MAX5986A MAXIM [Maxim Integrated Products], MAX5986A Datasheet - Page 5

• Manufacturer Part Number: MAX5986A
• Description: IEEE 802.3af-Compliant, High-Efficiency, Class 1,Powered Devices with Integrated DC-DC Converter
• Manufacturer: MAXIM [Maxim Integrated Products]

ELECTRICAL CHARACTERISTICS (continued)
(V
C1 = 68nF, C2 = 10µF, C3 = 1µF (see Figure 3), V
otherwise noted. T
Powered Devices with Integrated DC-DC Converter
FEEDBACK (FB)
FB Regulation Voltage
FB Input Bias Current
OUTPUT VOLTAGE
Output Voltage Range
Cycle by Cycle Overvoltage
Protection
INTERNAL COMPENSATION NETWORK
Compensation Network Zero-
Resistance
Compensation Network Zero-
Capacitance
CURRENT LIMIT
Peak Current-Limit Threshold
Runaway Current-Limit
Threshold
Valley Current-Limit Threshold
ZX Threshold
TIMINGS
Switching Frequency
Frequency Foldback
Consecutive ZX Events for
Entering Foldback
Consecutive ZX Events for
Exiting Foldback
V
Cause HICCUP
HICCUP Timeout
Minimum On-Time
LX Dead Time
RESET (MAX5987A)
V
Assertion
V
Deassertion
DD
OUT
FB
FB
IEEE 802.3af-Compliant, High-Efficiency, Class 1,
= 48V, R
Threshold for RESET
Threshold for RESET
Undervoltage Trip Level to
PARAMETER
SIG
= 24.9kω, LED, V
A
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= T
J
= -40°C to +85°C, unless otherwise noted. Typical values are at T
CC
I
I
, SL, ULP, WK, RESET, LDO_OUT unconnected, WAD = LDO_EN = LDO_IN = PGND = GND,
V
PEAK-LIMIT
RUNAWAY-
SYMBOL
f
V
I
V
V
SW-FOLD
OUT-HICF
t
V
C
VALLEY-
R
ON-MIN
OUT-OV
FB-OKR
V
FB-OKF
LIMIT
LIMIT
FB-RG
ZERO
ZERO
f
I
I
OUT
SW
FB
ZX
FB
V
Rising (Note 7)
Falling (Note 7)
After soft-start completed (Note 7)
V
V
FB
FB
FB
= V
= 1.224V
falling (Note 7)
rising (Note 7)
AUX
= 0V, LX unconnected. All voltages are referenced to GND, unless
CONDITIONS
MAX5986A/MAX5987A
A
= +25°C.) (Note 3)
1.203
101.5
122.5
98.2
1.45
MIN
245
3.0
55
1.225
137.5
101.1
TYP
105
200
150
275
120
1.9
1.5
10
25
60
97
14
90
95
8
8
1.252
107.8
152.5
MAX
200
104
305
126
5.6
65
UNITS
Events
Events
kHz
kHz
mA
ms
nA
kI
pF
ns
ns
%
%
%
%
A
A
A
V
V