MAX5981AETE+ Maxim Integrated Products, MAX5981AETE+ Datasheet - Page 7

• Manufacturer Part Number: MAX5981AETE+
• Description: Power Switch ICs - POE / LAN IEEE 802.3af/at PDIC Controller
• Manufacturer: Maxim Integrated Products

Specifications of MAX5981AETE+

• Lead Free Status / Rohs Status: Details

IEEE 802.3af/at-Compliant, Powered Device Interface
PIN
5, 6
7, 8
10
1
2
3
4
9
NAME
WAD
N.C.
RTN
V
DET
V
I.C.
PG
DD
SS
_______________________________________________________________________________________
No Connection. Not internally connected.
Positive Supply Input. Connect a 68nF (min) bypass capacitor between V
Detection Resistor Input. Connect a signature resistor (R
Internally Connected. Leave unconnected.
Negative Supply Input. V
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.
Wall Power Adapter Detector Input. Wall adapter detection is enabled the moment V
the mark event threshold. Detection occurs when the voltage from WAD to RTN is greater than 9V. When
a wall power adapter is present, the isolation n-channel power MOSFET turns off, 2EC current sink turns
on. Connect WAD directly to RTN when the wall power adapter or other auxiliary power source is not
used.
Open-Drain Power-Good Indicator Output. PG sinks 230FA to disable the downstream DC-DC converter
while turning on the hot-swap MOSFET switch. PG current sink is disabled during detection, classifica-
tion, and in the steady-state power mode. The PG current sink is turned on to disable the downstream
DC-DC converter when the device is in sleep mode.
Controllers with
TOP VIEW
N.C.
V
DET
I.C.
DD
1
2
3
4
SS
connects to the source of the integrated isolation n-channel power MOSFET.
+
16
EP*
5
MAX5981A
MAX5981B
15
6
TQFN
Integrated Power MOSFET
14
7
FUNCTION
13
8
DET
12
11
10
9
CLS
2EC
PG
WAD
CONNECT TO V
= 24.9kI) from DET to V
SS
.
DD
Pin Configuration
and V
Pin Description
SS
DD
.
DD
- V
.
SS
crosses
7