YB1901 Datasheet, PDF (1/12 Pages) YOBON TECHNOLOGIES,INC. – 2.0A High-Side Power Switch with Flag

YB1901
2.0A High-Side Power Switch with Flag
Description
The YB1901 is a low operation voltage,
single N-channel MOSFET high-side
power switch, optimized for low power
consumption system. A small internal
charge-pump circuitry is built in the
YB1901 to drive the internal MOSFET
switch for reaching an average R_DS(ON)
resistance of 120mΩ. A fault flag output is
available to indicate an abnormal condition
during operation.
Some other features include low in-rush
current during plug-in, thermal shutdown to
prevent switch failure from high-current
loads, under-voltage lock-out to keep the
chip off when below normal operation
supply, a short-circuit protection to avoid
grounded big current. The quiescent
current needed to run the change-pump is
as low as 60μA at 5V input. It makes the
device ideal for portable battery operated
system.
The YB1901 power switch is available in
SOT-25, MSOP8, SOP8 packages.
Features
„ Built-In N-Channel MOSFET
„ Typical R_DS(ON) Resistance : 120 mΩ
„ Low Quiescent Current : 60μA at 5V
„ Low Shutdown Current : <1μA
„ Current Limit at 2.0A
„ Wide Input Voltage Range : 2.7 ~ 5.5V
„ Hot Plug-In Application
„ 2.4V Under-Voltage Lock-Out
„ Thermal Shutdown Protection
„ Short-Circuit Protection
„ Reverse Current Flow Blocking
„ Open-Drain Fault Flag
„ SOT-25, MSOP8, SOP8 Packages
„ Green Package (RoHS) Available
Applications
„ PDA, DSC, GPS
„ USB Peripherals
„ PC Cards
„ PCMCIA Cards
„ Notebook PC
„ Battery-Charger Circuits
„ Battery-Powered Instruments
Typical Application Circuit
2.7~5V
VIN
Vout
System
Power
1u
ON
OFF
YB1901
100K
1u
EN
OCB
Fault
Flag
Figure 1: Typical Application Circuit
YB1901 Rev.1.2
www.yobon.com.tw
1