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Motorola Electronic Components Datasheet

MC33702 Datasheet

Microprocessor Power Supply

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Freescale Semiconductor, Inc.
ANALOG
PRODUCTS
MC33702
FACT SHEET
APPLICATIONS
• Power Management
of Advanced
Microprocessor
Based Systems
• Telecom and
Network Cards
• Wireless Modems
• ADSL Line Cards
• Cable Modems
• Li-ion Cell Equipment
• Portable Equipment
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.
A boost converter allows high-accuracy output voltages to be developed from
source operating voltages as low as 2.8 V. Seven ±1.0% Output Voltage Margining
steps are provided to facilitate easy system development.
Simplified Application Diagram
2.8 to 6.0 V
33702
VIN2 VIN1
VBD
EN1
EN2
SCL
SDA
ADDR
RT
CLKSYN
CLKSEL
FREQ
VDDI
GND
LDRV
CS
LDO
LCMP
LFB
VBST
RESET
BOOT
SW
VOUT
INV
PGND
Other
Circuits
VLDO
0.8 to 5.0 V
(Adjustable)
1.0 A VDDH (I/Os)
MPC82XX
PORESET
VOUT
0.8 to 5.0 V
(Adjustable)
3.0 A VDDL (Core)
For More Information On This Product,
Go to: www.freescale.com


Motorola Electronic Components Datasheet

MC33702 Datasheet

Microprocessor Power Supply

No Preview Available !

Freescale Semiconductor, Inc.
FEATURES
• I2C 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 SG1002/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
Operating Voltage
Output Voltages:
SW (Adjustable)
LDO (Adjustable)
Voltage Margining
Buck Converter
Line & Load Reg.
Current Limit
PWM Freq. (Adjustable)
Operating Temp
For More Information On This Product,
Go to: www.freescale.com
Typical Values
2.8 V to 6.0 V
0.8 to 5.0 V @ 3.0 A
0.8 to 5.0 V @ 1.0 A
7 steps ± 1.0%
± 1.0%
4.5 A
200 to 400 kHz
-40°C TA 105°C


Part Number MC33702
Description Microprocessor Power Supply
Maker Motorola
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MC33702 Datasheet PDF






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