LM5050MK-2 Datasheet, PDF (1/22 Pages) Texas Instruments – LM5050-2 High Side OR-ing FET Controller

LM5050-2
www.ti.com
SNVS679B – NOVEMBER 2010 – REVISED MARCH 2013
LM5050-2 High Side OR-ing FET Controller
Check for Samples: LM5050-2
FEATURES
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•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 V_DS 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.
Typical Application Circuits
V_IN
V_LOGIC
Status
Shutdown
GND
+6V to +75V
R_PULL-UP
Low= OK, High= Fault
Low= FET On, High= FET Off
IN
nFGD
GATE
OUT
LM5050-2
OFF
GND
V_OUT
GND
Figure 1. Full Application with MOSFET Diagnostic
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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