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MAX1562HESA Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1562HESA Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 12 page General Description The MAX1562/MAX1562H/MAX1563 single current- limited switches provide up to 4A to power up to eight USB ports. They operate from a 4V to 5.5V input supply and consume only 40µA of quiescent current when operating and only 3µA in shutdown. The MAX1562/MAX1562H/MAX1563s’ autoreset feature latches the switch off if the output is shorted, thereby saving system power. When the short is removed, the switch is reactivated. A fault-blanking feature enables the circuit to ignore momentary faults, such as those caused when hot swapping a capacitive load, preventing false alarms to the host system. Fault blanking also prevents fault signals from being issued when the device powers up the load. The MAX1562/MAX1562H/MAX1563 provide several safety features to protect the USB port. Built-in thermal- overload protection turns off the switch when the die temperature exceeds +160°C. Accurate internal cur- rent-limiting circuitry protects the input supply against both overload and short-circuit conditions. An open- drain fault signal (FAULT) notifies the microprocessor when a thermal-overload, current-limit, undervoltage lockout (UVLO), or short-circuit fault occurs. The MAX1562 has an active-low ON, and the MAX1562H has an active-high ON enable input. The MAX1563 has a selectable active-high or active-low logic-controlled enable. The current limit is pro- grammed from 1A to 4A using a resistor. The MAX1562/MAX1562H are available in 8-pin SO packages and are pin-compatible upgrades to the MIC2545A/MIC2549A. The MAX1563 provides the same features and higher current performance in a smaller 12-pin (4mm x 4mm) QFN package. These devices operate over an extended temperature range (-40°C to +85°C). An evaluation kit is available to speed designs. Applications Notebook Computers Desktop Computers USB Ports and Hubs PDAs and Palmtop Computers Docking Stations Features o Programmable Current Limit (1A to 4A) with Resistor o Autoreset Feature Saves System Power o 20ms Fault-Blanking Circuitry o Active-High/Low Control Logic o Fault-Indicator Output o Thermal-Overload Protection o Smaller 4mm x 4mm QFN Package (MAX1563) o 3µA Shutdown Current o UL Certification Pending Programmable 4A USB Current-Limited Switches with Autoreset and Fault Blanking ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 19-2631; Rev 0; 7/03 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. EVALUATION KIT AVAILABLE Pin Configurations appear at end of data sheet. PART TEMP RANGE PIN-PACKAGE MAX1562ESA -40°C to +85°C 8 SO MAX1562HESA -40°C to +85°C 8 SO MAX1563ETC -40°C to +85°C 12 QFN 4mm x 4mm MAX1562 MAX1562H MAX1563 FAULT OUT OUT ISET SEL ON IN IN USB PORT GND INPUT 4V TO 5.5V MAX1563 ONLY ACTIVE-HIGH/ACTIVE-LOW SELECTABLE Typical Operating Circuit |
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