TPS22945 具有关断和自动重启功能的低输入电压限流负载开关
TPS22945 描述
The TPS2294x load switches provide protection to systems and loads in high-current conditions. The devices contain a 400-m current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 5.5 V. Current is prevented from flowing when the MOSFET is off. The switch is controlled by an on/off input (ON), which is capable of interfacing directly with low-voltage control signals. The TPS2294x includes thermal shutdown protection that prevents damage to the device when a continuous over-current condition causes excessive heating by turning off the switch.
When the switch current reaches the maximum limit, the TPS22941/2/3/4/5 operates in a constant-current mode to prohibit excessive currents from causing damage.
|
TPS22941 |
TPS22942 |
TPS22943 |
TPS22944 |
TPS22945 |
TPS22946 |
TPS22949 |
TPS22949A |
| Adjustable Current Limit(Min)(A) |
0.04 |
0.1 |
0.04 |
0.1 |
0.1 |
0.155 ,0.07 ,0.03 |
0.1 |
0.1 |
| rDS(on) per FET(Typ)(mOhms) |
400 |
400 |
400 |
400 |
400 |
300 |
300 |
300 |
| Number of FETs |
1 |
1 |
1 |
1 |
1 |
1 |
2 |
2 |
| Enable/Shutdown |
Active Low |
Active Low |
Active High |
Active High |
Active High |
Active High |
Active High |
Active High |
| Vin(Min)(V) |
1.62 |
1.62 |
1.62 |
1.62 |
1.62 |
1.62 |
1.62 |
1.62 |
| Vin(Max)(V) |
5.5 |
5.5 |
5.5 |
5.5 |
5.5 |
5.5 |
4.5 |
4.5 |
| Iq(Typ)(uA) |
40 |
40 |
40 |
40 |
40 |
1 |
85 |
85 |
| Pin/Package |
5SC70 |
5SC70 |
5SC70 |
5SC70 |
5SC70 |
6DSBGA |
8DSBGA |
8DSBGA, 8SON |
TPS22945 特性
- Input Voltage Range: 1.62 V to 5.5 V
- Low ON resistance
- rON = 0.4 Ohm at VIN = 5.5 V
- rON = 0.5 Ohm at VIN = 3.3 V
- rON = 0.6 Ohm at VIN = 2.5 V
- rON = 0.8 Ohm at VIN = 1.8 V
- Minimum Current Limit: 40 mA or 100 mA
- Undervoltage Lockout
- Thermal Shutdown
- Shutdown Current < 1 uA
- Fast Current Limit Response Time
- Fault Blanking
- Auto Restart
- 1.8-V Compatible Control Input Thresholds
- ESD Performance Tested Per JESD 22
- 4000-V Human-Body Model
(A114-B, Class II)
- 1000-V Charged-Device Model (C101)
- Tiny SC-70 (DCK) Package
- APPLICATIONS
- Low-Current Sensor Protection
TPS22945 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| TPS22945DCKR |
ACTIVE |
-40 to 85 |
0.36 | 1ku |
SC70 (DCK) | 5 |
3000 | LARGE T&R |
(4EJ, 4EN) |
| TPS22945DCKRG4 |
ACTIVE |
-40 to 85 |
0.36 | 1ku |
SC70 (DCK) | 5 |
3000 | LARGE T&R |
(4EJ, 4EN) |
TPS22945 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 |
| TPS22945DCKR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
TPS22945DCKR |
TPS22945DCKR |
| TPS22945DCKRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
TPS22945DCKRG4 |
TPS22945DCKRG4 |
TPS22945 应用技术支持与电子电路设计开发资源下载
- TPS22945 数据资料 dataSheet 下载.PDF
- TI 德州仪器LDO低压差线性稳压器驱动器选型与价格参考 . xls
- Dual MOSFET Driver
(PDF 498 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- LDO PSRR Measurement Simplified
(PDF 140 KB)
- LDO Noise Demystified
(PDF 782 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)