MAX5914A:+48V Quad Hot-Swap Controllers For Power-Over-LAN

Highly Integrated Board Solution Reduces Board Space, Cost, and System Design Time

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 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 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 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.

Key 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: Typical Operating Circuit
MAX5913A, MAX5914A: Typical Operating Circuit
Applications/Uses
  • IP Phone Switches/Routers
  • Midspan Power-Over-MDI
  • Network Switches/Routers
  • Power-Over-LAN
  • Power-Over-MDI
  • Telecom Line Cards
DataSheet
titleDownload file
MAX5913A-MAX5914A Data SheetMAX5913A-MAX5914A.pdf
Parametrics
Part NumberVIN
(V)
VIN
(V)
Circuit Breaker/ Current LimitCircuit Breaker/Current Limit Threshold
(mV)
Fault Condition ControlChannelsFeaturesPackage/PinsBudgetary
Price
minmaxSee Notes
MAX5914A3572Current Limit125 to 160Latched Off
Periodic Retry
Programmable
4IEEE® 802.3af Compatible
On-Board Charge Pumps to Drive External
MQFP/44$9.20 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX5914AEMHNo Longer AvailableMAX5914AEMH+MQFP;44 pin-40°C to +85°CSee data sheet
MAX5914AEMH+ActiveMQFP,;44 pin;181.2 mm²-40°C to +85°CLead Free
MAX5914AEMH+DActiveMQFP,;44 pin;181.2 mm²-40°C to +85°CLead Free
MAX5914AEMH+TActiveMQFP,;44 pin;181.2 mm²-40°C to +85°CLead Free
MAX5914AEMH+TDNo Longer AvailableMQFP;-40°C to +85°CSee data sheet
MAX5914AEMH-TNo Longer AvailableMAX5914AEMH+TMQFP;44 pin-40°C to +85°CSee data sheet
MAX5913A-MAX5914A.pdf MAX5914A
MAX5913A-MAX5914A.pdf MAX5913A