MAX5913A, MAX5914A +48V Quad Hot-Swap Controllers For Power-Over-LAN0 pages

General Description
The MAX5913A/MAX5914A are quadruple hot-swap controllers.
The MAX5913A/MAX5914A independently control
four external n-channel switches to hot-swap system
loads from a single VCC supply line. The devices allow
the safe insertion and removal of power devices from live
network ports. The operating supply voltage range is
between +35V and +72V. The devices are intended for
applications in Power-Over-Media-Dependent Interface
(MDI), but are not limited to such usage.
The MAX5913A/MAX5914A feature an internal undervoltage
lockout (UVLO) function that prevents the FET
from turning on, if VCC does not exceed the default
value of +32V. The devices also feature a +12V relay
driver with 100mA current drive capable of driving lowvoltage
+3.3V relays. The MAX5913A features an
active-low relay driver that sinks current when the relay
output is enabled. The MAX5914A features an activehigh
relay driver output that sources 1mA to drive an
external FET relay driver when the relay output is
enabled. Control circuitry ensures the relays and the
FETs are off until VCC reaches the UVLO threshold. The
MAX5913A/MAX5914A use an external sense resistor
to enable all the internal current-sense functions.
The MAX5913A/MAX5914A feature a programmable
analog current-limit circuit. If the switch remains in current
limit for more than a programmable time, the n-channel
FET latches off and the supply can be restarted either by
autoretry or by an external command after the preset offtime
has elapsed.
The MAX5913A/MAX5914A are available in a 44-pin
MQFP package and are specified for the extended
-40°C to +85°C operating temperature range.
Applications
Power-Over-LAN
Power-Over-MDI
IP Phone Switches/Routers
Telecom Line Cards
Network Switches/Routers
Midspan Power-Over-MDI
Features
Wide Operating Input Voltage Range:
+35V to +72V
IEEE® 802.3af Compatible
Four Independent Power Switch Controllers
Open-Circuit Detector
On-Board Charge Pumps to Drive External
n-Channel FETs
Current Sense with External Resistor
Foldback Current Limiting
+32V Input Undervoltage Lockout
On-Chip +12V, 100mA Voltage Relay Drivers
MAX5913A/MAX5914A
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
________________________________________________________________ Maxim Integrated Products 1
RTRYEN
STATOUT
OCEN
DGND
VCC
CSP1
DRAIN1
GATE1
OUT1
CSP2
DRAIN2
FAULT
STAT1
STAT2
STAT3
STAT4
CSP4
DRAIN4
OUT4
GATE4
CSP3
DRAIN3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
OUT3
GATE3
VRLY
RLYD3
RLYD4
DGND
RLYD1
RLYD2
AGND
OUT2
GATE2
VDD
RTIM
ON4
RLYON4
ON3
RLYON3
ON2
RLYON2
ON1
RLYON1
DC
MQFP
TOP VIEW
+
MAX5913A
MAX5914A
Pin Configuration
Ordering Information
19-3302; Rev 1; 1/11
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
PART TEMP RANGE PIN-PACKAGE
MAX5913AEMH+ -40°C to +85°C 44 MQFP
MAX5913AEMH+T -40°C to +85°C 44 MQFP
MAX5914AEMH+ -40°C to +85°C 44 MQFP
MAX5914AEMH+T -40°C to +85°C 44 MQFP
Typical Operating Circuit appears at end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
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