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34702

更新时间: 2022-04-23 23:00:11
品牌 Logo 应用领域
飞思卡尔 - FREESCALE 稳压器开关
页数 文件大小 规格书
38页 862K
描述
3.0 A Switch-Mode Power Supply with Linear Regulator

34702 数据手册

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Document Number: MC34702  
Rev 6.0, 2/2007  
Freescale Semiconductor  
Technical Data  
3.0 A Switch-Mode Power  
Supply with Linear Regulator  
34702  
The 34702 provides the means to efficiently supply the Freescale  
Power QUICC™ I, II, and other families of Freescale  
microprocessors and DSPs. The 34702 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.  
POWER SUPPLY  
INTEGRATED CIRCUIT  
The switching regulator is a high-efficiency synchronous buck  
regulator with integrated N-channel power MOSFETs to provide  
protection features and to allow space-efficient, compact design.  
The 34702 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  
EK (PB-FREE) SUFFIX  
98AARH99137A  
• Operating Voltage from 2.8 V to 6.0 V  
• High-Accuracy Output Voltages  
32-PIN SOICW  
• Fast Transient Response  
• Switcher Output Current Up to 3.0 A  
• Undervoltage Lockout and Overcurrent Protection  
• Enable Inputs and Programmable Watchdog Timer  
• Voltage Margining via I2C™ Bus  
ORDERING INFORMATION  
• Reset with Programmable Power-ON Delay  
• Pb-Free Packaging Designated by Suffix Code EK  
Temperature  
Package  
Device  
Range (T )  
A
I2C is a trademark of Philips Corporation.  
MC34702EK/R2  
-40 to 85°C  
32 SOICW  
2.8 V to 6.0 V Input  
34702  
Other  
Circuits  
VIN2  
VIN1  
VBD  
VBST  
LDRV  
CS  
Adjustable:  
0.8 V to VIN -  
Dropout  
LDO  
LFB  
VDDH (I/Os)  
RT  
ADDR  
MPC8xxx  
SDA  
SCL  
PORESET  
RST  
GND  
Adjustable:  
0.8 V to VIN -  
Dropout  
VBST  
BOOT  
SW  
EN1  
VDDL (Core)  
EN2  
VOUT  
CLKSYN  
PGND  
CLKSEL  
FREQ  
INV  
Optional  
VDDI  
Figure 1. 34702 Simplified Application Diagram  
Freescale Semiconductor, Inc. reserves the right to change the detail specifications,  
as may be required, to permit improvements in the design of its products.  
© Freescale Semiconductor, Inc., 2007. All rights reserved.  

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