Datasheet

MAX5986A–MAX5986C/MAX5987A
IEEE 802.3af-Compliant, High-Efficiency, Class 1/
Class 2, PDs with Integrated DC-DC Converter
8Maxim Integrated
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
Figure 2. Effective Differential Resistance and Offset Current
Figure 1. MAX5986A/MAX5987A Internal TVS Test Setup
DETECTION CURRENT vs. INPUT VOLTAGE
MAX5986A toc01
INPUT VOLTAGE (V)
DETECTION CURRENT (mA)
8.97.45.94.42.9
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0
1.4 10.1
QUIESCENT CURRENT vs. SUPPLY
VOLTAGE (ULTRA-LOW POWER MODE)
MAX5986A toc02
SUPPLY VOLTAGE (V)
QUIESCENT CURRENT (mA)
55504540
2.75
3.00
3.25
3.50
3.75
4.00
2.50
35 60
SIGNATURE RESISTANCE
vs. SUPPLY VOLTAGE
MAX5986A toc03
SUPPLY VOLTAGE (V)
DIFFERENTIAL RESISTANCE (kI)
7.45.94.42.9
23
24
25
26
27
28
22
1.4 10.18.9
INPUT OFFSET CURRENT
vs. INPUT VOLTAGE
MAX5986A toc04
SUPPLY VOLTAGE (V)
OFFSET CURRENT (µA)
7.45.94.42.9
-2
-1
0
1
2
3
-3
1.4 10.18.9
I
IN
I
INi + 1
I
INi
I
OFFSET
dR
i
1VV
INi
V
INi + 1
I
OFFSET
= I
INi
-
V
INi
dR
i
dR
i
=
(V
INi + 1
- V
INi
)
=
1V
(I
INi + 1
- I
INi
) (I
INi + 1
- I
INi
)
V
IN
EVALUATION
BOARD
1ms/10ms/100ms
R
TEST
MAX5986A
100V