Rainbow-electronics MAX652 Bedienungsanleitung PDF herunterladen (Seite 3)

MAX649/MAX651/MAX652

5V/3.3V/3V or Adjustable, High-Efficiency,

Low I

, Step-Down DC-DC Controllers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V+ = 5V, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER

SYMBOL MIN TYP MAX

-45

UNITS

V+ = 16.5V, SHDN = 0V or V+

-45

SHDN Input Current 1 µA

Output Voltage

Load Regulation

-47

mV/A

CONDITIONS

Circuit of

Figure 1

MAX649, 0 ≤ I

LOAD

≤ 1.5A,

= 10V

MAX651, 0 ≤ I

LOAD

≤ 1.5A,

= 5V

MAX652, 0 ≤ I

LOAD

≤ 1.5A,

= 5V

MAX649, V+ = 10V,

LOAD

= 1A

MAX651, V+ = 5V,

LOAD

= 1A

MAX652, V+ = 5V,

LOAD

= 1A

Efficiency

Circuit of

Figure 1

4V ≤ V+ ≤ 16.5VSHDN Input Voltage High 1.6 VV

4V ≤ V+ ≤ 16.5V 0.4 VV

SHDN Input Voltage Low

4V ≤ V+ ≤ 16.5VCS Input Current ±1 µA

V+ = 12V 12 16 20 µs

(max)

Switch Maximum

On-Time

EXT

= 0.001µF, V+ = 12VEXT Rise Time 50 ns

EXT

= 0.001µF, V+ = 12VEXT Fall Time 50 ns

V+ = 12V

Switch Minimum

Off-Time

1.8 2.3 2.8 µs

OFF

(min)

MAX649C/E, MAX65_C/E

Current-Limit Trip

Level (V+ to CS)

180 210 240

mVV

MAX649M, MAX65_M 160 210 260

4V ≤ V+ ≤ 16.5V

1 2 3 4 5 6 7 8 ... 15 16

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