MAX4914B/MAX4915A/B/ 100mA/200mA/300mA Current-Limit Switches MAX4917A/B with Low Shutdown Reverse Current General Description Benefits and Features The MAX4914B/MAX4915A/B/MAX4917A/B family of Guaranteed Current Limit: 100mA, 200mA, 300mA switches feature internal current limiting to prevent Thermal-Shutdown Protection damage to host devices due to faulty load conditions. Reverse Current Protection These analog switches have a low 0.2 on-resistance and operate from a 2.3V to 5.5V input voltage range. 0.2 On-Resistance They are available with guaranteed 100mA, 200mA, and 14ms Guaranteed Blanking Time 300mA current limits, making them ideal for SDIO and FLAG Function other load switching applications. 80A Supply Current When the switch is on and a load is connected to the 8A Latchoff Current port, a guaranteed blanking time of 14ms ensures that (MAX4914B/MAX4915B/MAX4917B) the transient voltages settle down. If after this blanking time the load current is greater than the current limit, Autoretry (MAX4915A/MAX4917A) the MAX4914B/MAX4915B/MAX4917B latchoff versions 0.01A Shutdown Current enter a latchoff state where the switch is turned off and 2.3V to 5.5V Supply Range FLAG is issued to the microprocessor. The switch can be turned on again by cycling the power or the ON pin. Undervoltage Lockout The MAX4915A/MAX4917A have an autoretry feature Fast Current-Limit Response Time (5s) where the switch turns off after the blanking time and Low (0.1A typ) Reverse Shutdown Current then continuously checks to see if the overload condition Tiny 6-Pin DFN (2mm x 2mm) and 5-Pin SOT23 is present. The switch turns on and remains on after the Packages overload condition disappears and FLAG deasserts. The MAX4914B is available in the tiny 6-pin DFN Applications (2mm x 2mm) package, while the MAX4915A/B and PDAs and Palmtop Devices MAX4917A/B are available in both 6-pin DFN (2mm x Cell Phones 2mm) and space-saving 5-pin SOT23 packages. These GPS Systems devices operate over the -40C to +85C extended Handheld Devices temperature range. SDIO Typical Operating Circuit appear at end of data sheet. end USB Ports of data sheet. Notebook Computers 19-0544 Rev 3 1/16MAX4914B/MAX4915A/B/ 100mA/200mA/300mA Current-Limit Switches MAX4917A/B with Low Shutdown Reverse Current Absolute Maximum Ratings IN, ON, FLAG, OUT to GND .....................................-0.3V to +6V Operating Temperature Range ........................... -40C to +85C OUT Short Circuit to GND .................................Internally Limited Junction Temperature ......................................................+150C Continuous Power Dissipation (T = +70C) Storage Temperature Range ............................ -65C to +150C A 5-Pin SOT23 (derate 7.1mW/C above +70C) ..........571mW Lead Temperature (soldering, 10s) .................................+300C 6-Pin DFN (derate 4.5mW/C above +70C) ............358mW 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 = +2.3V to +5.5V, T = -40C to +85C, unless otherwise noted. Typical values are at V = +3.3V, T = +25C.) (Note 1) IN A IN A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Voltage V 2.3 5.5 V IN V = +2.3V to +5.0V 80 120 IN V = V , I = 0, ON IN OUT Quiescent Current I A Q switch on V = +5.0V to +5.5V 160 IN V = V , after an overcurrent fault ON IN Latchoff Current (Note 2) I MAX4914B/MAX4915B/MAX4917B 8 17 A LATCH (latchoff versions) Forward Shutdown Current I V = 0, V = 0, V = +5.5V 0.01 1 A SHDN ON OUT IN Reverse Shutdown Current I V = 0, V = +5.5V, V = +2.3V 0.01 1 A SHDN ON OUT IN MAX4914B, V = GND 100 150 OUT Forward Current Limit I MAX4915 , V = GND 200 300 mA FWD OUT MAX4917 , V = GND 300 450 OUT MAX4914B, V - V 0.5V 150 OUT IN Reverse Current Limit I MAX4915 , V - V 0.5V 300 mA REV OUT IN MAX4917 , V - V 0.5V 450 OUT IN ON Input Leakage V = V or GND -1 +1 A ON IN Undervoltage Lockout UVLO Rising edge 1.75 2.25 V Undervoltage-Lockout Hysteresis 100 mV T = +25C, I = 95mA 0.2 0.4 A OUT On-Resistance R ON T = -40C to +85C, I = 95mA 0.5 A OUT MAX4914B/MAX4915B/MAX4917B 2.0 ON Input Logic-High Voltage V V IH MAX4915A/MAX4917A 1.4 MAX4914B/MAX4915B/MAX4917B 0.8 ON Input Logic-Low Voltage V V IL MAX4915A/MAX4917A 0.4 FLAG Output Logic-Low Voltage I = 1mA 0.4 V SINK FLAG Output-High Leakage V = V = V = +5.5V 1 A ON IN FLAG Current Thermal Shutdown +150 C Thermal-Shutdown Hysteresis 15 C Maxim Integrated 2 www.maximintegrated.com