TPS2556
TPS2556 is Precision Adjustable Current-Limited Power-Distribution Switches manufactured by Texas Instruments.
Features
- 1 Meets USB Current-Limiting Requirements
- Adjustable Current Limit, 500 m A 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-k V and 8-k V 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 m A 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
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Typical Application as USB Power Switch
2.5V
- 6.5V
R FAULT 100 kΩ
0.1 u F IN
Fault Signal
FAULT
OUT OUT
R ILIM ILIM
Control Signal
VOUT...
