IEEE 802.3af/at-Compliant, Powered Device Interface
Controller with Integrated Power MOSFET
_______________________________________________________________________________________ 7
  Pin Description
  Pin Configuration
PIN
NAME
FUNCTION
1, 1316
N.C.
No Connection. Not internally connected. Leave N.C. unconnected.
2
V
DD
 
Positive Supply Input. Connect a 68nF (min) bypass capacitor between V
DD
 and V
SS
.
3
DET
Detection Resistor Input. Connect a signature resistor (R
DET
 = 24.9kI) from DET to V
DD
.
4
I.C.
Internally Connected. Leave unconnected, leave I.C. unconnected.
5, 6
V
SS
Negative Supply Input. V
SS
 connects to the source of the integrated isolation n-channel power
MOSFET.
7, 8
RTN
Drain of Isolation MOSFET. RTN connects to the drain of the integrated isolation n-channel power
MOSFET. Connect RTN to the downstream DC-DC converter ground as shown in the Typical
Application Circuit.
TQFN
TOP VIEW
+
3
4
2
1
10
9
11
EP*
5
6
V
DD
8
16
15
13
DET
I.C.
CLS
2EC
PG
WAD
MAX5969D
7
14
N.C.
12
CONNECT TO V
SS
.
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