MIC2077

Features:

• 140m maximum on-resistance per channel
• 2.7V to 5.5V operating range
• 500mA minimum continuous current per channel
• Short-circuit protection with thermal shutdown
• Thermally isolated channels
• Fault status flag with 3ms filter
    eliminates false assertions
• Undervoltage lockout
• Reverse current flow blocking (no "body diode")
• Circuit breaker mode (MIC2077)
    reduces power consumption
• Logic-compatible inputs
• Soft-start circuit
• Low quiescent current
   Pin-compatible with MIC2524 and MIC2527


Application

• USB peripherals
• General purpose power switching
• ACPI power distribution
• Notebook PCs
• PDAs
• PC card hot swap


Pinout




Specifications

Supply Voltage (V_IN) ..................................... 0.3V to +6V
Fault Flag Voltage (V_FLG) ..............................................+6V
Fault Flag Current (I_FLG) ............................................25mA
Output Voltage (V_OUT) .................................................+6V
Output Current (I_OUT) ............................ Internally Limited
Enable Input (I_EN) ................................. 0.3V to VIN + 3V
Storage Temperature (T_S) ................. 65°C to +150 °C
Lead Temperature (soldering 5 sec.) ........................ 260°C
ESD Rating, Note 3 ...................................................... 1kV


Description

The MIC2027 and MIC2077 are quad high-side MOSFET switches optimized for general-purpose power distribution requiring circuit protection. The MIC2027/77 are internally current limited and have thermal shutdown that protects the device and load.

The MIC2077 offers "smart" thermal shutdown that reduces current consumption in fault modes. When a thermal shutdown fault occurs, the output is latched off until the faulty load is removed. Removing the load or toggling the enable input will reset the device output.

Both MIC2027 and MIC2077 employ soft-start circuitry that minimizes inrush current in applications where highly capacitive loads are employed.

A fault status output flag is asserted during overcurrent and thermal shutdown conditions. Transient current limit faults are internally filtered.

The MIC2027/77 is available in narrow (150 mil) and wide (300 mil) SOP (small outline packages).