MIC2074-1YM Microchip

MIC2073/2074 Dual-Channel Power Distribution Switch General Description Features 115 m typical RB at 5.0 V The MIC2073/2074 are high-side MOSFET switches DS(ON) optimized for general-purpose power distribution requiring 210 m maximum RB at 5.0 V DS(ON) circuit protection. 2.7 V to 5.5 V operating range The MIC2073/2074 are internally current limited and have 500 mA minimum continuous current per channel thermal shutdown for protecting the device and load. Short circuit protection with thermal shutdown The MIC2074 offers smart shutdown that reduces current Thermally isolated channels consumption in fault mode. When a fault occurs due to Fault status flag (FLGA/B) separate for each channel thermal shutdown, the output is latched off. The MIC2074s output will be reset, enabling the output, either 3ms fault flag delay (T ) eliminates false assertions D by removing the load or toggling the ENABLE pin. UVLO (Undervoltage Lockout) Both devices employ soft-start circuitry that minimizes Reverse current flow blocking (no body diode) inrush current in applications where highly capacitive loads Circuit breaker mode (MIC2074) are employed. Logic-compatible inputs A fault status output flag is asserted during overcurrent or Soft-start circuit thermal shutdown conditions. Transient faults are internally Low quiescent current filtered. Pin compatible with the MIC2026/2076 The MIC2073/2074 are available in an 8-pin SOIC. All support documentation can be found on Micrels web Applications site at: www.micrel.com. USB peripherals General purpose power switching ACPI power distribution Notebook PCs PDAs PC card hot swap Typical Application V CC V 2.7V to 5.5V CONT. 10k 10k Logic Controller MIC2073/74 VIN ON/OFF Load ENA OUTA OVERCURRENT FLGA IN 0.1F OVERCURRENT FLGB GND ON/OFF ENB OUTB Load Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC2073/2074 Ordering Information Part Number Enable Package MIC2073-1YM Active High MIC2073-2YM Active Low 8- Pin SOIC MIC2074-1YM Active High MIC2074-2YM Active Low NOTE: 1. MIC2073/2074 are Temperature rated from 40C to +85C 2. MIC2073/2074 are all lead free Pin Configuration ENA 1 8OUTA FLGA 2 7 IN FLGB GND 3 6 ENB 4 5 OUTB 8-Pin SOIC (M) MIC2073/2074 Pin Description Pin Number Pin Name Pin Function Switch A Enable (Input): Logic-compatible, enable input. Active high (-1) or 1 ENA active low (-2). Fault Flag A (Output): Active-low, open-drain output. Low indicates overcurrent or thermal shutdown conditions. Overcurrent conditions must last longer than tB B D 2 FLGA in order to assert FLGA. FLGA pin can be left floating however, fault status information will not be available. Fault Flag B (Output): Active-low, open-drain output. Low indicates overcurrent or thermal shutdown conditions. Overcurrent conditions must last longer than tB B D 3 FLGB in order to assert FLGB. FLGB pin can be left floating however, fault status information will not be available. Switch B Enable (Input): Logic-compatible enable input. Active-high (-1) or 4 ENB active-low (-2). 5 OUTB Switch B (Output) 6 GND Ground 7 IN Input: Switch and logic supply input. 8 OUTA Switch A (Output) January 2009 M9999-011209 2