uP7550

1

uP7550-DS-F0002, July 2013

www.upi-semi.com

Power Multiplexer for USB High Side Switch

Compliant to USB Specifications

Operating Range: 4.5 V to 5.5 V

Output Voltage Switch to 5VSB at S3/S4/S5

1A Continuous Load Current

400m

Ω

Ω

Ω

Ω

Ω High Side Switch

Output Voltage Switch to 5VCC at S0/S1/S2

1.8A Continuous Load Current

80m

Ω

Ω

Ω

Ω

Ω High Side Switch

Low Quiescent Current: 50uA Typical

Low Standby Current: Less Than 1uA

Slow Turn On and Fast Turn Off

Enable Active-High

UL Approved: E316940

TuV EN60950-1 Certification

CB IEC60950-1 Certificatioon

RoHS Compliant and Halogen Free

The uP7550 is a current limited power multiplexer acting

as a high side switch for USB applications where heavy

capacitive loads and short-circuits are likely to be

encountered. It switches output voltage to 5VSB at S3/

S4/S5 states with 400m

Ω switch and 1A capacity; to 5VCC

at S0/S1/S2 states with 80m

Ω switch and 1.8A capacity.

This device features an active-high enable control input.

Soft start function limits the inrush current from supply

input when enabled. Disabling the device reduces its

standby current down to less than 1uA.

Optimal switch logic according to S3# and 5VCC status

ensures seamless output voltage transition.

When the output load exceeds the current-limit threshold

or a short is present, the uP7550 asserts over current

protection and limits the output current to a safe level by

driving the power switches into saturation mode.

Other features include soft-start to limit inrush current

during plug-in, thermal shutdown to prevent catastrophic

switch failure from high-current loads, under-voltage lockout

(UVLO) to ensure that the device remains off unless there

is a valid input voltage present. The uP7550 is available in

SOT23-8L package.

Notebook and Desktop PCs

USB Power Management

ACPI Power Distribution

Hot-Plug Power Supplies

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General Description

Applications

Ordering Information

Features

RoHS compliant and 100% matte tin (Sn) plating that are

suitable for use in SnPb or Pb-free soldering processes.