Rainbow-electronics MAX5958 Bedienungsanleitung PDF herunterladen (Seite 3)

MAX5957/MAX5958

Triple PCI Express, Hot-Plug Controllers

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PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

3.3V CONTROL

3.3V Current-Limit Threshold

3.3S_+

- V

3.3S_-

)

3.3ILIM

17 20 23 mV

3.3G_ Gate Charge Current I

3.3G_,CHG

3.3G_

= GND 4 5 6 µA

Normal turn-off, ON_ = GND,

3.3G

_ = 2V

50 150 250 µA

3.3G_ Gate Discharge Current I

3.3G_, DIS

Output short-circuit condition, strong

gate pulldown to regulation,

3.3S

_+ - V

3.3S_-

≥ 1V, V

3.3G-

= 5V

90 150 250 mA

3.3G_ Gate High Voltage

3.3G_

- V

3.3S_+

)

3.3G_H

SOURCE

= 1µA 4.5 5.5 6.8 V

3.3G_ Threshold Voltage for

PWRGD_ Assertion

PGTH3.3

Referred to V

3.3AUXIN

, I

3.3G_

= 1µA

(Note 2)

3.0 4.0 4.5 V

3.3S_- Input Bias Current 1µA

3.3S_+ Input Bias Current 20 60 µA

3.3V AUXILIARY SUPPLY

3.3VAUXIN Supply Input Voltage

Range

3.3AUXIN

3.0 3.3 3.6 V

3.3VAUXIN

rising 2.50 2.65 2.78 V

3.3VAUXIN Undervoltage

Lockout

3.3VAUXUVLO

Hysteresis 30 mV

3.3VAUXIN Supply Current V

3.3VAUXIN

= 3.6V 2.5 5 mA

3.3VAUXO

= 375mA (MAX5957) 225

3.3VAUXIN to 3.3VAUXO

Maximum Dropout

3.3VAUXO

= 550mA (MAX5958) 280

MAX5957 376 450 564

3.3VAUXO_ Current-Limit

Threshold

3.3VAUXO_ shorted

to GND

MAX5958 560 700 850

3.3VAUXO_ Threshold for

PWRGD_ Assertion (V3.3VAUXIN

- V3.3VAUXO)

PGTH3.3AUX

(Note 2) 400 mV

LOGIC SIGNALS

Rising edge 1.0 2.0 V

Input-Logic Threshold (ON_,

FON_, AUXON_, PRES-DET_,

INPUT_)

Hysteresis 25 mV

Input Bias Current (ON_,

AUXON_, INPUT_)

1µA

FON_, PRES-DET_ Internal Pullup 25 50 75 kΩ

ON_, AUXON_ High-to-Low

Deglitch Time

4µs

ELECTRICAL CHARACTERISTICS (continued)

12VIN

= V

12S_+

= V

12S_-

= 12V, V

3.3S_+

3.3S_-

= V

3.3AUXIN

= V

ON_

= V

AUXON_

= V

FON_

= 3.3V, PWRGD_ = FAULT_ = PORADJ =

TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES-DET_ = PGND = GND, T

= T

= -40°C to +85°C, unless otherwise

noted. Typical values are at T

= T

= +25°C.) (Note 1)

1 2 3 4 5 6 7 8 ... 24 25

MAX5957/MAX5958 1

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