MAX738ACWE 参数 Datasheet PDF下载

5V, Step-Down,

Current-Mode PWM DC-DC Converters

MAX730A/MAX738A/MAX744A

ABSOLUTE MAXIMUM RATINGS

Pin Voltages

V+ (MAX730A) ......................................................+12V, -0.3V

V+ (MAX738A/MAX744A) .....................................+18V, -0.3V

LX (MAX730A) .................................(V+ - 12V) to (V+ + 0.3V)

LX (MAX738A/MAX744A) ................(V+ - 21V) to (V+ + 0.3V)

OUT .................................................................................±25V

SS, CC,

SHDN

.........................................-0.3V to (V+ + 0.3V)

Peak Switch Current (I

LX

) ........................................................2A

Reference Current (I

REF

) ...................................................2.5mA

Continuous Power Dissipation (T

A

= +70°C)

8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)...727mW

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_ _/AE_ _...................................................+150°C

MAX7_ _AMJA.............................................................+175°C

Storage Temperature Range ............................-65°C to +160°C

Lead Temperature (soldering, 10sec).............................+300°C

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+ = 9V for the MAX730A, V+ = 12V for the MAX738A/MAX744A, I

LOAD

= 0mA, T

A

= T

MIN

to T

MAX

,

unless otherwise noted.)

PARAMETER

CONDITIONS

0mA < I

LOAD

< 450mA,

MAX730AC

V+ = 6.0V

to 11.0V

0mA < I

LOAD

< 450mA,

MAX730AE

0mA < I

LOAD

< 300mA,

MAX730AM

0mA < I

LOAD

< 450mA,

MAX738AC/AE

V+ = 6.0V

to 16.0V

0mA < I

LOAD

< 350mA,

MAX738AM

0mA < I

LOAD

< 500mA,

MAX744AC/AE

0mA < I

LOAD

< 375mA,

MAX744AM

V+ = 10.2V to 16.0V,

0mA < I

LOAD

< 750mA

0mA < I

LOAD

< 750mA,

MAX744AC/AE

4.75 5.00

0mA < I

LOAD

< 600mA,

MAX744AM

5.2

V+ = 5.2V to 11.0V

V+ = 6.0V to 16.0V

0.15

0.15

0.15

11.0

6.0

16.0

6.0

16.0

V

%/V

5.25

4.75 5.00

5.25

4.75 5.00

5.25

MAX730A

MIN TYP MAX

MAX738A

MIN TYP MAX

MAX744A

MIN TYP MAX

UNITS

Output Voltage

4.75 5.00

5.25

4.75 5.00

5.25

V

V+ = 9.0V

to 16.0V

Input Voltage

Range

Line Regulation

2

_______________________________________________________________________________________