MAX1558/MAX1558H 19-3128 Rev 2 3/08 Dual, 3mm x 3mm, 1.2A/Programmable-Current USB Switches with Autoreset General Description Features The MAX1558/MAX1558H are dual, current-limited 55m Switch Resistance switches with autoreset for USB applications. Autoreset Tiny 10-Pin, 3mm x 3mm TDFN Package latches the switch off if it is shorted for more than 20ms, saving system power. The shorted output is then tested 14% Accurate Current Limit to determine when the short is removed to automatically Autorestart when Fault is Removed restart the channel. Each channel delivers up to 1.2A and meets all IEC specifications for USB ports. Low Programmable Current Up to 1.2A quiescent supply current (45A) and standby current Thermal-Overload Protection (3A) conserve battery power in portable applications. The MAX1558/MAX1558H safety features ensure that the Built-In 20ms Fault Blanking USB port is protected. Built-in thermal-overload protection Compliant to All USB Specifications limits power dissipation and junction temperature. Accurate, programmable current-limiting circuitry pro- 2.7V to 5.5V Supply Range tects the input supply against both overload and short-cir- Independent-Output Fault Indicators cuit conditions. 20ms fault blanking enables the circuit to ignore transient faults, such as those caused when hot Block Reverse Current when Disabled swapping a capacitive load, preventing false alarms to 15kV ESD Protection (with Capacitor) the host system. The MAX1558/MAX1558H also feature reverse-current protection circuitry to block current flow UL Recognized: UL E211395 from the output to the input when the switches are off. The MAX1558/MAX1558H are available in space-sav- Ordering Information ing 3mm x 3mm, 10-pin TDFN packages. The MAX1558 is enabled with an active-low signal, and the PIN- TOP PART TEMP RANGE MAX1558H is enabled with an active-high signal. PACKAGE MARK 10 TDFN MAX1558ETB+ -40C to +85C AAR (3mm x 3mm) Applications 10 TDFN MAX1558HETB+ -40C to +85C AAS USB Ports and Hubs (3mm x 3mm) Notebook Computers and Desktops +Denotes a lead-free package. PDAs and Palmtop Computers Typical Operating Circuit Docking Stations Pin Configuration INA ONA ONA INPUT ONB ONB INB TOP VIEW 2.7V TO 5.5V USB OUTA 10 98 76 PORT A MAX1558 FLTA MAX1558 USB OUTB PORT B (MAX1558H) FLTB + 1 23 45 ISET GND TDFN 3mm x 3mm Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim s website at www.maxim-ic.com. INA OUTA ONA (ONA) FLTA ISET GND ONB (ONB) FLTB INB OUTBDual, 3mm x 3mm, 1.2A/Programmable-Current USB Switches with Autoreset ABSOLUTE MAXIMUM RATINGS Continuous Power Dissipation (T = +70C) IN , ON , OUT , ISET, FLT to GND........................-0.3V to +6V A 10-Pin TDFN 3mm x 3mm IN to OUT (when disabled) (Note 1)........................-6V to +6V IN to OUT (when enabled) (Note 2)............-1.6A to +1.6A (derate 24.4mW/C above +70C).............................1952mW RMS Operating Temperature Range ...........................-40C to +85C FLT Sink Current................................................................20mA Junction Temperature......................................................+160C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Note 1: Reverse current (current from OUT to IN ) is blocked when disabled. Note 2: Forward current (current from IN to OUT ) is internally limited. Reverse current, from OUT to IN , is not limited when the device is enabled and must be kept below 1.5A to prevent permanent device damage. When the MAX1558/MAX1558H RMS are disabled, the switch turns off and reverse current is internally blocked. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = V = 5V, V = V = 0V (MAX1558), V = V = 5V (MAX1558H), R = 26k to GND, T = 0C to +85C, INA INB ONA ONB ONA ONB ISET A unless otherwise noted. Typical values are at T = +25C.) (Note 3) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range 2.75 5.50 V V = 5V, T = +25C5575 IN A Switch On-Resistance R V = 3.3V, T = +25C64 m ON IN A V = 4.4V, T = 0C to +85C 105 IN A Standby Supply Current Both switches disabled 3 6 A Quiescent Supply Current Both switches enabled 45 75 A V = V = 0V 0.03 10 OUTA OUTB OUT Off-Leakage Current Switches disabled A V = V = 5V 0.03 OUTA OUTB V = 0V, V = V = 5V, both IN OUTA OUTB Reverse Leakage Current 0.03 A switches disabled Undervoltage-Lockout Threshold V Rising edge, 3% hysteresis 2.3 2.5 2.7 V UVLO Continuous Load Current R = 26k 1.2 A ISET R = 26k 1.20 1.4 1.60 ISET V - V = IN OUT Current-Limit Threshold R = 39k 0.80 0.925 1.05 A ISET 0.5V R = 60k 0.50 0.6 0.70 ISET R = 26k 1.45 2.0 2.60 ISET V = 0V OUT Peak Short-Circuit Current Limit I R = 39k 1.40 A SHORT ISET (PEAK) (I pulsing) OUT R = 60k 0.90 ISET R = 26k 0.55 ISET V = 0V OUT RMS Short-Circuit Current Limit I R = 39k 0.37 A SHORT ISET RMS (I pulsing) OUT R = 60k 0.23 ISET Short-Circuit Continuous Current- (Note 4) 1 V Limit Transition Threshold Fault-Blanking Timeout Period From I condition to 50% of V 820 40 ms LIMIT FLT R = 10, C = 1F, does not OUT OUT Turn-On Delay t include rise time (from ON asserted to 0.5 1.4 4.0 ms ON V = 10% V ) OUT IN 2 MAX1558/MAX1558H