MAX4995ALAUT 查看數據表（PDF） - Maxim Integrated

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MAX4995ALAUT

50mA to 600mA Programmable Current-Limit Switches

Maxim Integrated 

50mA to 600mA Programmable

Current-Limit Switches

ELECTRICAL CHARACTERISTICS (continued)

(VIN = +1.7V to +5.5V, RSETI = 94.3kΩ, CIN = 1µF, and TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at VIN = +3.3V,

TA = +25°C.)

PARAMETER

FLAG OUTPUT

FLAG Output Logic-Low Voltage

FLAG Output Leakage Current

DYNAMIC

SYMBOL

CONDITIONS

ISINK = 1mA

VIN = VFLAG = 5.5V, FLAG deasserted

MIN TYP MAX UNITS

0.4

V

1

μA

Turn-On Time

tSS

VIN = 3.3V, COUT = 1μF, RL = 20 , Figure 1,

(Note 4)

120

μs

Turn-Off Time

tOFF

Switch from on to off, VIN = 3.3V, COUT = 1μF,

RL = 20 , Figure 1 (Note 4)

120

μs

VIN = 3.3V, RSETI =

MAX4995A/AL/B/C

5

Current-Limit Reaction Time

tLIM

578k , output high and

then short-circuit

μs

applied

MAX4995AF

1.5

Blanking Time

Retry Time

THERMAL PROTECTION

Thermal Shutdown

tBLANK (Note 5)

10

16.3 22.6

ms

tRETRY MAX4995A/MAX4995AF/MAX4995AL (Note 5) 320

723.2 ms

+150

°C

Thermal-Shutdown Hysteresis

15

°C

Note 3: ILIM is forward current limit.

ILIM

(mA)

=

29042(V)

RSETI(kΩ) + 2.48

(kΩ)

Note 4: Turn-on time and turn-off time are defined as the difference in the time between when the output crosses 10% and 90%

of the final output voltage.

Note 5: Blanking time and retry time are generated by the same oscillator. Therefore, the ratio of

t RETRY

t BLANK

is a constant value of 32. See Figures 2 and 3.

VOUT

10%

tSS

90%

90%

10%

tOFF

Figure 1. Timing Diagram for Measuring Turn-On Time (tSS) and Turn-Off Time (tOFF).

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