Electrical characteristics (continued) – Rainbow Electronics MAX5953D User Manual
Page 3
MAX5953A/MAX5953B/MAX5953C/MAX5953D
IEEE 802.3af PD Interface and PWM Controllers
with Integrated Power MOSFETs
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= (V+ - V
EE
) = 48V, GATE = PGOOD = PGOOD = unconnected, GND = OUT, HVIN = V+, UVLO = V
EE
, T
J
= 0°C to +125°C, unless
otherwise noted. Typical values are at T
J
= +25°C. All voltages are referenced to V
EE
, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5953A/MAX5953C
7.1
Default Power Turn-On/Off
Hysteresis Voltage
V
HYST,UVLO
MAX5953B/MAX5953D
4
V
External UVLO Programming
Range
V
IN,EX
MAX5953A/MAX5953C only (Note 7)
12
67
V
UVLO External Reference
Voltage
V
REF,UVLO
V
UVLO
increasing
2.400
2.460
2.522
V
UVLO External Reference
Voltage Hysteresis
V
HYST,UVLO
Ratio to V
REF, UVLO
19.2
20
20.9
%
UVLO Bias Current
I
IN,UVLO
V
UVLO
= 2.460V
-1.5
+1.5
µA
UVLO Input Ground-Sense
Threshold
V
TH,G,UVLO
(Note 8)
50
440
mV
UVLO Input Ground-Sense Glitch
Rejection
7
µs
Power Turn-Off Voltage,
Undervoltage Lockout Deglitch
Time
t
OFF_DLY
V
IN
, V
UVLO
falling (Note 9)
0.32
ms
Isolation Switch n-Channel
MOSFET On-Resistance
R
ON,ISO
Output current = 300mA, V
GATE
= 5.6V,
measured between OUT and V
EE
0.6
1.5
Ω
Isolation Switch n-Channel
MOSFET Off-Threshold Voltage
V
GSTH
V
GATE
- V
EE
, OUT = V+,
output current < 1µA
0.5
V
GATE Pulldown Switch
Resistance
R
G
Power-off mode, V
IN
= +12V
38
80
Ω
GATE Charging Current
I
GATE
V
GATE
= 2V
4.5
10
16.5
µA
GATE High Voltage
V
GATE
I
GATE
= 1µA
5.59
5.76
5.93
V
V
OUT
- V
EE
decreasing, V
GATE
= 5.75V
1.16
1.23
1.31
V
PGOOD Assertion V
OUT
Threshold (Note 10)
V
OUTEN
Hysteresis
70
mV
V
GATE
- V
EE
increasing
4.62
4.76
4.91
V
PGOOD, PGOOD Assertion
V
GATE
Threshold
V
GSEN
Hysteresis
80
mV
PGOOD, PGOOD Output Low
Voltage
V
OL,PGOOD
I
SINK
= 2mA, V
OUT
≤ (V+ - 5V) (Note 11)
0.2
V
PGOOD Leakage Current
GATE = high, V+ - V
OUT
= 67V (Note 11)
1
µA
PGOOD Leakage Current
GATE = V
EE
, PGOOD - V
EE
= 67V
(Note 11)
1
µA