TPS2557 精密可调节限流配电开关
TPS2557 描述
The TPS2556/57 power-distribution switches are intended for applications where precision current limiting is required or heavy capacitive loads and short circuits are encountered. These devices offer a programmable current-limit threshold between 500 mA and 5.0 A (typ) via an external resistor. The power-switch rise and fall times are controlled to minimize current surges during turn on/off.
TPS2556/57 devices limit the output current to a safe level by switching into a constant-current mode when the output load exceeds the current-limit threshold. The FAULT logic output asserts low during overcurrent and over temperature conditions.
|
TPS2556 |
TPS2557 |
| Vin(Min)(V) |
2.5 |
2.5 |
| Vin(Max)(V) |
6.5 |
6.5 |
| Current Limit(A) |
0.5 to 5.0 |
0.5 to 5.0 |
| Current Limit Accuracy @ 1A |
+/-7.0% (4100mA min / 4715mA max) |
+/-7.0% (4100mA min / 4715mA max) |
| rDS(on) per FET(Typ)(mOhms) |
22 |
22 |
| Pin/Package |
8SON |
8SON |
| Operating Temperature Range(°C) |
-40 to 85 |
-40 to 85 |
| Continuous Current(Max)(A) |
5 |
5 |
| Number of Switches |
1 |
1 |
| Enable |
Active Low |
Active High |
| Rating |
Catalog |
Catalog |
| Current Limit Topology |
Constant-Current |
Constant-Current |
TPS2557 特性
- Meets USB Current-Limiting Requirements
- Adjustable Current Limit, 500 mA–5 A (typ)
- +/- 6.5% Current-Limit Accuracy at 4.5 A
- Fast Overcurrent Response - 3.5-uS (typ)
- 22-mOhm High-Side MOSFET
- Operating Range: 2.5 V to 6.5 V
- 2-uA Maximum Standby Supply Current
- Built-in Soft-Start
- 15 kV / 8 kV System-Level ESD Capable
- UL Listed* – File No. E169910
- CB & Nemko Certification*
- *RILIM ≥ 24.9 kOhm (5A maximum)
- APPLICATIONS
- USB Ports/Hubs
- Digital TV
- Set-Top Boxes
- VOIP Phones
TPS2557 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） | Quantity |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| TPS2557DRBR |
ACTIVE |
-40 to 85 |
0.90 | 1ku |
SON (DRB) | 8 |
3000 | LARGE T&R |
2557 |
| TPS2557DRBT |
ACTIVE |
-40 to 85 |
1.05 | 1ku |
SON (DRB) | 8 |
250 | SMALL T&R |
2557 |
TPS2557 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| TPS2557DRBR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TPS2557DRBR |
TPS2557DRBR |
| TPS2557DRBT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TPS2557DRBT |
TPS2557DRBT |
TPS2557 应用技术支持与电子电路设计开发资源下载
- TPS2557 数据资料 dataSheet 下载.PDF
- TI 德州仪器USB 电源开关产品选型与价格 . xls
- PowerPADTM Thermally Enhanced Package
(PDF 1040 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- Comparing Performance of Current Ramp and Voltage Ramp Hot Swap Controller ICs
(PDF 356 KB)
- DN-103 Controlling a -5V Rail Using TPS2557 +3V to +8V Hot-Swap Power Manager
(PDF 37 KB)
- PowerPADTM Made Easy (PDF 57 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
TPS2557 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| TPS2557DRBEVM-423：用于 TPS2557 的评估模块 |
TPS2557DRBEVM-423 |
Texas Instruments |
开发电路板/EVM |