TPS22949 具有低噪声稳压功能和浪涌电流限制的限流负载开关
TPS22949 描述
The TPS22949 and TPS22949A are devices that provides protection to systems and loads in high-current conditions. The device contains a 500-m current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 4.5 V as well as a low-dropout (LDO) regulator with a fixed output voltage of 1.8 V.
The switch is controlled by an on/off input (EN1), which is capable of interfacing directly with low-voltage control signals. When the switch current reaches the maximum limit, the TPS22949/TPS22949A operates in a constant-current mode to prohibit excessive currents from causing damage. If the constant current condition still persists after 12 ms, these devices shut off the switch and pull the fault signal pin (OC) low.
|
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 |
TPS22949 特性
- Integrated Current Limiter
- Input Voltage Range: 1.62 V to 4.5 V
- Low ON-Resistance
rON = 300-mOhm at VIN = 4.5 V
rON = 350-mOhm at VIN = 3.3 V
rON = 400-mOhm at VIN = 2.5 V
rON = 600-mOhm at VIN = 1.8 V
- Integrated 100-mA Minimum Current Limit
- Undervoltage Lockout
- Fast-Current Limit Response Time
- Integrated Fault Blanking and Auto Restart
- Stable Without Current Limiter Output Capacitor (TPS22949A Only)
- Integrated Low-Noise RF LDO
- Input Voltage Range: 1.62 V to 4.5 V
- Low Noise: 50 uVrms (10 Hz to 100 kHz)
- 80-dB VIN PSRR (10 Hz to 10 kHz)
- Fast Start-Up Time: 130 us
- Low Dropout 100 mV at Iload =100 mA
- Integrated Output Discharge
- Stable With 2.2-uF Output Capacitor
- 1.8-V Compatible Control Input Threshold
- ESD Performance Tested Per JESD 22
- 3500-V Human-Body Model
(A114-B, Class II)
- 1000-V Charged-Device Model
(C101)
TPS22949 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 |
| TPS22949YZPR |
ACTIVE |
-40 to 85 |
0.70 | 1ku |
DSBGA (YZD) | 8 |
3000 | LARGE T&R |
4Z2 |
TPS22949 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 |
| TPS22949YZPR |
Green (RoHS & no Sb/Br) |
SNAGCU |
Level-1-260C-UNLIM |
TPS22949YZPR |
TPS22949YZPR |
TPS22949 应用技术支持与电子电路设计开发资源下载
- TPS22949 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)