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Freescale Semiconductor Electronic Components Datasheet

MC33981B Datasheet

Single High-Side Switch

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MC33981B pdf
Freescale Semiconductor
Advance Information
Document Number: MC33981
Rev. 6.0, 5/2007
Single High-Side Switch
(4.0 m), PWM clock up to 60kHz
33981B
The 33981 is a high-frequency, self-protected 4.0 mRDS(ON) high-
side switch used to replace electromechanical relays, fuses, and
discrete devices in power management applications.
The 33981 can be controlled by Pulse-Width Modulation (PWM) with
a frequency up to 60 kHz. It is designed for harsh environments, and it
includes self-recovery features. The 33981 is suitable for loads with
high in-rush current, as well as motors and all types of resistive and
inductive loads.
The 33981 is packaged in a 12 x 12 non-leaded power-enhanced
Power QFN package with exposed tabs.
Features
• Single 4.0 mRDS(ON) Maximum High-Side Switch
• PWM Capability up to 60 kHz with Duty Cycle from 5% to 100%
• Very Low Standby Current
• Slew Rate Control with External Capacitor
• Overcurrent and Overtemperature Protection, Undervoltage
Shutdown and Fault Reporting
• Reverse Battery Protection
• Gate Drive Signal for External Low-Side N-Channel MOSFET with
Protection Features
• Output Current Monitoring
• Temperature Feedback
• Pb-Free Packaging Designated by Suffix Code PNA
www.DataSheet4U.com
HIGH-SIDE SWITCH
Bottom View
SCALE 1:1
PNA (Pb-Free Suffix)
98ARL10521D
16-PIN PQFN (12 X 12)
ORDERING INFORMATION
Device
Temperature
Range (TA)
MC33981BPNA/R2 -40°C to 125°C
Package
16 PQFN
VDD
VDD
I/O
I/O
MCU I/O
I/O
A/D
A/D
VPWR
33981
CONF
FS
INLS
EN
INHS
TEMP
CSNS
VPWR
CBOOT
OUT
DLS
GLS
OCLS SR GND
M
Figure 1. 33981 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.



Freescale Semiconductor Electronic Components Datasheet

MC33981B Datasheet

Single High-Side Switch

No Preview Available !

MC33981B pdf
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VPWR
TEMP
Temperature
Feedback
Undervoltage
Detection
Bootstrap Supply
SR
FS
EN
INHS
INLS
Logic
CONF
5.0 V
RDWN
ICONF
IDWN
Cross-
Conduction
Gate Driver
Slew Rate Control
Current Protection
Overtemperature
Detection
OUT Current
Recopy
5.0 V
Low-Side
Gate Driver
and Protection
IOCLS
GND
CSNS
OCLS
Figure 2. 33981 Simplified Internal Block Diagram
CBOOT
OUT
GLS
DLS
33981
2
Analog Integrated Circuit Device Data
Freescale Semiconductor



Freescale Semiconductor Electronic Components Datasheet

MC33981B Datasheet

Single High-Side Switch

No Preview Available !

MC33981B pdf
PIN CONNECTIONS
Package Transparent Top View
PIN CONNECTIONS
GND
13
VPWR
14
15 16
OUT
OUT
Figure 3. Pin Connections
Table 1. PIN DEFINITIONS
Descriptions of the pins listed in the table below can be found in the Functional Description section located on page 12.
Pin
Number
Pin Name
Pin
Function
Formal Name
Definition
1
CSNS
Reports Output Current Monitoring This pin is used to generate a ground-referenced voltage for the
microcontroller (MCU) to monitor output current.
2
TEMP
Reports
Temperature Feedback This pin is used by the MCU to monitor board temperature.
3 EN Input
Enable
(Active High)
This pin is used to place the device in a low-current sleep mode.
4
INHS
Input
Serial Input High Side
This input pin is used to control the output of the device.
5 FS Reports
Fault Status
(Active Low)
This pin monitors fault conditions and is active LOW.
6
INLS
Input
Serial Input Low Side
This pin is used to control an external low-side N-channel MOSFET.
7
CONF
Input
Configuration Input
This input manages MOSFET N-channel cross-conduction.
8
OCLS
Input
Low-Side Overload
This pin sets the VDS protection level of the external low-side
MOSFET.
9 DLS Input
10
GLS
Output
Drain Low Side
Low-Side Gate
This pin is the drain of the external low-side N-channel MOSFET.
This output pin drives the gate of the external low-side N-channel
MOSFET.
11
12
13
14
15, 16
SR
CBOOT
GND
VPWR
OUT
Input
Input
Ground
Input
Output
Slew Rate Control
Bootstrap Capacitor
Ground
Positive Power Supply
Output
This pin controls the output slew rate.
This pin provides the high-pulse current to drive the device.
This is the ground pin of the device.
This pin is the source input of operational power for the device.
These pins provide a protected high-side power output to the load
connected to the device.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33981
3




Part Number MC33981B
Description Single High-Side Switch
Maker Freescale Semiconductor
Total Page 30 Pages
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