User Manual

MAX5953A/MAX5953B/MAX5953C/MAX5953D
IEEE 802.3af PD Interface and PWM Controllers
with Integrated Power MOSFETs
22 ______________________________________________________________________________________
Block Diagrams
V+
UVLO
V+
UVLO*
*MAX5953A/MAX5953C ONLY.
**MAX5953C/MAX5953D ONLY.
***MAX5953A/MAX5953B ONLY.
GATE
MAX5953A
MAX5953B
MAX5953C
MAX5953D
CLASSIFICATION
RCLASS
PGOOD**
6.8V
EN
REF
2.4V
REF
2.4V, 0.8
HYST
21.8V
39V
200mV
V
EE
V
GATE
, 6V
1.2V, REF
5V, REF
Q4
PGOOD***
OUT
Q3
Q1
0.6Ω
Q2
38Ω
EN
Figure 8. Powered Device Interface Block Diagram