MAX5949 datasheet(3/18 Pages) MAXIM

3 / 18 page

-48V Hot-Swap Controllers

with External RSENSE

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ELECTRICAL CHARACTERISTICS (continued)

(VEE = 0V, VDD = 48V, TA = -40°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.) (Notes 2, 5)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

PWRGD OUTPUT SIGNAL REFERENCED TO DRAIN

DRAIN Input Bias Current

IDRAIN

VDRAIN = 48V

250

µA

DRAIN Threshold for Power-Good

VDL

VDRAIN - VEE threshold for power-good

condition, DRAIN decreasing

1.1

1.4

2.0

GATE High Threshold

VGH

∆VGATE - VGATE threshold for power-good

condition,

∆VGATE - VGATE decreasing

1.0

1.4

2.0

PWRGD, PWRGD Output

Leakage

IOH

PWRGD (MAX5949A) = 80V, VDRAIN = 48V,

PWRGD (MAX5949B) = 80V, VDRAIN = 0V

µA

PWRGD Output Low Voltage

VOL

V PWRGD - VEE; VDRAIN - VEE < VDL,

ISINK = 5mA (MAX5949A)

0.11

0.4

PWRGD Output Low Voltage

VOL

VPWRGD - VDRAIN; VDRAIN = 5V,

ISINK = 5mA (MAX5949B)

0.11

0.4

AC PARAMETERS

OV High to GATE Low

tPHLOV

Figures 2a, 3

0.5

µs

UV Low to GATE Low

tPHLUV

Figures 2a, 4

0.4

µs

OV Low to GATE High

tPLHOV

Figures 2a, 3

µs

UV High to GATE High

tPLHVL

Figures 2a, 4

5.5

µs

SENSE High to GATE Low

tPHLSENSE

Figures 2a, 5a

µs

Current Limit to GATE Low

tPHLCB

Figures 2b, 5b

350

500

650

µs

MAX5949A, Figures 2a, 6a

1.8

DRAIN Low to PWRGD Low

DRAIN Low to (PWRGD - DRAIN)

High

tPHLDL

MAX5949B, Figures 2a, 6a

3.4

µs

MAX5949A, Figures 2a, 6b

1.6

GATE High to PWRGD Low

GATE High to (PWRGD - DRAIN)

High

tPHLGH

MAX5949B, Figures 2a, 6b

2.5

µs

TURN-OFF

Latch-Off Period

tOFF

(Note 4)

Note 2:

All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to VEE,

unless otherwise specified.

Note 3:

Current into VDD with UV = 3V, OV = DRAIN = PWRGD = SENSE = VEE, GATE = floating.

Note 4:

Minimum duration of GATE pulldown following a circuit-breaker fault. The circuit breaker can be reset during this time by

toggling UV low, but the GATE pulldown does not release until tOFF has elapsed.

Note 5:

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

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