TPS22946
- Ultralow Quiescent Current 1 µA (Typical)
at VIN = 1.8 V - Input Voltage Range: 1.62 V to 5.5 V
- Low ON-Resistance
- rON = 300 mΩ at VIN = 5.5 V
- rON = 400 mΩ at VIN = 3.3 V
- rON = 500 mΩ at VIN = 2.5 V
- rON = 600 mΩ at VIN = 1.8 V
- Selectable Minimum Current Limit:
155 mA, 70 mA, or 30 mA - Integrated Inrush Current Time-out (8 ms)
- Shutdown Current: < 1 µA
- Thermal Shutdown
- Fault Blanking
- Auto Restart
- Overcurrent Condition Time-out (Automatic
Disable for Permanent Overcurrent) - 1.8-V Compatible Control Input
- ESD Performance Tested Per JESD 22
- 6000-V Human-Body Model
(A114-B, Class II)
- 6000-V Human-Body Model
- Tiny DSGBA Package 1.4 mm × 0.9 mm (YZP)
The TPS22946 is an ultralow power load switch that provides protection to systems and loads in high-current conditions. The device contains a 300-mΩ current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 5.5 V. The switch is controlled by an on/off input (ON), which can interface directly with low-voltage control signals. The TPS22946 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 TPS22946 operates in a constant-current mode to prohibit excessive currents from causing damage. The current limit can be selected using the CL input: a high CL input sets the current limit to 155 mA, a low CL input sets the current limit to 70 mA, and a floating CL input sets the current limit to 30 mA.
If the constant current condition persists after 10 ms, the switch is turned off and the fault signal pin (OC) is pulled low. The TPS22946 has an auto-restart feature which turns the switch on again after 70 ms if the ON pin is still active. If the TPS22946 remains in an over-current condition for 5 seconds, the device shuts off until it is turned on again by setting the ON control signal off and then on.
If the device is used to protect an LDO, the inrush current required by the LDO at startup can, in some cases, exceed the current limit and initiate a blanking (current limiting) condition. The TPS22946 provides allowance for this scenario during startup of the LDO by temporarily increasing the current limit to 435 mA for 8 ms after the load switch is enabled.
The TPS22946 is available in space-saving 6-pin DSBGA (YZP) package. The device is characterized for operation over the free-air temperature range of –40°C to 85°C.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TPS22946 Ultralow Power, Low Input Voltage, Current-Limited Load Switch With Shutoff, Auto-Restart, and Overcurrent Condition Time-Out datasheet (Rev. B) | PDF | HTML | 2015年 4月 8日 |
| Application note | Load Switch Thermal Considerations (Rev. A) | 2018年 10月 11日 | ||
| Application note | Basics of Load Switches (Rev. A) | 2018年 9月 5日 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| Application note | Basics of eFuses (Rev. A) | 2018年 4月 5日 | ||
| Technical article | How to use load switches to power your wearable | PDF | HTML | 2015年 10月 19日 | |
| EVM User's guide | Using the TPS22946EVM-499 Single Channel Load Switch IC | 2013年 2月 26日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
TPS22946EVM-499 — TPS22946 電流限制負載開關評估模組
The TPS22946EVM-499 evaluation module (EVM) allows the user to connect power to and control the TPS22946 ultra-small, CSP-6 package load switch. Parameters such as on state resistance, slew rate and current limit properties can be easily evaluated.
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
TIDA-010019 — 溫度感測器中適用於冷接點補償法的 RTD 更換參考設計
TIDA-010008 — 適合於電網應用之瞬態保護的平箝制 TVS 架構參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YZP) | 6 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。