Overview
The TPS22944DCKR, produced by Texas Instruments, is a low-input-voltage current-limited load switch designed for a wide range of applications requiring current limiting and fault protection. This device is part of the TPS2294x family and is characterized by its compact SC70-5 (DCK) package, making it ideal for space-constrained designs. The TPS22944DCKR operates over a free-air temperature range of –40°C to 85°C and is compatible with input voltages from 1.62 V to 5.5 V.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage (VIN) | 1.62 | 5.5 | V | |
| Output Voltage (VOUT) | VIN | VIN | V | |
| Ambient Free-Air Temperature (TA) | –40 | 85 | °C | |
| Quiescent Current (IIN) | 40 | 80 | 80 | μA |
| OFF-State Supply Current (IIN(OFF)) | 1 | 1 | μA | |
| ON-State Resistance (rON) | 0.8 | 0.9 | 1.1 | Ω |
| Current Limit (ILIM) | 100 | 150 | 200 | mA |
| Thermal Shutdown (TSD) | 140 | 150 | °C | |
| Turn-ON Time (tON) | 60 | 100 | μs | |
| Turn-OFF Time (tOFF) | 30 | 60 | μs |
Key Features
- Current Limiting: The device operates in a constant-current mode when the switch current reaches the maximum limit of 100 mA to prevent excessive currents.
- Overcurrent, Undervoltage, and Overtemperature Protection: The device asserts the OC pin low during fault conditions and can auto-restart if the ON pin is still active.
- Compact Package: Available in a tiny SC70-5 (DCK) package, ideal for space-constrained designs.
- ESD Performance: Tested per JESD 22 with 4000-V Human-Body Model and 1000-V Charged-Device Model.
- Control Input Compatibility: 1.8-V compatible control input thresholds.
Applications
- Notebooks and PDAs: Ideal for protecting battery and power management circuits.
- GPS Devices and MP3 Players: Suitable for low-power, portable electronics.
- HDMI Connector Protection: Protects against overcurrent and fault conditions in HDMI connectors.
- Peripheral Ports: Used in various peripheral ports to ensure safe and reliable operation.
Q & A
- What is the input voltage range for the TPS22944DCKR? The input voltage range is from 1.62 V to 5.5 V.
- What is the current limit for the TPS22944DCKR? The current limit is 100 mA.
- Does the TPS22944DCKR have thermal shutdown protection? Yes, it has thermal shutdown protection with a threshold of 140°C.
- What is the typical turn-on time for the TPS22944DCKR? The typical turn-on time is 60 μs.
- Is the TPS22944DCKR ESD protected? Yes, it is tested per JESD 22 with 4000-V Human-Body Model and 1000-V Charged-Device Model.
- What is the package type for the TPS22944DCKR? It is available in a SC70-5 (DCK) package.
- Does the TPS22944DCKR support auto-restart after a fault condition? No, the TPS22944 does not have an auto-restart feature; it remains in constant-current mode until the fault is cleared.
- What are the typical applications for the TPS22944DCKR? It is used in notebooks, PDAs, GPS devices, MP3 players, and peripheral ports.
- What is the operating temperature range for the TPS22944DCKR? The operating temperature range is from –40°C to 85°C.
- How does the OC pin behave during fault conditions? The OC pin is set active low to signal fault modes such as overcurrent, undervoltage, or overtemperature.
