TPS2149
- Complete Power Management Solution for 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
- APPLICATIONS
- USB Bus-Powered Hubs
- Keyboards
- Monitors
- Hub Boxes
- USB Bus-Powered Hubs
PowerPAD is a trademark of Texas Instruments.
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.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | 3.3-V LDO and Dual Switch For USB Bus-Powered Hub Power Management datasheet | 2001. 8. 8 |