Document Number: MC33984
Rev. 9.0, 1/2007
Freescale Semiconductor
Advance Information
Dual Intelligent High-Current
Self-Protected Silicon
33984B
High-Side Switch (4.0 mΩ)
The 33984 is a dual self-protected 4.0 mΩ silicon switch used to
replace electromechanical relays, fuses, and discrete devices in
power management applications. The 33984 is designed for harsh
environments, and it includes self-recovery features. The device is
suitable for loads with high inrush current, as well as motors and all
types of resistive and inductive loads.
HIGH-SIDE SWITCH
Programming, control, and diagnostics are implemented via the
Serial Peripheral Interface (SPI). A dedicated parallel input is
available for alternate and pulse-width modulation (PWM) control of
each output. SPI-programmable fault trip thresholds allow the device
to be adjusted for optimal performance in the application.
BOTTOM VIEW
The 33984 is packaged in a power-enhanced 12 x 12 nonleaded
PQFN package with exposed tabs.
PNA SUFFIX
98ARL10521D
16-PIN PQFN
Features
• Dual 4.0 mΩ Max High-Side Switch with Parallel Input or SPI
Control
• 6.0 V to 27 V Operating Voltage with Standby Currents < 5.0 µA
• Output Current Monitoring with Two SPI-Selectable Current Ratios
• SPI Control of Overcurrent Limit, Overcurrent Fault Blanking Time,
Output-OFF Open Load Detection, Output ON/OFF Control,
Watchdog Timeout, Slew Rates, and Fault Status Reporting
• SPI Status Reporting of Overcurrent, Open and Shorted Loads,
Overtemperature, Undervoltage and Overvoltage Shutdown, Fail-
Safe Pin Status, and Program Status
ORDERING INFORMATION
Temperature
Package
Device
Range (T )
A
MC33984BPNA/R2 -40°C to 125°C
16 PQFN
• Enhanced -16 V Reverse Polarity VPWR Protection
VDD
VDD
VDD
VPWR
33984B
VDD
FS
VPWR
GND
I/O
I/O
WAKE
HS1
HS0
SI
SO
SCLK
CS
SCLK
CS
MCU
SO
SI
LOAD
RST
INO
IN1
I/O
I/O
I/O
LOAD
CSNS
FSI
A/D
GND
Figure 1. 33984 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.