LM5050-1 Datasheet, PDF (1/17 Pages) Texas Instruments – High Side OR-ing FET Controller

LM5050-1
January 12, 2012
High Side OR-ing FET Controller
General Description
The LM5050-1 High Side OR-ing FET Controller operates in
conjunction with an external MOSFET as an ideal diode rec-
tifier when connected in series with a power source. This
ORing controller allows MOSFETs to replace diode rectifiers
in power distribution networks thus reducing both power loss
and voltage drops.
The LM5050-1 controller provides charge pump gate drive for
an external N-Channel MOSFET and a fast response com-
parator to turn off the FET when current flows in the reverse
direction. The LM5050-1 can connect power supplies ranging
from +5V to +75V and can withstand transients up to +100V.
Features
■ ^{Wide Operating Input Voltage range, V}_IN^{: 5V to 75V}
■ ^{+100 Volt transient capability}
■ ^{Charge pump gate driver for external N-Channel MOSFET}
■ ^{Fast 50ns response to current reversal}
■ ^{2A peak gate turn-off current}
■ ^{Minimum V}_DS ^{clamp for faster turn-off}
■ ^{Package: TSOT-6 (Thin SOT23-6)}
Applications
■ ^{Active OR-ing of Redundant (N+1) Power Supplies}
Typical Application Circuits
FIGURE 1. Full Application
30104804
30104833
FIGURE 2. Typical Redundant Supply Configuration
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