Electrical characteristics (continued) – Rainbow Electronics MAX5945 User Manual
Page 3
MAX5945
Quad Network Power Controller
for Power-Over-LAN
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(AGND = +32V to +60V, V
EE
= 0V, V
DD
to DGND = +3.3V, all voltages are referenced to V
EE
, unless otherwise noted. Typical
values are at AGND = +48V, DGND = +48V, V
DD
= (DGND + 3.3V), T
A
= +25°C. Currents are positive when entering the pin and
negative otherwise.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Foldback Current-
Limit Threshold
V
TH_FB
V
OUT_
= V
AGND
64
mV
SENSE_ Input Bias Current
V
SENSE_
= V
EE
-2
µA
SUPPLY MONITORS
V
EE
Undervoltage Lockout
V
EEUVLO
V
AGND
- V
EE
, (V
AGND
- V
EE
) increasing
27
28.5
30
V
V
EE
Undervoltage-Lockout
Hysteresis
V
EEUVLOH
3
V
V
EE
Overvoltage
V
EE_OV
(V
AGND
- V
EE
)
> V
EE_OV
, V
AGND
increasing
61
62.5
64
V
V
EE
Overvoltage Hysteresis
V
OVH
1
V
V
EE
Undervoltage
V
EE_UV
(V
AGND
- V
EE
) < V
EE_UV
, V
AGND
decreasing
39
40
41
V
V
DD
Overvoltage
V
DD_OV
(V
DD
- V
DGND
)
> V
DD_OV
, V
DD
increasing
3.57
3.71
3.90
V
V
DD
Undervoltage
V
DD_UV
(V
DD
- V
DGND
) < V
DD_UV
, V
DD
decreasing
2.55
2.82
2.97
V
V
DD
Undervoltage Lockout
V
DDUVLO
Device operates when (V
DD
- V
DGND
) >
V
DDUVLO
, V
DD
increasing
1.7
V
V
DD
Undervoltage-Lockout
Hysteresis
V
DDHYS
120
mV
Thermal-Shutdown Threshold
T
SHD
Ports shut down and device resets if its junction
temperature exceeds this limit, temperature
increasing
+150
°C
Thermal-Shutdown Hysteresis
T
SHDH
20
°C
OUTPUT MONITOR
OUT_ Input Current
I
BOUT
V
OUT
= V
AGND
, all modes
2
µA
Idle Pullup Current at OUT_
I
DIS
OUT_ discharge current, detection and
classification off, port shutdown,
V
OUT_
= V
AGND
- 2.8V
200
260
µA
PGOOD High Threshold
PG
TH
V
OUT_
- V
EE
, OUT_ decreasing
1.8
2.0
2.2
V
PGOOD Hysteresis
PG
HYS
220
mV
PGOOD Low-to-High Glitch
Filter
t
PGOOD
Minimum time PGOOD has to be high to set bit in
register 10h
2
4
ms
LOAD DISCONNECT
DC Load Disconnect
Threshold
V
DCTH
Minimum V
SENSE
allowed before disconnect (DC
disconnect active), V
OUT_
= V
EE
3
4
5
mV