MAX5918 datasheet(3/15 Pages) MAXIM

No de pièce	MAX5918

Description	Low-Voltage, Dual Hot-Swap Controllers with Independent ON/OFF Control

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Fabricant	MAXIM [Maxim Integrated Products]

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Low-Voltage, Dual Hot-Swap Controllers with

Independent ON/OFF Control

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VIN_ = +1V to +13.2V provided at least one supply is higher than +2.7V, VON1 = VON2 = +2.7V, TA = -40°C to +85°C, unless other-

wise noted. Typical values are at VIN1 = +5V, VIN2 = +3.3V, and TA = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VON_ < 4.5V

0.03

VON_ > 4.5V

100

ON Input Bias Current

IBON

VIN1 = VIN2 = +13.2V

VON_ = 4.5V

0.03

1

µA

ON Pulse Width Low

tUNLATCH

To unlatch after a latched fault

100

µs

DIGITAL OUTPUT (PGOOD_)

Output Leakage Current

VPGOOD_ = 13.2V

1

µA

Output Voltage Low

VOL

ISINK = 1mA

0.4

V

PGOOD_ Delay

tPGDLY

After tSTART, MON_ = VIN_

0.75

ms

OUTPUT VOLTAGE MONITORS (MON1, MON2)

Overvoltage

657

687

707

MON_ Trip Threshold

VMON

Undervoltage

513

543

563

mV

MON_ Glitch Filter

20

µs

MON_ Input Bias Current

VMON_ = 600mV

0.03

µA

UNDERVOLTAGE LOCKOUT (UVLO)

Startup is initiated when this threshold is

reached by VIN1 or VIN2, VON_ > 0.875V

2.10

2.4

2.67

V

UVLO Threshold

VUVLO

Hysteresis

100

mV

UVLO Glitch Filter Reset Time

VIN_ toggled below UVLO to unlatch after a

fault

100

µs

UVLO to Startup Delay

tD,UVLO

VIN_ step from 0 to 2.8V

20

37.5

60

ms

SHUTDOWN LATCH/RESTART

Autoretry Delay

tRETRY

Delay time to restart after fault shutdown

64 x tSTART

ms

Note 1: All devices are 100% tested at TA = +25°C and TA = +85°C. Limits at TA = -40°C are guaranteed by design.

Note 2: The MAX5918/MAX5919 slow-comparator threshold is adjustable. VSC,TH = RLIM ✕ 0.25µA + 25mV (see the Typical

Operating Characteristics).

Note 3: The current-limit slow-comparator response time is weighted against the amount of overcurrent, the higher the overcurrent

condition, the faster the response time (see the Typical Operating Characteristics).

Note 4: The startup period (tSTART) is the time during which the slow comparator is ignored and the device acts as a current-limiter

by regulating the sense current with the fast comparator (see the Startup Period section).

Note 5: The current available at GATE is a function of VGATE (see the Typical Operating Characteristics).

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