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MAX1558ETB Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1558ETB Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 12 page General Description The MAX1558/MAX1558H are dual, current-limited switches with autoreset for USB applications. Autoreset latches the switch off if it is shorted for more than 20ms, saving system power. The shorted output is then tested to determine when the short is removed to automatically restart the channel. Each channel delivers up to 1.2A and meets all IEC specifications for USB ports. Low quiescent supply current (45µA) and standby current (3µA) conserve battery power in portable applications. The MAX1558/MAX1558H safety features ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperature. Accurate, programmable current-limiting circuitry pro- tects the input supply against both overload and short-cir- cuit conditions. 20ms fault blanking enables the circuit to ignore transient faults, such as those caused when hot swapping a capacitive load, preventing false alarms to the host system. The MAX1558/MAX1558H also feature reverse-current protection circuitry to block current flow from the output to the input when the switches are off. The MAX1558/MAX1558H are available in space-sav- ing 3mm x 3mm, 10-pin TDFN packages. The MAX1558 is enabled with an active-low signal, and the MAX1558H is enabled with an active-high signal. Applications USB Ports and Hubs Notebook Computers and Desktops PDAs and Palmtop Computers Docking Stations Features ♦ 55mΩ Switch Resistance ♦ Tiny 10-Pin, 3mm x 3mm TDFN Package ♦ 14% Accurate Current Limit ♦ Autorestart when Fault is Removed ♦ Programmable Current Up to 1.2A ♦ Thermal-Overload Protection ♦ Built-In 20ms Fault Blanking ♦ Compliant to All USB Specifications ♦ 2.7V to 5.5V Supply Range ♦ Independent-Output Fault Indicators ♦ Block Reverse Current when Disabled ♦ 15kV ESD Protection (with Capacitor) ♦ UL Listing Pending Dual, 3mm x 3mm, 1.2A/Programmable-Current USB Switches with Autoreset ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 19-3128; Rev 0; 6/04 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. PART TEMP RANGE PIN- PACKAGE TOP MARK MAX1558ETB -40 °C to +85°C 10 TDFN (3mm x 3mm) AAR MAX1558HETB -40 °C to +85°C 10 TDFN (3mm x 3mm) AAS MAX1558 INPUT 2.7V TO 5.5V INA INB ISET FLTA FLTB ONA ONB ONA ONB OUTA OUTB GND USB PORT A USB PORT B Typical Operating Circuit 2 3 9 8 TDFN 3mm x 3mm TOP VIEW 4 5 7 6 1 MAX1558 (MAX1558H) 10 ISET INA INB ONA (ONA) ONB (ONB) OUTA GND OUTB FLTA FLTB Pin Configuration |
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