33291_08 Datasheet, PDF (1/27 Pages) Freescale Semiconductor, Inc – Eight-Output Switch with Serial Peripheral Interface I/O

Freescale Semiconductor
Technical Data
Eight-Output Switch with Serial
Peripheral Interface I/O
Document Number: MC33291
Rev 5, 07/2008
33291
The 33291 device is an eight-output, low-side power switch with 8-
bit serial input control. The 33291 is a versatile circuit designed for
automotive applications, but is well suited for other environments. The
33291 incorporates SMARTMOS technology, with CMOS logic,
bipolar/MOS analog circuitry, and DMOS power MOSFETs. The 33291
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.
The device is parametrically specified over an ambient temperature
range of -40°C ≤ T_A ≤ 125°C and 9.0 V ≤ V_PWR ≤ 16 V supply.
Features
• Designed to Operate Over Wide Supply Voltages of 5.5 V to 26.5 V
• Interfaces to Microprocessor Using 8-Bit SPI I/O Protocol up to 3.0
MHz
• 1.0 A Peak Current Outputs with Maximum R_DS(ON) of 1.6 Ω at T_J -
150°C
• Outputs Current-Limited to Accommodate In-Rush Currents
Associated with Switching Incandescent Loads
• Output Voltages Clamped to 53 V During Inductive Switching
• Maximum Sleep Current (I_PWR) of 25 μA
• Maximum of 4.0 mA I_DD During Operation
• Pb-Free Packaging Designated by Suffix Code EG
LOW-SIDE SWITCH
DW SUFFIX
EG SUFFIX (PB-FREE)
98ASB42344B
24-PIN SOICW
ORDERING INFORMATION
Device
Temperature
Range (T_A)
Package
MC33291DW/R2
MCZ33291EG/R2
-40°C to 125°C
24 SOICW
VDD
MCU
33291
VPWR OP 0
SFPD
OP 1
VDD
OP 2
CS
OP 3
SCLK
OP 4
SI
OP 5
SO
OP 6
RESET ^{OP 7}
GND
V _PWR
Figure 1. 33291 Simplified Application Schematic
Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as
may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2008. All rights reserved.