LM5050MK-1 NOPB.pdf

1 Features

1• Available in Standard and AEC-Q100 Qualified

Versions LM5050Q0MK-1 (up to 150°C TJ

) and

LM5050Q1MK-1 (up to 125°C TJ

)

• Functional safety capable

– Documentation available to aid functional

safety system design

• Wide Operating Input Voltage Range, VIN: 1 V to

75 V (VBIAS required for VIN < 5 V)

• 100-V Transient Capability

• Charge Pump Gate Driver for External N-Channel

MOSFET

• Fast 50-ns Response to Current Reversal

• 2-A Peak Gate Turnoff Current

• Minimum VDS Clamp for Faster Turnoff

• Package: SOT-6 (Thin SOT-23-6)

2 Applications

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

Supplies

3 Description

The LM5050-1/-Q1 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 ORing controller allows

MOSFETs to replace diode rectifiers in power

distribution networks thus reducing both power loss

and voltage drops.

The LM5050-1/-Q1 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 LM5050-1/-

Q1 can connect power supplies ranging from 5 V to

75 V and can withstand transients up to 100 V.