TPS2140
- Complete Power Management Solution for USB High-Power Peripherals
- 250 mA Low-Dropout Regulator (LDO) With Enable and 325 mA (Typ) Current Limit
- LDO Supports 2.7 V to 5.5 V VIN and 0.9 V to 3.3 V Adjustable VOUT
- 40 m (Typ) High-Side MOSFET With Dual Current Limit
- Undervoltage Lockout and Power Good for LDO and Switch
- CMOS- and TTL-Compatible Enable Inputs
- 85 µA (Typ) Supply Current
- 5 µA (Typ) Standby Supply Current
- Available in 14-Pin HTSSOP (PowerPAD™)
- –40°C to 85°C Ambient Temperature Range
- Alternative to TPS2148/58 3.3-V LDO With 3.3-V Switch and 5-V Switch
- APPLICATIONS
- High-Power USB™ Peripherals
- ADSL Modems
- Digital Still and PC Cameras
- Zip Drives
- Speakers
- DSP Sequencing
- High-Power USB™ Peripherals
PowerPAD is a trademark of Texas Instruments.
USB is a trademark of Universal Serial Bus Association.
The TPS2140/41/50/51 is a USB 1.0 and 2.0 Specification-compatible IC containing a dual-current-limiting power switch and an adjustable low dropout regulator (LDO). Both the switch and LDO limit inrush current by controlling the turnon slew rate. The unique dual-current-limiting feature of the switch allows USB peripherals to utilize high-value capacitance at the output of the switch, while keeping the inrush current low. During turn on, the switch limits the current delivered to the capacitive load to less than 100 mA. When the output voltage from the switch reaches about 93% of the input voltage, the switch power good output goes high, and the switch current limit increases to 800mA (minimum), at which point higher current loads can be turned on. The higher current limit provides short circuit protection while allowing the peripheral to draw maximum current from the USB bus.
The switch and LDO function independently, providing flexibility in DSP applications requiring separate core and I/O voltages. For example, in a DSP application operating from a 3.3-V rail, the LDO can supply the DSP core voltage down to 0.9 V, while the switch powers the 3.3-V (typical) DSP I/O supply. If supply sequencing is required, the LDO power good output can be used to enable the switch.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | Adjustable LDO and Switch w/ Dual Current Limit for USB High-Power Peripheral 数据表 (Rev. A) | 2006年 5月 18日 | |||
应用手册 | Using Dual Current Limited TPS2140/41/50/51 For USB & Portable Applications | 2003年 2月 14日 |
设计和开发
如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。
封装 | 引脚 | 下载 |
---|---|---|
HTSSOP (PWP) | 14 | 查看选项 |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点