MAX1823/MAX1823A/MAX1823B/MAX1823H 19-1903 Rev 3 10/03 Dual USB Switch with Fault Blanking and Autoreset General Description Features The MAX1823 is a dual, current-limited switch with Dual USB Switch in Tiny 10-Pin MAX Package autoreset specifically made for USB applications. The Autoreset Feature Saves Power autoreset feature latches the switch off if the output is Guaranteed 720mA Load per Channel shorted, saving system power. The switch reactivates when the short circuit is removed. Each channel is guar- Built-In 20ms Fault Blanking anteed to supply 720mA and meet USB specifications. Compliant to USB Specification Low quiescent supply current (50A) and standby current (3A) conserve battery power in portable applications. Blocks Reverse Current in Shutdown (MAX1823A/MAX1823B) The MAX1823 has multiple safety features to ensure that the USB port is protected. Built-in thermal-overload 4V to 5.5V Input Voltage Range protection limits power dissipation and junction temper- Independent Shutdown Control ature. Accurate internal current-limiting circuitry pro- (MAX1823/MAX1823AActive Low) tects the input supply against both overload and short-circuit conditions. Independent fault signals (MAX1823B/MAX1823HActive High) (FAULTA and FAULTB) notify the microprocessor (P) Independent FAULT Indicator Outputs when a thermal-overload, current-limit, undervoltage- Thermal-Overload Protection lockout (UVLO), or short-circuit fault occurs. A 20ms fault-blanking feature ignores momentary faults, such 50A Quiescent Current (Both Switches On) as those caused when hot swapping a capacitive load, 3A Standby Current preventing false alarms to the host system. The MAX1823A/MAX1823B also block reverse current (cur- UL Recognized rent from OUT to IN ) while in shutdown. The MAX1823 is available in a space-saving 10-pin Ordering Information MAX package. The MAX1823/MAX1823A are enabled with an active-low signal, and the MAX1823B/MAX1823H PART TEMP RANGE PIN-PACKAGE are enabled with an active-high signal. For a single ver- MAX1823EUB -40C to +85C 10 MAX sion of this device, refer to the MAX1946 data sheet. For a triple version, refer to the MAX1940 data sheet. MAX1823AEUB -40C to +85C 10 MAX MAX1823BEUB -40C to +85C 10 MAX MAX1823HEUB -40C to +85C 10 MAX Applications USB Ports and Hubs Notebook and Desktop Computers Typical Operating Circuit PDAs and Palmtop Computers Docking Stations USB INA OUTA PORT A IN INPUT INB 4V TO 5.5V Pin Configuration MAX1823 TOP VIEW MAX1823A *(ONA) ONA 1 10 FAULTA USB FAULTA OUTB PORT B INA 2 9 OUTA MAX1823 FAULTB IN 3 8 GND MAX1823A MAX1823B INB 4 7 OUTB ONA ONA MAX1823H *(ONB) ONB 5 6 FAULTB ONB ONB GND MAX *( ) ARE FOR MAX1823B/MAX1823H. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Dual USB Switch with Fault Blanking and Autoreset ABSOLUTE MAXIMUM RATINGS IN, INA, INB, ONA, ONB, ONA, ONB FAULTA, FAULTB Current .................................................20mA OUTA, OUTB to GND...........................................-0.3V to +6V Continuous Power Dissipation (T = +70C) A FAULTA, FAULTB to GND..........................-0.3V to (V + 0.3V) 10-Pin MAX (derate 5.6mW/C above +70C) ...........444mW IN MAX1823/MAX1823H, INA, IN to OUTA Operating Temperature Range ...........................-40C to +85C INB, IN to OUTB ...................................................-0.3V to +6V Junction Temperature......................................................+150C MAX1823A/MAX1823B, INA, IN to OUTA Storage Temperature Range .............................-65C to +150C INB, IN to OUTB (when disabled, Note 3)...............-6V to +6V Lead Temperature (soldering, 10s) .................................+300C INA, IN to OUTA INB, IN to OUTB (when enabled, Note 4)..............................-1.5A to +1.5A RMS 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 (Circuit of Figure 1, V = V = V = 5V, ONA = ONB = GND (MAX1823/MAX1823A), ONA = ONB = IN (MAX1823B/MAX1823H), IN INA INB T = 0C to +85C, unless otherwise noted. Typical values are at T = +25C.) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range 4.0 5.5 V T = +25C, each switch, A 75 105 MAX1823/MAX1823H T = +25C, each switch, A 90 120 MAX1823A/MAX1823B Switch On-Resistance R m ON T = 0C to +85C, each switch, A 135 MAX1823/MAX1823H T = 0C to +85C, each switch, A 165 MAX1823A/MAX1823B ON = IN (MAX1823/MAX1823A), ON = Standby Supply Current 310 A GND (MAX1823B/MAX1823H) I = I = 0A, one channel on 40 80 OUTA OUTB Quiescent Supply Current A I = I = 0A, both channels on 50 100 OUTA OUTB ON = IN ( MA X182 3/MAX 1823A), ON = GND (MAX 1823B/MA X1823H), V = V = 0V, 0.02 1.00 OUTA OUTB o T = +25 C A OUT Off-Leakage Current A ON = IN (MAX1823/MAX1823A), ON = GND (MAX1823B/MAX1823H), 0.02 10.00 o o V = V = 0V, T = 0 C to +85 C OUTA OUTB A Undervoltage-Lockout Threshold V Rising edge, 3% hysteresis 3.0 3.4 3.8 V UVLO Continuous Load Current 720 mA Continuous Current Limit I V - V = 0.5V 0.72 0.90 1.20 A LIM IN OUT V = 0V (I pulsing) 0.8 1.2 1.6 A OUT OUT PEAK Short-Circuit Current Limit I SHORT V = 0V (I pulsing) 0.35 A OUT OUT RMS 2 MAX1823/MAX1823A/MAX1823B/MAX1823H