The TPS255x and TPS255x-1 power-distribution switches are intended for applications where precision current limiting is required or heavy capacitive loads and short circuits are encountered and provide up to 1.5 A of continuous load current. These devices offer a programmable current-limit threshold between 75 mA and 1.7 A (typical) through an external resistor. Current-limit accuracy as tight as ±6% can be achieved at the higher current-limit settings. The power-switch rise and fall times are controlled to minimize current surges during turnon and turnoff.
TPS255x devices limit the output current to a safe level by using a constant-current mode when the output load exceeds the current-limit threshold. TPS255x-1 devices provide circuit breaker functionality by latching off the power switch during overcurrent or reverse-voltage situations. An internal reverse-voltage comparator disables the power-switch when the output voltage is driven higher than the input to protect devices on the input side of the switch. The FAULT output asserts low during overcurrent and reverse-voltage conditions.
| Part number | Order | Vin (Min) (V) | Vin (Max) (V) | Continuous current (Max) (A) | Current limit (A) | Enable | Number of switches | Rating |
|---|---|---|---|---|---|---|---|---|
| TPS2552 |
|
2.5 | 6.5 | 1.5 | 0.075 to 1.7 | Active Low | 1 | Catalog |
| TPS2552-1 |
|
2.5 | 6.5 | 1.5 | 0.075 to 1.7 | Active Low | 1 | Catalog |
| TPS2553 |
|
2.5 | 6.5 | 1.5 | 0.075 to 1.7 | Active High | 1 | Catalog |
| TPS2553-1 |
|
2.5 | 6.5 | 1.5 | 0.075 to 1.7 | Active High | 1 | Catalog |
