Rainbow-electronics MAX776 Manual de usuario descargar pdf (Pagina 3)

MAX774/MAX775/MAX776

-5V/-12V/-15V or Adjustable,

High-Efficiency, Low I

Inverting DC-DC Controllers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

EXT Rise Time

SYMBOL

MIN TYP MAX

160 210 260

UNITS

CS Input Current ±1

µA

Switch Maximum On-Time t

(max) 12 16 20

µs

Switch Minimum Off-Time t

OFF

(max) 1.8 2.3 2.8

3V ≤ V+ ≤ 16.5V

µs

EXT Fall Time

MAX77_M

V+ = 12V

50 ns

EXT

= 1nF, V+ = 12V

EXT

= 1nF, V+ = 12V

Efficiency

(Circuit of Figure 2—

Bootstrapped)

SHDN Input Current ±1

µA

SHDN Input Voltage High V

1.6 V

SHDN Input Voltage Low V

0.4 V

Current-Limit Trip Level

(V+ – CS)

180 210 240

CONDITIONS

MAX775, V+ = 5V, I

LOAD

= 500mA

MAX776, V+ = 5V, I

LOAD

= 400mA

MAX774, V+ = 5V, I

LOAD

= 1A

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

3V ≤ V+ ≤ 16.5V

MAX77_C/E

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

MAX774/MAX775/MAX776 1
-5V/-12V/-15V or Adjustable 1
High-Efficiency, Low I 1
Inverting DC-DC Controllers 1

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Rainbow-electronics MAX776 Manual de usuario Pagina 3

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