MAX5953A Datasheet, PDF (3/27 Pages) Maxim Integrated Products – IEEE 802.3af PD Interface and PWM Controllers with Integrated Power MOSFETs

IEEE 802.3af PD Interface and PWM Controllers
with Integrated Power MOSFETs
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
Default Power Turn-On/Off
Hysteresis Voltage
MAX5953A/MAX5953C
V_{HYST,UVLO MAX5953B/MAX5953D}
7.1
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
UVLO Bias Current
UVLO Input Ground-Sense
Threshold
V_HYST,UVLO Ratio to V_{REF, UVLO}
I_IN,UVLO V_UVLO = 2.460V
V_TH,G,UVLO (Note 8)
19.2
20
20.9
%
-1.5
+1.5
µA
50
440
mV
UVLO Input Ground-Sense Glitch
Rejection
7
µs
Power Turn-Off Voltage,
Undervoltage Lockout Deglitch
t_{OFF_DLY} V_IN, V_UVLO falling (Note 9)
0.32
ms
Time
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
GATE Charging Current
GATE High Voltage
PGOOD Assertion V_OUT
Threshold (Note 10)
PGOOD, PGOOD Assertion
V_GATE Threshold
PGOOD, PGOOD Output Low
Voltage
PGOOD Leakage Current
PGOOD Leakage Current
R_G
Power-off mode, V_IN = +12V
38
80
Ω
I_GATE
V_GATE
V_OUTEN
V_GSEN
V_GATE = 2V
I_GATE = 1µA
V_OUT - V_EE decreasing, V_GATE = 5.75V
Hysteresis
V_GATE - V_EE increasing
Hysteresis
4.5
10
16.5
µA
5.59 5.76 5.93
V
1.16 1.23 1.31
V
70
mV
4.62 4.76 4.91
V
80
mV
V_OL,PGOOD I_SINK = 2mA, V_OUT ≤ (V+ - 5V) (Note 11)
0.2
V
GATE = high, V+ - V_OUT = 67V (Note 11)
GATE = V_EE, PGOOD - V_EE = 67V
(Note 11)
1
µA
1
µA
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