TPS256x Dual Channel Precision Adjustable Current-limited Power Switches
1 Features
- Two separate current limiting channels
- Meets USB current-limiting requirements
- Adjustable current limit: 250 mA to 2.8 A (typ)
- ± 7.5% current-limit accuracy at 2.8 A
- Fast overcurrent response: 3.5 μs (typ)
- Two 44-mΩ high-side MOSFETs
- Operating range: 2.5 V to 6.5 V
- 2-μA maximum standby supply current
- Built-in soft-start
- 15-kV, 8-kV system-level ESD capable
- UL listed: file no. E169910
- CB and Nemko certified
2 Applications
- USB ports, hubs
- Digital TVs
- Set-top boxes
- VOIP phones
3 Description
The TPS2560 and TPS2561 (TPS256x) are dual-channel power-distribution switches intended for applications where precision current limiting is required or heavy capacitive loads and short circuits are encountered. These devices offer a programmable current-limit threshold between 250 mA and 2.8 A (typ) per channel through an external resistor. The power-switch rise and fall times are controlled to minimize current surges during turn on and off.
Each channel of the TPS256x devices limit the output current to a safe level by switching into a constant-current mode when the output load exceeds the current-limit threshold. The FAULTx logic output for each channel independently asserts low during overcurrent and overtemperature conditions.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS2560, TPS2561 | VSON (10) | 3.00 mm × 3.00 mm |
Typical Application Diagram