MAX5937LC datasheet(2/23 Pages) MAXIM

Part #	MAX5937LC

Description	-48V Hot-Swap Controllers with VIN Step Immunity and No RSENSE

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Manufacturer	MAXIM [Maxim Integrated Products]

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-48V Hot-Swap Controllers with VIN

Step Immunity and No RSENSE

2

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

VEE, VOUT, PGOOD (PGOOD), LP,

STEP_MON to GND............................................+0.3V to -85V

PGOOD (PGOOD) to VOUT ....................................-0.3V to +85V

PGOOD (PGOOD), LP, STEP_MON to VEE............-0.3V to +85V

GATE to VEE ...........................................................-0.3V to +20V

UVLO to VEE .............................................................-0.3V to +6V

Input Current

LP (internally, duty-cycle limited).........................................1A

PGOOD (PGOOD) (continuous) .....................................80mA

GATE (during 15V clamp, continuous) ...........................30mA

GATE (during 2V clamp, continuous) .............................50mA

GATE (during gate pulldown, continuous)......................50mA

Continuous Power Dissipation (TA = +70°C)

8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature .....................................................+150°C

Storage Temperature Range ............................-65°C to +150°C

Lead Temperature (soldering, 10s) ................................+300°C

ELECTRICAL CHARACTERISTICS

(VEE = -10V to -80V, VIN = GND - VEE, VSTEP_MON =VEE, RLP = 200

Ω, UVLO open, TA = -40°C to +85°C, unless otherwise noted.

Typical values are at VEE = -48V, TA = +25°C.) (Notes 1, 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Operating Voltage Range

VEE

Referenced to GND

-80

-10

V

Operating Supply Current

ICC

0.95

1.4

mA

VUVLO,R

lVEEl increasing

-33.5

-31.0

-29.5

Default VEE Undervoltage Lockout

VUVLO,F

lVEEl decreasing

-28

V

UVLO Reference Threshold,

VEE Rising

VUVLO_REF,R

VUVLO increasing

1.219

1.25

1.281

V

UVLO Reference Threshold,

VEE Falling

VUVLO_REF,F

VUVLO decreasing

1.069

1.125

1.181

V

UVLO Input Resistance

20

50

k

Ω

UVLO Transient Rejection

tOVREJ

0.8

1.5

2.25

ms

Power-Up Delay (Note 3)

tONDLY

80

220

380

ms

VEE and UVLO Glitch Rejection

(Note 4)

tREJ

0.8

1.5

2.25

ms

VOUT to VEE Leakage Current

VEE = -80V, VOUT = GND

0.01

1µA

LP to VEE Leakage Current

VEE = -80V, VLP = GND

0.01

1µA

VIN = 10V

6.5

6.8

7.2

External Gate-Drive Voltage

VGS

VGATE - VEE

14 ≤ VIN ≤ 80V

8.1

10

12.8

V

ICLAMP = 9mA

13.5

16

MOSFET fully

enhanced

ICLAMP = 20mA

17

19.5

ICLAMP = 1mA

2.1

2.55

GATE to VEE Clamp Voltage

Power-off,

VEE = GND

ICLAMP = 10mA

2.5

2.9

V

Open-Loop Gate-Charge Current

VGATE = VEE, VOUT = GND

-66

-52

-35

µA

VIN > 10V

9

14.1

GATE Pulldown Switch

On-Resistance

RGATE

VGATE - VEE =

500mV

VIN > 14V

7.5

12.5

Ω

Output-Voltage Slew Rate

SR

l dVOUT/dt l

2.4

9

14.8

V/ms

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