MC33291

The MC33291 is an eight output low side power switch with 8bit serial input control. The MC33291 is a versatile circuit designed for automotive applications, but is well suited for other environments. The MC33291 incorporates SMARTMOSE technology, with CMOS logic, bipolar/MOS analog circuitry, and DMOS power MOSFETs. The MC33291 interfaces directly with a microcontroller to control various inductive or incandescent loads. The circuit's innovative monitoring and protection features are: very low standby current, SPI cascadable fault reporting, internal 53 V clamp on each output, output specific diagnostics, and independent shutdown of outputs. The device is parametrically specified over an ambient temperature range of 40 3 T_A 3 125 and 9.0 V 3 V_PWR 3 16 V supply. The economical SO24 wide body surface mount plastic packages make the MC33291 a very cost effective solution for many applications.
• Designed to Operate Over Wide Supply Voltages of 5.5 to 26.5 V
• Interfaces Directly with Microprocessor Using 8Bit SPI I/O Protocol to 3.0 MHz
• 1.0 A Peak Current Outputs with Maximum R_DS(on) of 1.2 W at T_J = 150
• Outputs Current Limited to 1.0 to 3.0 A for Switching Incandescent Loads
• Output Voltages Clamped to 53 V During Inductive Switching
• Maximum Sleep Current (I_PWR) of 25 mA with Reset Low
• Maximum of 4.0 mA I_DD During Operation
• Maximum of 2.0 mA I_PWR During Operation with All Outputs ON
• Open Load Detection (Outputs OFF)
• Overvoltage Detection and Shutdown
• Outputs have Independent Over Temperature Detection and Shutdown
• Output Mode Programmable for Sustained Current Limit or Shutdown
• Independent Output Short Circuit Detect and LatchOff for Every Write Cycle
• Designed for 40 to 125 Ambient Temperature Operation