MAX4272ESA datasheet(4/24 Pages) MAXIM

4 / 24 page

3V to 12V Current-Limiting Hot Swap Controllers

with Autoretry, DualSpeed/BiLevel Fault Protection

_______________________________________________________________________________________

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

Input can be driven to the absolute

maximum limit without false output

inversion

-0.1

13.2

Input Bias Current

IB,COMP

0.001

µA

ON Pulse Width Low (Note 7)

tRESTART

To unlatch a fault MAX4271, MAX4273 with

CTIM = IN

µs

DIGITAL OUTPUTS (STAT, OUTC)

Output Leakage Current

VSTAT

≤ 13.2, VOUTC ≤ 13.2

µA

Output Voltage Low

VOL

ISINK = 1mA

0.4

RETRY TIMING (MAX4272, MAX4273)

Retry Timeout Period

tRETRY

100nF capacitor on CTIM (Note 5)

0.5

Default Retry

Timeout Period

tRETRY

(default)

CTIM = no connection

176

µs

UNDERVOLTAGE LOCKOUT (UVLO)

Threshold

VUVLO

Startup is initiated when this threshold is

exceeded at IN

2.25

2.67

Hysteresis

VUVLO,HYST

100

Delay

tD,UVLO

Time the input voltage must exceed

undervoltage lockout before startup is

initiated

100

150

200

ELECTRICAL CHARACTERISTICS (continued)

(VIN = +2.7V to +13.2V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VIN = +5V and TA = +25°C.) (Note 3)

Note 3: All devices are 100% tested at TA = +25°C. All temperature limits are guaranteed by design.

Note 4: Startup period is the time during which the slow comparator is ignored and the fast comparator regulates the sense current.

It is measured from the time ON is brought high.

Note 5: Inferred from test with CTIM = 1nF.

Note 6: The current available at GATE is a function of VGATE (see Typical Operating Characteristics).

Note 7: Guaranteed by design.

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