SLVS931B November 2009 – December 2016 TPS2556 , TPS2557
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Parameter Measurement Information
- 9 Detailed Description
-
10Application and Implementation
- 10.1 Application Information
- 10.2
Typical Applications
- 10.2.1 Current-Limiting Power-Distribution Switch
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
- DRB|8
Thermal pad, mechanical data (Package|Pins)
- DRB|8
Orderable Information
1 Features
- Meets USB Current-Limiting Requirements
- Adjustable Current Limit, 500 mA to 5 A (Typical)
- ±6.5% Current-Limit Accuracy at 4.5 A
- Fast Overcurrent Response: 3.5-µs (Typical)
- 22-mΩ High-Side MOSFET
- Operating Voltage: 2.5 V to 6.5 V
- 2-µA Maximum Standby Supply Current
- Built-in Soft Start
- 15-kV and 8-kV System-Level ESD Capable
- UL Listed: File No. E169910 and CB IEC60950-1-am2 ed2.0
2 Applications
- USB Ports and Hubs
- Digital TVs
- Set-Top Boxes
- VOIP Phones
3 Description
The TPS255x power-distribution switch is 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 500 mA and 5 A (typical) through an external resistor. 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 switching into a constant-current mode when the output load exceeds the current-limit threshold. The FAULT logic output asserts low during overcurrent and overtemperature conditions.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS2556, TPS2557 | VSON (8) | 3.00 mm × 3.00 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
Typical Application as USB Power Switch
