MAX5913A Datasheet, PDF (1/20 Pages) Maxim Integrated Products – +48V Quad Hot-Swap Controllers For Power-Over-LAN

19-3302; Rev 1; 1/11
+48V Quad Hot-Swap Controllers For
Power-Over-LAN
General Description
The MAX5913A/MAX5914A are quadruple hot-swap con-
trollers. The MAX5913A/MAX5914A independently con-
trol four external n-channel switches to hot-swap system
loads from a single V_CC 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 under-
voltage lockout (UVLO) function that prevents the FET
from turning on, if V_CC does not exceed the default
value of +32V. The devices also feature a +12V relay
driver with 100mA current drive capable of driving low-
voltage +3.3V relays. The MAX5913A features an
active-low relay driver that sinks current when the relay
output is enabled. The MAX5914A features an active-
high 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 V_CC 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 off-
time 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
o Wide Operating Input Voltage Range:
+35V to +72V
o IEEE^® 802.3af Compatible
o Four Independent Power Switch Controllers
o Open-Circuit Detector
o On-Board Charge Pumps to Drive External
n-Channel FETs
o Current Sense with External Resistor
o Foldback Current Limiting
o +32V Input Undervoltage Lockout
o On-Chip +12V, 100mA Voltage Relay Drivers
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX5913AEMH+
MAX5913AEMH+T
MAX5914AEMH+
MAX5914AEMH+T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
44 MQFP
44 MQFP
44 MQFP
44 MQFP
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Pin Configuration
TOP VIEW
+
FAULT 1
STAT1 2
STAT2 3
STAT3 4
STAT4 5
CSP4 6
DRAIN4 7
OUT4 8
GATE4 9
CSP3 10
DRAIN3 11
MAX5913A
MAX5914A
33 RTRYEN
32 STATOUT
31 OCEN
30 DGND
29 V_CC
28 CSP1
27 DRAIN1
26 GATE1
25 OUT1
24 CSP2
23 DRAIN2
Typical Operating Circuit appears at end of data sheet.
IEEE is a registered service mark of the Institute of Electrical and
Electronics Engineers, Inc.
MQFP
________________________________________________________________ Maxim Integrated Products 1
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.