
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 (TA)
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 m
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 I2C Bus
Overcurrent Protection
Reset with Programmable Power-ON Delay
Enable Inputs
I2C is a trademark of Phillips Corporation.
POWER SUPPLY
INTEGRATED CIRCUIT
Othe r
Circuits
ADDR
LDRV
LDO
LFB
CS
RT
RES ET
VDDH (I/Os)
VDDL (Core)
SW
MPC85xx
PG ND
INV
EN1
MC3 3703
2.8 V to 1 3. 5 V In put
VIN2
VBST
VBD
CLKS YN
CLKS EL
FREQ
Optional
PORESET
0.8to5.0 V
0.8 t o 5. 0 V
(Adjustable)
VIN1
EN2
GND
BO OT
SDA
SCL
VOUT
VBS T
SR
33702
VIN2
VIN1
VBD
VBST
VOUT
VLDO =
VOUT =
MPC8XXX
2.8 V to 6.0 V
DWB SUFFIX
CASE 1324-02
32-LEAD SOICW