MAX5986A MAXIM [Maxim Integrated Products], MAX5986A Datasheet - Page 6

• 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
Note 3: All devices are 100% production tested at T
Note 4: The input offset current is illustrated in Figure 2.
Note 5: Effective differential input resistance is defined as the differential resistance between V
Note 6: A 20V glitch on input voltage, which takes V
Note 7 Referred to feedback regulation voltage.
Note 8: Referred to LDO feedback regulation voltage.
Note 9: The WAD Detection Rising and Falling Thresholds control the isolation power MOS transistor. To turn the DC-DC on in
Figure 1. MAX5986A/MAX5987A Internal TVS Test Setup
Powered Devices with Integrated DC-DC Converter
V
Assertion
RESET Deassertion Delay After
FB Reaches 95% Regulation
RESET Output Voltage Low
RESET Leakage Current
DD
LDO_FB
100V
IEEE 802.3af-Compliant, High-Efficiency, Class 1,
= 48V, R
exit power-on mode.
WAD mode, the WAD must be detected and the V
PARAMETER
Threshold for RESET
SIG
1ms/10ms/100ms
= 24.9kω, LED, V
A
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= T
R
J
TEST
= -40°C to +85°C, unless otherwise noted. Typical values are at T
CC
V
, SL, ULP, WK, RESET, LDO_OUT unconnected, WAD = LDO_EN = LDO_IN = PGND = GND,
LDO_FB-OKF
SYMBOL
EVALUATION
MAX5986A
BOARD
FB
A
DD
V
(Note 8)
I
SINK
LDO_FB
= +25°C. Limits over temperature are guaranteed by design.
= V
below V
= 1mA
AUX
DD
falling, LDO_FB = V
must be within the V
= 0V, LX unconnected. All voltages are referenced to GND, unless
ON
CONDITIONS
shorter than or equal to t
Figure 2. Effective Differential Resistance and Offset Current
I
OFFSET
MAX5986A/MAX5987A
I
INi + 1
I
INi
I
IN
DRV
DD
I
OFFSET
voltage range.
dR
i
=
= I
(V
(I
A
INi
INi + 1
INi + 1
OFF_DLY
-
= +25°C.) (Note 3)
V
dR
INi
DD
i
- V
- I
MIN
INi
INi
V
)
and GND, see Figure 2.
INi
)
=
(I
does not cause the device to
INi + 1
1V
1V
TYP
3.72
±10
- I
0.1
90
dR
INi
V
i
INi + 1
)
MAX
UNITS
V
ms
FA
IN
%
V