MAX5946 datasheet(4/23 Pages) MAXIM

No de pièce	MAX5946

Description	Dual PCI Express, Hot-Plug Controller

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Fabricant	MAXIM [Maxim Integrated Products]

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Dual PCI Express, Hot-Plug

Controller

4

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V12VIN = V12S_- = V12S_+ = 12V, V3.3S_+ = V3.3S_- = V3.3VAUXIN = VON_ = VAUXON_ = VFON__ = 3.3V, PWRGD_ = FAULT_ = PORADJ

= TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES_DET_ = PGND = GND, TA = -40°C to +85°C, unless otherwise noted.

Typical values are at TA = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

PRES-DET_ High-to-Low

Deglitch Time

tDEG

357ms

PORADJ = open

90

160

250

RPORADJ = 20kΩ

35

55

75

RPORADJ = 100kΩ

145

265

380

PWRGD_ Power-On Reset

Time (Note 2)

tPOR_HL

RPORADJ = 200kΩ

570

ms

PWRGD_ Low-to-High

Deglitch Time

tPOR_LH

4µs

Sinking 2mA

0.1

PWRGD_, FAULT_ Output

Low Voltage

Sinking 30mA

0.7

V

PWRGD_, FAULT_ Output-

High Leakage Current

VPWRGD_ = VFAULT_ = 5.5V

1

µA

TIM = open

5.5

11

17.0

RTIM = 15kΩ

1.4

2.6

3.8

RTIM = 120kΩ

12

22

32

FAULT_ Timeout

tFAULT

RTIM = 300kΩ

59

ms

FAULT_ Timeout During

Startup

tSU

2 x tFAULT

ms

Autorestart Delay Time

tRESTART

64 x tFAULT

ms

Fault Reset Minimum Pulse

Width (Note 4)

tRESET

100

µs

Thermal-Shutdown Threshold

TSD

TJ rising

+150

°C

Thermal-Shutdown Threshold

Hysteresis

20

°C

OUTPUT_ Debounce Time

tDBC

2.6

4.4

6.2

ms

OUTPUT_ High Voltage

Sourcing 2mA

V3.3VAUXIN

- 0.3

V3.3VAUXIN

V

OUTPUT_ Low Voltage

Sinking 2mA

0.4

V

Note 1: 100% production tested at TA = +25°C. Parameters over temperature are guaranteed by design.

Note 2: PWRGD_ asserts a time tPOR_HL after VPGTH12, VPGTH3.3, and VPGTH3.3AUX conditions are met.

Note 3: The UVLO for the 3.3V supply is sensed at 3.3SA+.

Note 4: This is the time that ON_ or AUXON_ must stay low when resetting a fault condition.

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