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MAX5953A Datasheet(PDF) 3 Page - Maxim Integrated Products

Part No. MAX5953A
Description  IEEE 802.3af PD Interface and PWM Controllers with Integrated Power MOSFETs
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX5953A Datasheet(HTML) 3 Page - Maxim Integrated Products

 
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IEEE 802.3af PD Interface and PWM Controllers
with Integrated Power MOSFETs
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(VIN = (V+ - VEE) = 48V, GATE = PGOOD = PGOOD = unconnected, GND = OUT, HVIN = V+, UVLO = VEE, TJ = 0°C to +125°C, unless
otherwise noted. Typical values are at TJ = +25°C. All voltages are referenced to VEE, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5953A/MAX5953C
7.1
Default Power Turn-On/Off
Hysteresis Voltage
VHYST,UVLO
MAX5953B/MAX5953D
4
V
External UVLO Programming
Range
VIN,EX
MAX5953A/MAX5953C only (Note 7)
12
67
V
UVLO External Reference
Voltage
VREF,UVLO
VUVLO increasing
2.400
2.460
2.522
V
UVLO External Reference
Voltage Hysteresis
VHYST,UVLO
Ratio to VREF, UVLO
19.2
20
20.9
%
UVLO Bias Current
IIN,UVLO
VUVLO = 2.460V
-1.5
+1.5
µA
UVLO Input Ground-Sense
Threshold
VTH,G,UVLO
(Note 8)
50
440
mV
UVLO Input Ground-Sense Glitch
Rejection
7µs
Power Turn-Off Voltage,
Undervoltage Lockout Deglitch
Time
tOFF_DLY
VIN, VUVLO falling (Note 9)
0.32
ms
Isolation Switch n-Channel
MOSFET On-Resistance
RON,ISO
Output current = 300mA, VGATE = 5.6V,
measured between OUT and VEE
0.6
1.5
Isolation Switch n-Channel
MOSFET Off-Threshold Voltage
VGSTH
VGATE - VEE, OUT = V+,
output current < 1µA
0.5
V
GATE Pulldown Switch
Resistance
RG
Power-off mode, VIN = +12V
38
80
GATE Charging Current
IGATE
VGATE = 2V
4.5
10
16.5
µA
GATE High Voltage
VGATE
IGATE = 1µA
5.59
5.76
5.93
V
VOUT - VEE decreasing, VGATE = 5.75V
1.16
1.23
1.31
V
PGOOD Assertion VOUT
Threshold (Note 10)
VOUTEN
Hysteresis
70
mV
VGATE - VEE increasing
4.62
4.76
4.91
V
PGOOD,
PGOOD Assertion
VGATE Threshold
VGSEN
Hysteresis
80
mV
PGOOD,
PGOOD Output Low
Voltage
VOL,PGOOD
ISINK = 2mA, VOUT
≤ (V+ - 5V) (Note 11)
0.2
V
PGOOD Leakage Current
GATE = high, V+ - VOUT = 67V (Note 11)
1µA
PGOOD Leakage Current
GATE = VEE, PGOOD - VEE = 67V
(Note 11)
1µA


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