Datasheet
MAX5920
-48V Hot-Swap Controller
with External R
SENSE
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
EE
= 0V, V
DD
= 48V, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise noted.) (Notes 1, 4)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
D RAIN Thr eshol d for P ow er - G ood V
DL
V
DRAIN
- V
EE
threshold for power-good
condition, DRAIN decreasing
1.1 1.7 2.0 V
GATE High Threshold V
GH
∆V
GATE
- V
GATE
threshold for power-good
condition, ∆V
GATE
- V
GATE
decreasing
1.0 1.6 2.0 V
PWRGD, PWRGD Output
Leakage
I
OH
PWRGD (MAX5920A) = 80V, V
DRAIN
= 48V,
PWRGD (MAX5920B) = 80V, V
DRAIN
= 0V
10 µA
PWRGD Output Low Voltage V
OL
V
PWRGD
- V
EE;
V
DRAIN
- V
EE
< V
DL
,
I
SINK
= 5mA (MAX5920A)
0.11 0.4 V
PWRGD Output Low Voltage V
OL
V
PWRGD
- V
DRAIN
; V
DRAIN
= 5V,
I
SINK
= 5mA (MAX5920B)
0.11 0.4 V
OVERTEMPERATURE PROTECTION
Overtemperature Threshold T
OT
Junction temperature, temperature rising 135 °C
Overtemperature Hysteresis T
HYS
20 °C
AC PARAMETERS
OV High to GATE Low t
PHLOV
Figures 1a, 2 0.5 µs
UV Low to GATE Low t
PHLUV
Figures 1a, 3 0.4 µs
OV Low to GATE High t
PLHOV
Figures 1a, 2 3.3 µs
UV High to GATE High t
PLHVL
Figures 1a, 3 3.4 µs
SENSE High to GATE Low t
PHLSENSE
Figures 1a, 4a 1 3 µs
Current Limit to GATE Low t
PHLCL
Figures 1b, 4b 350 500 650 µs
MAX5920A, Figures 1a, 5a 1.8DRAIN Low to PWRGD Low
DRAIN Low to (PWRGD - DRAIN)
High
t
PHLDL
MAX5920B, Figures 1a, 5a 3.4
µs
MAX5920A, Figures 1a, 5b 1.6GATE High to PWRGD Low
GATE High to (PWRGD-DRAIN)
High
t
PHLGH
MAX5920B, Figures 1a, 5b 2.5
µs
TURN-OFF
Latch-Off Period t
OFF
(Note 3)
128 x
t
PHLCL
ms
Note 1: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to V
EE
,
unless otherwise specified.
Note 2: Current into V
DD
with UV = 3V, OV, DRAIN, PWRGD, SENSE = V
EE
, GATE = floating.
Note 3: 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 t
OFF
has elapsed.
Note 4: Limits are 100% tested at T
A
= +25°C and +85°C. Limits at -40°C are guaranteed by design.