1FEATURES

2• Wide Operating Input Voltage Range: +6V to

+75V

• +100 Volt Transient Capability

• Charge Pump Gate Driver for External N-

Channel MOSFET

• MOSFET Diagnostic Test Mode

• Fast 50ns Response to Current Reversal

• 2A Peak Gate Turn-off Current

• Minimum VDS Clamp for Faster Turn-off

• Package: SOT-6 (Thin SOT23-6)

APPLICATIONS

• Active OR-ing of Redundant (N+1) Power

Supplies

DESCRIPTION

The LM5050-2 High Side OR-ing FET Controller

operates in conjunction with an external MOSFET as

an ideal diode rectifier when connected in series with

a power source. This OR-ing controller allows

MOSFETs to replace diode rectifiers in power

distribution networks thus reducing both power loss

and voltage drops.

The LM5050-2 controller provides charge pump gate

drive for an external N-Channel MOSFET and a fast

response comparator to turn off the FET when

current flows in the reverse direction. The LM5050-2

can connect power supplies ranging from +6V to

+75V and can withstand transients up to +100V.

The LM5050-2 also provides a FET test diagnostic

mode which allows the system controller to test for

shorted MOSFETs.