TPS2149IDGN ,3.3V LDO + Dual Switch For USB Hubs, Active-Low Enablesmaximum ratings over operating free-air temperature (unless otherwise noted)Input voltage range: V ..
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TS7818CI , 3-Terminal Fixed Positive Voltage Regulator
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TS7818CZ , 3-Terminal Fixed Positive Voltage Regulator
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TPS2149IDGN-TPS2149IDGNR
3.3V LDO + Dual Switch For USB Hubs, Active-Low Enables
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FEATURES Complete Power Management Solution for
USB Bus-Powered Hubs 3.3-V 200 mA Low-Dropout Voltage Regulator Two 5-V 340-mΩ (Typ) High-Side MOSFETs Independent Thermal- and Short-Circuit
Protection for LDO and Each Switch Overcurrent Indicator With Transient Filter 2.9-V to 5.5-V Operating Range CMOS- and TTL-Compatible Enable Inputs 75-µA (Typ) Supply Current Available in 8-Pin MSOP (PowerPAD) −40°C to 85°C Ambient Temperature Range
APPLICATIONS USB Bus-Powered Hubs
− Keyboards
− Monitors
− Hub Boxes
DESCRIPTIONThe TPS2149 incorporates two power distribution
switches and an LDO in one small package, providing
a USB bus-powered hub power management solution
that saves up to 60% in board space over typical
implementations.
The TPS2149 meets USB 2.0 bus-powered hub
requirements. An integrated LDO regulates the 5-V bus
power down to 3.3 V for the USB controller. The two
MOSFET switches provide power to the downstream
ports. With independent enables, the downstream ports
remain unpowered until the hub completes
enumeration.
Each power-distribution switch is capable of supplying
200 mA of continuous current, and the independent
logic enables are compatible with 5-V logic and 3-V
logic. The switches and the LDO are designed with
controlled rise times and fall times to minimize current
surges.
The TPS2149 has active-low enables while the
TPS2159 has active-high enables.
LDO and dual switch family selection guide and schematicsPlease be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
