TPS22959
- Integrated Single Channel Load Switch
- VBIAS Voltage Range: 2.5 V to 5.5 V
- VIN Voltage Range: 0.8 V to 5.5 V
- Ultra Low RON Resistance
- RON = 4.4 mΩ at VIN = 5 V (VBIAS = 5 V)
- 15 A Maximum Continuous Switch Current
- Low Quiescent Current
- (20 µA for VBIAS = 5 V)
- Low Shutdown Current
- (1 µA for VBIAS = 5 V)
- Low Control Input Threshold Enables Use of 1.2 V or Higher GPIO
- Controlled and Fixed Slew Rate Across VBIAS and
VIN
- tR = 2663 µs at VIN = 5 V (VBIAS = 5 V)
- Quick Output Discharge (QOD)
- SON 8-Pin Package with Thermal Pad
- ESD Performance Tested per JESD 22
- 2-kV Human-Body Model (HBM)
- 1-kV Charged-Device Model (CDM)
The TPS22959 is a small, ultra-low RON, single channel load switch with controlled turn on. The device contains an N-channel MOSFET that can operate over an input voltage range of 0.8 V to 5.5 V and supports a maximum continuous current of 15 A.
The combination of ultra-low RON and high current capability of the device makes it ideal for driving processor rails with very tight voltage dropout tolerances. The controlled rise time of the device greatly reduces inrush current caused by large bulk load capacitances, thereby reducing or eliminating voltage droop on the power supply. The switch can be independently controlled via the ON pin, which is capable of interfacing directly with low-voltage control signals originating from microcontrollers or low voltage discrete logic. The device further reduces the total solution size by integrating a 224-Ω pull-down resistor for quick output discharge (QOD) when the switch is turned off.
The TPS22959 is available in a small 3.00 mm x 3.00 mm WSON-8 package (DNY). The DNY package integrates a thermal pad which allows for high power dissipation in high current and high temperature applications. The device is characterized for operation over the free-air temperature range of –40°C to 105°C.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TPS22959 5.5-V, 15-A, 4.4-mΩ On-Resistance Load Switch datasheet (Rev. B) | PDF | HTML | 2015/7/27 | ||
| 應用說明 | Load Switch Thermal Considerations (Rev. A) | 2018/10/11 | ||||
| 應用說明 | Basics of Load Switches (Rev. A) | 2018/9/5 | ||||
| 應用說明 | Selecting a Load Switch to Replace a Discrete Solution | 2017/4/30 | ||||
| 應用說明 | Timing of Load Switches | 2017/4/27 | ||||
| 應用說明 | Managing Inrush Current (Rev. A) | 2015/5/28 |
設計與開發
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TPS22959EVM-079 — TPS22959 評估模組
TPS22959EVM 是一款雙面 PCB，內含 TPS22959 負載開關裝置。與裝置及 PCB 佈線圖路由連接的 VIN 和 VOUT 能夠處理高連續電流，並提供出入測試中裝置的低電阻路徑。測試點連線可讓 EVM 使用者利用使用者定義的測試條件來控制裝置，並進行準確的 RON 量測。
TIDA-00513 — 適用於較高輸出電流和較低導通電阻的並聯負載開關參考設計
TIDA-00513 展示了兩個並聯負載開關的範例。透過將多個通道並聯配置，可以擴展現有負載開關的功能。
第一個範例中，使用了雙通道 TPS22966 的兩個通道，總輸出電流為 10A。
第二個範例中，使用了三個並聯的 TPS22959，總輸出電流為 30A。
TIDA-00514 — 適用於電源多工和反向電流阻斷的負載開關參考設計
在可以由多個電源供電的系統中，在電源之間切換時實現無縫過渡可能具有挑戰性，尤其是在還需要阻斷反向電流流動的情況下。此參考設計示範如何使用兩個負載開關在兩個電源之間進行電源多工切換，並阻斷反向電流。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WSON (DNY) | 8 | Ultra Librarian |
訂購與品質
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。