TPS22948 具有反向电流阻断功能的 0.3A 限流负载开关
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描述
The TPS22948 device is a small, single channel load switch with robust protection against fault cases with output current limiting, reverse current blocking, and thermal shutdown.
The switch ON state is controlled by a digital input that is capable of interfacing directly with low-voltage control signals. When power is first applied, a smart pull down is used to keep the ON pin from floating until system sequencing is complete. Once the pin is deliberately driven high (>VIH), the smart pull down will be disconnected to prevent unnecessary power loss. ™
TPS22948 is available in a standard SC-70 package characterized for operation over a temperature range of –40°C to 125°C.
特性
- Input operating voltage range (VIN):
2.5 V to 5.5 V
- Output current limit (ILIMIT):
240 mA (typical)
300 mΩ (typical)
- Slow Turn ON timing limits inrush current (typical):
Turn ON time (tON):
820 us at 6.6 mV/µs
- Always-ON Reverse Current Blocking (RCB):
ON State activation current (IRCB):
–200 mA (typical)
- Smart ON pin pull down (RPD,ON):
ON VIH (ION): 25 nA (maximum)
ON VIL (RPD,ON): 500 kΩ (typical)
ON State (IQ): 50 uA (typical)
OFF State (ISD): 0.3 uA (typical)
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