33988 Datasheet, PDF (1/34 Pages) Freescale Semiconductor, Inc – Dual Intelligent High-current Self-protected Silicon High Side Switch (8.0mΩ)

Freescale Semiconductor
Advance Information
Document Number: MC33988
Rev. 4.0, 11/2009
Dual Intelligent High-current
Self-protected Silicon High Side
Switch (8.0mΩ)
The 33988 is a dual self-protected 8.0mΩ silicon switch used to
replace electromechanical relays, fuses, and discrete devices in
power management applications. The 33988 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.
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.
The 33988 is packaged in a power-enhanced 12 x 12 nonleaded
PQFN package with exposed tabs.
Features
• Dual 8.0mΩ max high side switch with parallel input or SPI control
• 6.0V to 27V operating voltage with standby currents < 5.0μA
• Output current monitoring with two SPI-selectable current ratios
• SPI control of over-current limit, over-current 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, over-
temperature, under-voltage and over-voltage shutdown, fail-safe
pin status, and program status
• Enhanced -16V reverse polarity V_PWR protection
33988
HIGH SIDE SWITCH
BOTTOM VIEW
PNA SUFFIX
98ARL10521D
16-PIN PQFN
ORDERING INFORMATION
Device
Temperature
Range (T_A)
Package
MC33988CPNA -40°C to 125°C
16 PQFN
V_DD
V_DD
I/O
I/O
SO
SCLK
MCU CS
SI
I/O
I/O
I/O
A/D
V_DD
V_PWR
33988
VDD
VPWR
FS
WAKE
SI
SCLK
CS
SO
RST
INO
IN1
CSNS
FSI
HS1
HS0
GND
GND
LOAD
LOAD
Figure 1. 33988 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., 2009. All rights reserved.