Rainbow-electronics MAX8715 Manual do Utilizador descarregar pdf (Página 4)

MAX1790/MAX8715

Low-Noise Step-Up DC-DC Converters

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= SHDN = 3V, FREQ = GND, T

= -40°C to +85°C, unless otherwise noted.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

N-CHANNEL SWITCH

MAX1790 1.2 2.3

Current Limit I

LIM

= 1V,

duty cycle =

65% (Note 1)

MAX8715 1.8 3.0

MAX1790 0.5

On-Resistance R

MAX8715

0.35

Ω

MAX1790

0.30 0.65

Current-Sense Transresistance R

MAX8715

0.20 0.43

V/A

CONTROL INPUTS

Input Low Voltage V

SHDN, FREQ

0.3 x V

Input High Voltage V

SHDN, FREQ

0.7 x V

Note 1: Current limit varies with duty cycle due to slope compensation. See the Output-Current Capability section.

Note 2: Specifications to -40°C are guaranteed by design and not production tested.

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Rainbow-electronics MAX8715 Manual do Utilizador Página 4