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TPS22946

正在供貨

具有可選電流限制 5.5V、0.15A、400mΩ 負載開關(guān)

產(chǎn)品詳情

Imax (A) 0.235 Vin (max) (V) 5.5 Vin (min) (V) 1.62 Number of channels 1 Features Thermal shutdown Quiescent current (Iq) (typ) (μA) 1.3 Soft start Fixed Rise Time Rating Catalog Ron (typ) (mΩ) 400 Shutdown current (ISD) (typ) (μA) 0.1 Current limit type Adjustable Function Thermal shutdown FET Internal Operating temperature range (°C) -40 to 85 Device type Load switches
Imax (A) 0.235 Vin (max) (V) 5.5 Vin (min) (V) 1.62 Number of channels 1 Features Thermal shutdown Quiescent current (Iq) (typ) (μA) 1.3 Soft start Fixed Rise Time Rating Catalog Ron (typ) (mΩ) 400 Shutdown current (ISD) (typ) (μA) 0.1 Current limit type Adjustable Function Thermal shutdown FET Internal Operating temperature range (°C) -40 to 85 Device type Load switches
DSBGA (YZP) 6 2.1875 mm2 1.75 x 1.25
  • 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)
  • Tiny DSGBA Package 1.4 mm × 0.9 mm (YZP)
  • 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)
  • 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.

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.
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類型 標題 下載最新的英語版本 日期
* 數(shù)據(jù)表 TPS22946 Ultralow Power, Low Input Voltage, Current-Limited Load Switch With Shutoff, Auto-Restart, and Overcurrent Condition Time-Out 數(shù)據(jù)表 (Rev. B) PDF | HTML 2015年 4月 8日
應(yīng)用手冊 Load Switch Thermal Considerations (Rev. A) 2018年 10月 11日
應(yīng)用手冊 Basics of Load Switches (Rev. A) 2018年 9月 5日
選擇指南 電源管理指南 2018 (Rev. K) 2018年 7月 31日
選擇指南 電源管理指南 2018 (Rev. R) 2018年 6月 25日
應(yīng)用手冊 Basics of eFuses (Rev. A) 2018年 4月 5日
技術(shù)文章 How to use load switches to power your wearable PDF | HTML 2015年 10月 19日
應(yīng)用手冊 負載開關(guān)：什么是負載開關(guān)，為什么需要負載開關(guān)，如何選擇正確的負載開關(guān)？ 最新英語版本 (Rev.A) 2014年 8月 11日
EVM 用戶指南 Using the TPS22946EVM-499 Single Channel Load Switch IC 2013年 2月 26日

設(shè)計和開發(fā)

如需其他信息或資源，請點擊以下任一標題進入詳情頁面查看（如有）。

評估板

TPS22946EVM-499 — TPS22946 限流負載開關(guān)評估模塊

借助 TPS22946EVM-499 評估模塊 (EVM)，用戶能夠?qū)㈦娫催B接到采用超小型 CSP-6 封裝的 TPS22946 負載開關(guān)并對其進行控制。可輕松地對導(dǎo)通電阻、壓擺率和限流屬性等參數(shù)進行評估。

用戶指南: PDF
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參考設(shè)計

TIDA-010019 — 針對溫度傳感器中冷端補償?shù)?RTD 替代參考設(shè)計

使用熱電偶 (TC) 的溫度檢測應(yīng)用需要精確的本地溫度傳感器來實現(xiàn)高精度。在此參考設(shè)計中，重點介紹并解決了針對冷端補償 (CJC) 或包含超低功耗 TC 模擬前端等設(shè)計難題的解決方案。針對精確的 4mA 至 20mA 傳感器優(yōu)化了功耗和精度性能，同時還展示了不同 CJC 和 TC 前端實現(xiàn)的性能。
設(shè)計指南: PDF
原理圖: PDF
參考設(shè)計

TIDA-010008 — 用于為電網(wǎng)應(yīng)用提供瞬態(tài)保護且基于平緩鉗位 TVS 的參考設(shè)計

該參考設(shè)計采用多種方法，使用平緩鉗位浪涌保護、ESD 器件、電子保險絲或負載開關(guān)，來保護交流或直流模擬輸入、直流模擬輸出、交流或直流二進制輸入、帶高側(cè)或低側(cè)驅(qū)動器的數(shù)字輸出、LCD 偏置電源、USB 接口（電源和數(shù)據(jù)）和具有 24V、12V 或 5V 輸入的板載電源（用于多個電網(wǎng)應(yīng)用），防止過壓、過載和瞬態(tài)（1.2/50μs，42Ω）的影響。該設(shè)計可監(jiān)測溫度、濕度、磁場和電源以進行診斷。
設(shè)計指南: PDF
原理圖: PDF
封裝 引腳 CAD 符號、封裝和 3D 模型
DSBGA (YZP) 6 Ultra Librarian

訂購和質(zhì)量

包含信息：
  • RoHS
  • REACH
  • 器件標識
  • 引腳鍍層/焊球材料
  • MSL 等級/回流焊峰值溫度
  • MTBF/時基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續(xù)可靠性監(jiān)測
包含信息：
  • 制造廠地點
  • 封裝廠地點

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