TPS2561DRCR.B中文资料德州仪器数据手册PDF规格书

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 dualchannel

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.