (I
LX
).....................................................2.0A
Reference Current (I
REF
)...................................................2.5mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 6.90mW/°C above +70°C)...552mW
8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C)....762mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C).......640mW
Operating Temperature Ranges:
MAX7__AC__ ....................................................0°C to +70°C
MAX7__AE__ .................................................-40°C to +85°C
MAX7__AMJA__ ..........................................-55°C to +125°C
Junction Temperatures:
MAX7__AC/E ..............................................................+150°C
MAX7__AM.................................................................+175°C
Storage Temperature Range ............................-65°C to +160°C
Lead Temperature (soldering, 10sec) ............................+300°C
(25 paginas)
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