Document Number: MC34988
Rev. 1.0, 9/2014
Freescale Semiconductor
Advance Information
Dual Intelligent High-current
Self-protected Silicon High-side
Switch (8.0 mOhm
34988
The 34988 is a dual self-protected 8.0 m switch used to replace
electromechanical relays, fuses, and discrete devices in power management
applications. The 34988 is designed for harsh environment and 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
FK SUFFIX
98ARL10521D
16-PIN PQFN
The 34988 is packaged in a power-enhanced 12 mm x 12 mm nonleaded
PQFN package with exposed tabs and powered by SMARTMOS technology.
Features
• Dual 8.0 m max high-side switch with parallel input or SPI control
• 6.0 V to 27 V operating voltage with standby currents < 5.0 A
• 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
Applications
• Low-voltage factory automation
• DC motor or solenoid
• Resistive and inductive loads
• Low-voltage industrial lighting
• SPI status reporting of overcurrent, open and shorted loads,
overtemperature, undervoltage and overvoltage shutdown, fail-safe pin
status, and program status
• Enhanced -16 V reverse polarity VPWR protection
VDD
VDD
VDD
VPWR
34988
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. 34988 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., 2014. All rights reserved.