MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
33702 Simplified Application Diagram
This document contains information on a product under development.
Motorola reserves the right to change or discontinue this product without notice.
© Motorola, Inc. 2003
Order this document from Analog Marketing: MC33702/D
Rev 0, 05/2003
33702
Preliminary Information
ORDERING INFORMATION
Device
Temperature
Range (T
A
)
Package
PC33702DWB/R2 -40 to 85°C 32 SOICW
3.0 A Switch-Mode Power Supply
with Linear Regulator
The 33702 provides the means to efficiently supply the Power QUICC™ I,
II, and other families of Motorola microprocessors and DSPs. The 33702
incorporates a high-performance switching regulator, providing the direct
supply for the microprocessor’s core, and a low dropout (LDO) linear regulator
control circuit providing the microprocessor I/O and bus voltage.
The switching regulator is a high-efficiency synchronous buck regulator with
integrated 50 mΩ N-channel power MOSFETs to provide protection features
and to allow space-efficient, compact design.
The 33702 incorporates many advanced features; e.g., precisely
maintained up/down power sequencing, ensuring the proper operation and
protection of the CPU and power system.
Features
• Operating Voltage: 2.8 V to 6.0 V
• High-Accuracy Output Voltages
• Fast Transient Response
• Switcher Output Current Up to 3.0 A
• Undervoltage Lockout
• Power Sequencing
• Programmable Watchdog Timer
• Voltage Margining via I
2
C™ Bus
• Overcurrent Protection
• Reset with Programmable Power-ON Delay
• Enable Inputs
I
2
C is a trademark of Phillips Corporation.
POWER SUPPLY
INTEGRATED CIRCUIT
Other
Circuits
ADDR
LDRV
LDO
LFB
CS
RT
RES ET
VDDH (I/Os)
VDDL (Core)
SW
MPC85xx
PGND
INV
EN1
MC3 3703
2.8 V to 1 3. 5 V In put
VIN2
VBST
VBD
CLKSYN
CLKSEL
FREQ
Optional
PORESET
0.8to5.0V
0.8 to 5.0 V
(Adjustable)
(Adjustable)
VIN1
EN2
GND
BOOT
SDA
SCL
VOUT
VBST
SR
33702
V
IN2
V
IN1
V
BD
V
BST
V
OUT
V
LDO
=
V
OUT
=
MPC8XXX
2.8 V to 6.0 V

DWB SUFFIX
CASE 1324-02
32-LEAD SOICW


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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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