Freescale Semiconductor, Inc.
SEMICONDUCTOR TECHNICAL DATA
Order this document from Analog Marketing: MC33702/D
Rev 0, 05/2003
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.
• 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.
PC33702DWB/R2 -40 to 85°C
Op ti on a l
33702 Simplified Application Diagram
22..88VVtoto1 36. 5.0VVIn put
CLKS YN VVOOUUTT
CLKS EL PG ND
FR E Q
O the r
Ci r cuits
0.8 t o 5. 0 V
(Adj u sta b l e)
0.8 to 5.0 V
This document contains information on a product under development.
Motorola reserves the right to change or discontinue this product without notice.
© Motorola, Inc. 2003
For More Information On This Product,
Go to: www.freescale.com