Product Summary

The MC33291LEG is an eight-output, low-side power switch with 8-bit serial input control. The MC33291LEG is a versatile circuit designed for automotive applications, but is well suited for other environments. The MC33291LEG incorporates SMARTMOS technology, with CMOS logic, bipolar/MOS analog circuitry, and DMOS power MOSFETs. The MC33291LEG interfaces directly with a microcontroller to control various inductive or incandescent loads. The circuit’s innovative monitoring and protection features include very low standby current, SPI cascade fault reporting capability, internal 53 V clamp on each output, output-specific diagnostics, and independent shutdown of outputs.

Parametrics

MC33291LEG absolute maximum ratings: (1)Power Supply Voltage, Normal Operation (Steady-State), VPWR(SUS): -1.5 to 26.5V; Transient Conditions, VPWR(PK): -13 to 60V; (2)Logic Supply Voltage, VDD: -0.3 to 7.0V; (3)Input Pin Voltage, VIN: -0.3 to 7.0V; (4)Output Clamp Voltage, 5.0 mA ≤ IOUT ≤ 0.5 A, VOUT(OFF): 45 to 65V; (5)Output Self-Limit Current, IOUT(LIM): 1.0 to 3.0A; (6)Continuous Per Output Current, IOUT(CONT): 500mA; (7)ESD Voltage, Human Body Model, VESD1: ±2000V; Machine Model; (8)VESD2: ±200V; (9)Output Clamp Energy, ECLAMP: 50mJ; (10)Recommended Frequency of SPI Operation, fSPI: 3.0MHz; (11)Storage Temperature, TSTG: -55 to 150℃; (12)Operating Case Temperature, TC: -40 to 125℃; (13)Operating Junction Temperature, TJ: -40 to 150℃; (14)Power Dissipation (TA = 25℃), PD: 2.0W.

Features

MC33291LEG features: (1)Designed to Operate Over Wide Supply Voltages of 5.5 V to 26.5 V; (2)Interfaces to Microprocessor Using 8-Bit SPI I/O Protocol up to 3.0 MHz; (3)1.0A Peak Current Outputs with Maximum RDS(ON) of 1.6Ω at TJ - 150℃; (4)Outputs Current-Limited to Accommodate In-Rush Currents Associated with Switching Incandescent Loads; (5)Output Voltages Clamped to 53 V During Inductive Switching; (6)Maximum Sleep Current (IPWR) of 25μA; (7)Maximum of 4.0 mA IDD During Operation; (8)Pb-Free Packaging Designated by Suffix Code EG.

Diagrams

MC33291LEG block diagram