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LM5051
www.ti.com SNVS702D – OCTOBER 2011 – REVISED MARCH 2013 LM5051 Low Side OR-ing FET Controller
Check for Samples: LM5051 FEATURES DESCRIPTION The LM5051 Low 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. 1 2 Wide operating input voltage range: -6V to 100V
-100V Transient Capability
Gate drive for external N-Channel MOSFET
MOSFET diagnostic test mode
Fast 50ns response to current reversal
2A peak gate turn-off current
Package: 8-Lead SOIC The LM5051 controller provides 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 LM5051 can connect
power supplies ranging from -6V to -100V and can
withstand transients up to -100V. APPLICATIONS Active OR-ing of Redundant (N+1) Power
Supplies The LM5051 also provides a FET test diagnostic
mode which allows the system controller to test for
shorted MOSFETs. Typical Application Circuits …
