MAX5953A MAXIM [Maxim Integrated Products], MAX5953A Datasheet - Page 23

• Manufacturer Part Number: MAX5953A
• Description: IEEE 802.3af PD Interface and PWM Controllers with Integrated Power MOSFETs
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 9. DC-DC Converter Block Diagram (Voltage-Mode PWM Controller and Two-Switch Power Stage)
IEEE 802.3af PD Interface and PWM Controllers
REGOUT
RCFF
FLTINT
RAMP
OPTO
CSS
GND
33µA
80µA
2.7V/1.9V
MAX5953A
MAX5953B
MAX5953C
MAX5953D
5V
5V
IFLT
50Ω
REGOK
______________________________________________________________________________________
CPWM
OVRLD
GND
Q
REG
5V
D
R
T
7.5V
OVT
OVT
DCUVLO
REFOK
REGOK
OVRLD
with Integrated Power MOSFETs
CLK
GND
REFOK
50Ω
Q
T-FF
R
T
(1.25V)
R
S
REF
Q
ILIM
SHDN
OSC
DCUVLO
150mV
SHUTDOWN
THERMAL
DCUVLO
DELAY
80ns
10MHz
Block Diagrams (continued)
OVT
PGND
1.25V
LEADING-
DELAY
LEVEL
SHIFT
EDGE
SHOT
ONE
30Ω
0.4Ω
QB
0.4Ω
QH
QL
DCUVLO
XFRMRH
XFRMRL
INBIAS
PPWM
DRVIN
DRNH
PGND
RTCT
HVIN
SRC
BST
CS
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