MC33702DWBR2 [NXP]
MC33702DWBR2;
NXP 
Freescale Semiconductor, Inc.
ANALOG
PRODUCTS
MC33702
FACT SHEET
33702 MICROPROCESSOR POWER SUPPLY (3.0 A)
The 33702 is a monolithic IC providing an efficient means of obtaining power for
the Motorola Power QUICC I and II microprocessor families and other advanced
microprocessors. The IC incorporates a high-performance synchronous switching
regulator. The regulator is capable of delivering 3.0 A to power the microprocessor's
core and linear circuitry to control an external low-drop FET for powering the micro-
processor's I/O operations. Both regulator output voltages are independently
adjustable.
APPLICATIONS
• Power Management
of Advanced
Microprocessor
Based Systems
A boost converter allows high-accuracy output voltages to be developed from
source operating voltages as low as 2.8 V. Seven ±±.0ꢀ Output Voltage Margining
steps are provided to facilitate easy system development.
• Telecom and
Network Cards
• Wireless Modems
• ADSL Line Cards
• Cable Modems
SWTCHING
• Li-ion Cell Equipment
• Portable Equipment
Simplified Application Diagram
POWRAGMENT
2.8 to 6.0 V
33702
V
V
V
IN±
IN2
Other
Circuits
LDRV
CS
BD
0.8 to 5.0 V
(Adjustable)
EN±
EN2
SCL
SDA
ADDR
V
LDO
LDO
LCMP
V
(I/Os)
DDH
±.0 A
MPC82XX
LFB
V
BST
RT
RESET
BOOT
PORESET
0.8 to 5.0 V
(Adjustable)
V
OUT
SW
V
(Core)
DDL
CLKSYN
CLKSEL
3.0 A
V
OUT
FREQ
INV
V
DDI
GND
PGND
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Freescale Semiconductor, Inc.
FEATURES
2
• I C with address register selection for programming control
• Programmable internal Watchdog and Power-ON Reset to ensure MCU
performance integrity
• Synchronous buck converter with cycle-by-cycle PWM current mode control for
enhanced output voltage accuracy
• Boost converter for enhanced low-voltage performance
• Adjustable switching regulator output voltage via external resistor divider
• External RC programmed Reset Power-UP Delay timer
• Additional devices available for comparison in Analog Selector Guide SG±002/D
CUSTOMER BENEFITS
• High-performance power source supporting advanced microprocessors
• High-efficiency step-down switching regulator
• Reduced PC board space resulting in enhanced application reliability and lower
costs
• Self-contained Watchdog with Power-ON Reset
• Predictable up/down power sequencing to ensure CPU integrity
• Flexible application protection and programmable performance features
• Voltage margining for easy system development
Performance
Typical Values
Operating Voltage
2.8 V to 6.0 V
Output Voltages:
SW (Adjustable)
LDO (Adjustable)
Voltage Margining
Buck Converter
Line & Load Reg.
Current Limit
0.8 to 5.0 V @ 3.0 A
0.8 to 5.0 V @ ±.0 A
7 steps ± ±.0ꢀ
± ±.0ꢀ
4.5 A
PWM Freq. (Adjustable)
Operating Temp
200 to 400 kHz
-40°C ≤ T ≤ ±05°C
A
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Freescale Semiconductor, Inc.
33702 Internal Block Diagram
V
V
IN
IN±
V
V
DDI
DDI
Internal
Supply
V
DDI
8.0 V
V
V
V
BST
BST
V
BST
Power
Enable
-
LDRV
CS
V
REF
+
Linear
Regulator
Control
DDI
V
V
DDI
REF
V
BD
LDO
Bandgap
Voltage
Reference
Boost
Control
V
REF
I
Lim
V
REF
LFB
V
DDI
LCMP
V
Power
Seq
LDO
EN±
EN2
Power
Sequencing
Power
Down
UVLO
V
BST
Voltage Margining
Watchdog Timer
RESET
RESET
V
OUT
Reset
Control
V
BOOT
BST
SysCon
Current Limit
POR
V
Timer
IN2
I2C
RT
V
(2)
DDI
Control
Buck
HS
and
LS
Driver
Q±
Q2
I2C
SysCon
SoftSt
Control
Thermal
Limit
Buck
Control
Logic
SW
(2)
(2)
ADDR
I2C
Interface
PGND
INV
SDA
SCL
To Reset
Control
Error
Amp
PWM
Comp
0.8 V
Switcher
Oscillator
300 kHz
+
+
-
-
V
OUT
Slope
Comp
V
OUT
Power
Seq
(4)
CLKSEL
CLKSYN FREQ
PGND
Shut
Down
Auto
Recovery
Protection
Detect
Limiting
Input Under Voltage
Output Over Voltage
Output Under Voltage
Over Current/SC
•
•
•
•
•
•
•
•
•
•
•
•
•
Over Temperature
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Freescale Semiconductor, Inc.
Ordering
Ship
Motorola
Part Number
Information Package Method
32 SOICW
Rail
T/R
**33702DWB
**33702DWBR2
Data Sheet Order Number
MC33702/D
Contact Sales for Evaluation Kit Availability
**Prefix Index:
PC = Eng Samples; XC = In Qual; MC = Production
QUESTIONS
• Do you need an accurate power management IC to power an advanced micro-
processor?
• Do you have little PC board space available for power management?
• Are you looking for an easy-to-design power management IC with protection
and operating features that can be performance programmed?
How to reach us:
USA/EUROPE/Locations Not Listed: Motorola Literature Distribution;
P.O. Box 5405, Denver, Colorado 802±7
±-800-52±-6274 or 480-768-2±30
JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center,
3–20–±, Minami–Azabu. Minato–ku, Tokyo ±06–8573 Japan
8±–3–3440–3569
MOTOROLA and the Stylized M Logo are registered in the U.S. Patent and Trademark Office.
All other product or service names are the property of their respective owners.
Motorola, Inc. is an Equal Opportunity Affirmative Action Employer
© Motorola, Inc. 2003
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre,
2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong
852–26668334
MC33702FS/D
Rev. ±
HOME PAGE: http://motorola.com/semiconductors
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