描述 Description

The uP7537 is a current limited, dual-input triple-outputpower multiplexer acting as a high side switch for USBapplications where heavy capacitive loads and short-circuitsare likely to be encountered. It switches output voltages to5VSB at S3/S4/S5 states with typical 400mΩ switchesand 200mA capacity; to 5VCC at S0/S1/S2 states withtypical 80mΩ switches and 1.2A capacity. The outputs canbe parallelled to provide totally 3.0A output current at S0/S1/S2 states.

Optimal switch logic according to S3# and 5VCC statusensures seamless output voltage transition.

When the output load exceeds the current-limit thresholdor a short is present, the uP7537 asserts over currentprotection and limits the output current to a safe level bydriving the power switches into saturation mode.

Other features include soft-start to limit inrush currentduring plug-in, thermal shutdown to prevent catastrophicswitch failure from high-current loads, under-voltage lockout(UVLO) to ensure that the device remains off unless thereis a valid input voltage present. The uP7537 is available inPSOP-8L package.

特性 Features

? Compliant to USB Specifications.
? Operating Range: 4.5 V to 5.5 V.
? Output Voltage Switch to 5VSB at S3/S4/S5
? 200mA Continuous Load Current.
? Typical 400mΩ High Side Switch.

? Output Voltage Switch to 5VCC at S0/S1/S2
? 1.2A Continuous Load Current.
? Typical 80mΩ High Side Switch.

? Low Quiescent Current: 100uA Typical.
? Slow Turn On and Fast Turn Off.
? Enable Active-High.
? UL Approved : E338429.
? TuV EN60950-1 Certification.
? CB IEC60950-1 Certification.
? RoHS Compliant and Halogen Free.

應用 Application

? Notebook and Desktop PCs.
? USB Power Management.
? ACPI Power Distribution.
? Hot-Plug Power Supplies.