General description
The NPS4001 is a 5.5 V, 55 mΩ load switch suitable
for applications up to 2 A.
The NPS4001 switch limits the output current to a
constant current by using a constant-current mode
when the output load exceeds the current limit
threshold or shorted. An internal voltage comparator
disables the load switch when the output voltage is
higher than the input to protect devices on the input
side of the switch. The FLG pin is an active low output
to indicate overcurrent, over temperature and reverse
voltage conditions.

Features and benefits
• Input operating voltage range (VIN): 2.5 V to 5.5 V
• Rated current (IMAX): 2 A
• ON resistance (RDS(on)):
• VIN = 5.5 V: 55 mΩ (typical)
• VIN = 3.6 V: 65 mΩ (typical)
• VIN = 2.5 V: 80 mΩ (typical)
• Constant current during current limit
• No body diode when disabled (no current path from
pin OUT to pin IN)
• Active reverse voltage protection
• Built in soft start
• UL 62368 recognition
• SOT753 (TSOP5) package
• ESD protection:
• HBM: ANSI/ESDA/JEDEC JS-001 class 2
exceeds 2000 V
• CDM: ANSI/ESDA/JEDEC JS-002 class C2a
exceeds 500 V
• IEC 61000-4-2 contact discharge 8000 V
• IEC 61000-4-2 air-gap discharge 15000 V
• Specified from -40 °C to +125 °C

Applications
• USB ports/hubs, laptops, docking station and
desktops
• Set top box
• HDTV
• Optical socket protection
• Current limiting circuits