MAX4272(2001) Просмотр технического описания (PDF) - Maxim Integrated

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MAX4272
(Rev.:2001)

3V to 12V Current-Limiting Hot Swap Controllers with Autoretry, DualSpeed/BiLevel Fault Protection

Maxim Integrated 

3V to 12V Current-Limiting Hot Swap Controllers

with Autoretry, DualSpeed/BiLevel Fault Protection

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)

PARAMETER

Slow Turn-Off Time

SYMBOL

tSLOW,OFF

CONDITIONS

Time from trigger to VGATE < 0.1V

(triggered by either the ON input or the

slow comparator), CGATE = 1000pF to

GND

MIN TYP MAX UNITS

60

µs

Time from current overload to VGATE < 0.1V

Fast Turn-Off Time

tFAST,OFF (triggered by the fast comparator, during

15

µs

normal operation), CGATE = 1000pF to GND

Maximum Gate Protection

Voltage

Minimum Gate Drive Voltage

Voltage at which internal zener clamp

circuitry is triggered, measured with

respect to VIN (MAX4271/MAX4272),

measured with respect to VLLMON

(MAX4273)

Measured with

respect to VIN,

IGATE = 8.5µA

VIN ≥ 5V

VIN ≥ 2.7V

During fast discharge, due to a fast

comparator fault in normal operation

6.7

7.5

V

5

V

2.7

0.4

1

2.75 mA

Gate Discharge Current

During startup (current regulation provided

IGATE,DIS by fast comparator)

25

70

195

During normal discharge, due to a slow

µA

comparator fault in normal mode, or by ON

75

200

550

going low

LLMON Overvoltage Threshold

Startup is initiated only after VLLMON is less

0.1

V

than this voltage (MAX4273)

GATE Overvoltage Threshold

Startup is initiated only after VGATE is less

than this voltage

LLMON Impedance

Impedance to GND, after a fault (MAX4273)

REFERENCE (MAX4273)

Output Voltage

Line Regulation

VREF No load, VIN = 5V

∆VREF, LINE 2.7V ≤ VIN ≤ 13.2V, no load

Load Regulation

∆VREF,

LOAD

ON AND RESET COMPARATORS

Threshold Voltage

Hysteresis

VHYST

Power-Supply Rejection Ratio

PSRR

IREF = 0 to 100µA, VIN = 5V

VIN = 5V, rising threshold at ON or INC

2.7V ≤ VIN ≤ 13.2V

Propagation Delay

tD,COMP

10mV overdrive, ON going positive or

negative, INC going negative

INC going positive

0.1

0.6

V

1

kΩ

1.164 1.2 1.236

V

1

8

mV

0.6

3

mV

0.575 0.6 0.625

V

3

mV

±1 mV/V

10

µs

100

150

200

ms

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