Datasheet

MAX5986A–MAX5986C/MAX5987A
IEEE 802.3af-Compliant, High-Efficiency, Class 1/
Class 2, PDs with Integrated DC-DC Converter
20Maxim Integrated
Typical Application Circuits (continued)
Figure 5. MAX5987A 5V Buck Regulator Output and 3.3V LDO Output
MAX5987A
LDO_FB
V
DD
V
CC
WAD
RREF
GND PGND
AUX
LX
FB
LED
L0
47µH
C2
10µF
C1
68nF
C3
1µF
1µF
R1
75k
I
0I
R
SIG
24.9kI
R2
24.9k
I
5V
OUTPUT
RJ-45 AND
BRIDGE
RECTIFIER
VDRV
TO 5V OUTPUT
LDO_IN
C6
1µF
LDO_OUT
C5
1µF
CLASS2
MPS
C4
47µF