TPS2149| Datasheet

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TPS2149 TPS2159

SLVS401 - AUGUST 2001

3.3 V LDO AND DUAL SWITCH FOR USB BUS POWERED HUB POWER MANAGEMENT
FEATURES D Complete Power Management Solution for D D D D D D D D D
USB Bus-Powered Hubs 3.3-V 200 mA Low-Dropout Voltage Regulator Two 5-V 340-m (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-uA (Typ) Supply Current Available in 8-Pin MSOP (PowerPAD) -40 C to 85 C Ambient Temperature Range

DESCRIPTION
The 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.

APPLICATIONS D USB Bus-Powered Hubs
- Keyboards - Monitors - Hub Boxes

LDO and dual switch family selection guide and schematics
TPS2145/55 TSSOP-14 VIN/SW1 LDO_EN LDO TPS2147/57 MSOP-10 VIN/SW1 LDO LDO_OUT OC1 OUT1 EN1 SW2 EN2 GND OUT2 OC2 LDO_EN EN2 EN1 GND TPS2148/58 MSOP-8 LDO LDO_OUT OUT2 OUT1 EN1 EN2 GND OUT1 OC OUT2 VIN TPS2149/59 MSOP-8 LDO LDO_OUT

LDO_OUT LDO_ADJ OC1 OUT1

VIN/SW1

EN1 SW2 EN2 GND

OUT2 OC2

Please 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. PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

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