MIC2090-1YM5-TR Microchip

MIC2090/MIC2091 Current Limiting Power Distribution Switches General Description Features The MIC2090 and MIC2091 are high-side MOSFET power 1.8V to 5.5V supply voltage switches optimized for general-purpose 50mA or 100mA 790 m typical R at 3.3V DSON low power distribution in circuits requiring over-current MIC2090 is rated for 50mA minimum continuous current limiting and circuit protection. Typical applications for these MIC2091 is rated for 100mA minimum continuous parts are for switching power in USB ports, portable current consumer items, camera and camcorder motor protection, thermal printer head protection, and many other low Reverse current blocking (OGI) current-load switching applications. 20ns super fast reaction time to hard short at output 10ms fault flag delay (t ) eliminates false D FAULT/ The MIC2090 and MIC2091 come in two versions: auto- assertions retry current limit and output latch off on an over current Auto-retry overcurrent and short-circuit protection (-1 fault. The MIC2090 and MIC2091 are offered in a space version) saving 5-pin SOT-23 package with an operating junction Latch-off on current limit (-2 version) temperature range of -40 C to +125 C. Thermal shutdown Fault status flag indicates: over-current, over- Data sheets and support documentation can be found on temperature, or UVLO Micrels web site at: www.micrel.com. Under-voltage lockout (UVLO) Low quiescent current Applications USB peripherals Camcorder DSC MP3/iPod SD protection USB low-power hub Typical Application MIC2091 USB Power Switch Startup into Short Circuit Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC2090/MIC2091 Ordering Information Current Current-Limit Junction Temperature Part Number Marking Package Limit Recovery Range MIC2090-1YM5 L1K 50mA Auto-Retry 40C to +125 C SOT-23-5 MIC2091-1YM5 M1K 100mA Auto-Retry 40C to +125 C SOT-23-5 MIC2090-2YM5 L2K 50mA Latch-Off 40C to +125 C SOT-23-5 MIC2091-2YM5 M2K 100mA Latch-Off 40C to +125 C SOT-23-5 Pin Configuration 5-Pin SOT-23 (M5) Pin Description Pin Number Pin Name Pin Function Supply (Input): +1.8V to +5.5V. Provides power to the output switch and the MIC2090/MIC2091 1 VIN internal control circuitry. 2 GND Ground. Enable (Input): Active-high TTL compatible control input. A high signal turns on the internal 3 EN switch and supplies power to the load. This pin cannot be left floating. Fault Status (Output): Open drain output. Can be connected to other open drain outputs. Must be pulled high with an external resistor. When EN=0, FAULT/ pin is high When EN=1, a low on the FAULT/ pin indicates one or more of the following conditions: 4 FAULT/ 1. The part is in current limit and is turned off. 2. The part is in thermal limit and is turned off. 3. The part is in UVLO Switched Output (Output): The voltage on this pin is controlled by the internal switch. Connect 5 VOUT the load driven by the MIC2090/MIC2091 to this pin. M9999-070611-B July 2011 2