TPS22949ADRGR
Active4.5-V, 0.1-A, 350-MΩ, LOAD SWITCH WITH CURRENT LIMIT AND LDO
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TPS22949ADRGR
Active4.5-V, 0.1-A, 350-MΩ, LOAD SWITCH WITH CURRENT LIMIT AND LDO
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Technical Specifications
Parameters and characteristics for this part
| Specification | TPS22949ADRGR |
|---|---|
| Current - Output (Max) [Max] | 100 mA |
| Fault Protection | Over Temperature, Current Limiting (Fixed) |
| Features | Auto Restart, Load Discharge |
| Input Type | Non-Inverting |
| Interface | On/Off |
| Mounting Type | Surface Mount |
| Number of Outputs | 2 |
| Operating Temperature [custom] | -40 °C, 105 °C |
| Output Configuration | High Side |
| Output Type | P-Channel |
| Package / Case | 8-WFDFN Exposed Pad |
| Ratio - Input:Output [custom] | 1:1 |
| Rds On (Typ) | 400 mOhm |
| Supplier Device Package | 8-SON (3x3) |
| Switch Type | General Purpose |
| Voltage - Load [Max] | 4.5 V |
| Voltage - Load [Min] | 1.62 V |
| Voltage - Supply (Vcc/Vdd) | False |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 3000 | $ 0.76 | |
| 6000 | $ 0.73 | |||
| Texas Instruments | LARGE T&R | 1 | $ 1.60 | |
| 100 | $ 1.09 | |||
| 250 | $ 0.84 | |||
| 1000 | $ 0.56 | |||
Description
General part information
TPS22949 Series
The TPS22949 and TPS22949A are devices that provide protection to systems and loads in high-current conditions. The device contains a 500-mΩ current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 4.5 V as well as a low-dropout (LDO) regulator with a fixed output voltage of 1.8 V.
The switch is controlled by an on/off input (EN1), which can interface directly with low-voltage control signals. When the switch current reaches the maximum limit, the TPS22949/TPS22949A operates in a constant-current mode to prohibit excessive currents from causing damage. If the constant current condition persists after 12 ms, these devices shut off the switch and pull the fault signal pin (OC) low. The TPS22949/TPS22949A has an auto-restart feature that turns the switch on again after 70 ms if the EN1 pin is still active.
The output of the current limiter is internally connected to an RF low-dropout (LDO) regulator that offers good AC performance with very low ground current, good power supply rejection ratio (PSRR), low noise, fast start-up, and excellent line and load transient response. The output of the regulator is stable with ceramic capacitors. This LDO uses a precision voltage reference and feedback loop to achieve overall accuracy of 2% over all load, line, process, and temperature variations.
Documents
Technical documentation and resources
