TPS2147
- Two 340-m
(Typical) High-Side MOSFETs - 200 mA Low-Dropout Voltage Regulator In Fixed 3.3-V or Adjustable Versions
- Independent Thermal- and Short-Circuit Protection for LDO and Each Switch
- Overcurrent Indicators With Transient Filter
- 2.9-V to 5.5-V Operating Range
- CMOS- and TTL-Compatible Enable Inputs
- 75-uA (Typical) Supply Current
- Available in 10-Pin MSOP or 14-Pin TSSOP (PowerPAD™)
- -40°C to 85°C Ambient Temperature Range
- APPLICATIONS
- USB Hubs and Peripherals
- Keyboards
- Zip Drives
- Speakers and Headsets
- PDAs and Portable Electronics
- DSP Power Sequencing
- USB Hubs and Peripherals
PowerPAD is a trademark of Texas Instruments.
Two power-distribution switches and an adjustable (TPS2145) or fixed (TPS2147) LDO are incorporated in one small package, providing a power management solution that saves up to 60% in board space over typical implementations.
Designed to meet USB 2.0 bus-powered hub requirements, these devices also allow core and I/O
voltage sequencing in DSP applications, or power segmentation in portable equipment. Each current-limited
switch is a 340-m N-channel MOSFET capable of supplying 200 mA of continuous current. A logic
enable compatible with 5-V logic and 3-V logic controls each MOSFET as well as the LDO in the TPS2145. The
internal charge pump provides the gate drive controlling the power-switch rise times and fall times, minimizing
current surges during switching. The charge pump requires no external components.
The LDO has a drop-out voltage of only 0.35 V and with the independent enable on the TPS2145 LDO, the LDO can be used as an additional switch. The LDO output range for the TPS2145 is 1 V to 3.3 V, while the TPS2147 is fixed at 3.3 V.
The TPS2145 and TPS2147 have active-low switch enables and the TPS2155 and TPS2157 have active-high switch enables.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LDO and Dual Switch with Controlled Rise Times for DSP and Portable Applications datasheet | 2001/8/6 |