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参数资料
型号： ADP2325ACPZ-R7
厂商： Analog Devices Inc
文件页数： 2/32页
文件大小： 0K
描述： IC REG CTRLR BUCK PWM CM 32LFCSP
标准包装： 1
PWM 型： 电流模式
输出数： 2
频率 - 最大： 1.2MHz
占空比： 90%
电源电压： 4.5 V ~ 20 V
降压： 是
升压： 无
回扫： 无
反相： 无
倍增器： 无
除法器： 无
Cuk： 无
隔离： 无
工作温度： -40°C ~ 125°C
封装/外壳： 32-WFQFN 裸露焊盘，CSP
包装： 标准包装
其它名称： ADP2325ACPZ-R7DKR

ADP2325
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Typical Application Circuit ............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Functional Block Diagram .............................................................. 3
Specifications..................................................................................... 4
Absolute Maximum Ratings ....................................................... 6
Thermal Resistance ...................................................................... 6
ESD Caution .................................................................................. 6
Pin Configuration and Function Descriptions ............................. 7
Typical Performance Characteristics ............................................. 9
Theory of Operation ...................................................................... 16
Control Scheme .......................................................................... 16
PWM Mode ................................................................................. 16
PFM Mode ................................................................................... 16
Precision Enable/Shutdown ...................................................... 16
Separate Input Voltages ............................................................. 16
Internal Regulator (INTVCC) .................................................. 16
Bootstrap Circuitry .................................................................... 17
Low-Side Driver.......................................................................... 17
Oscillator ..................................................................................... 17
Synchronization .......................................................................... 17
Soft Start ...................................................................................... 17
Peak Current-Limit and Short-Circuit Protection................. 17
Voltage Tracking ......................................................................... 18
Parallel Operation....................................................................... 18
Power Good................................................................................. 19
Data Sheet
Overvoltage Protection .............................................................. 19
Undervoltage Lockout ............................................................... 19
Thermal Shutdown .................................................................... 19
Applications Information .............................................................. 20
ADIsimPower Design Tool ....................................................... 20
Input Capacitor Selection .......................................................... 20
Output Voltage Setting .............................................................. 20
Voltage Conversion Limitations ............................................... 20
Current-Limit Setting ................................................................ 20
Inductor Selection ...................................................................... 21
Output Capacitor Selection....................................................... 21
Low-Side Power Device Selection ............................................ 22
Programming the UVLO Input ................................................ 22
Compensation Components Design ....................................... 23
Design Example .............................................................................. 24
Output Voltage Setting .............................................................. 24
Current-Limit Setting ................................................................ 24
Frequency Setting ....................................................................... 24
Inductor Selection ...................................................................... 24
Output Capacitor Selection....................................................... 24
Low-Side MOSFET Selection ................................................... 25
Compensation Components ..................................................... 25
Soft Start Time Programming .................................................. 26
Input Capacitor Selection .......................................................... 26
External Components Recommendations .................................. 27
Typical Application Circuits ......................................................... 28
Packaging and Ordering Information ......................................... 32
Outline Dimensions ................................................................... 32
Ordering Guide .......................................................................... 32
REVISION HISTORY
7/12—Rev. 0 to Rev. A
Added ADIsimPower Design Tool Section ................................. 20
Changes to Ordering Guide .......................................................... 32
2/12—Revision 0: Initial Version
Rev. A | Page 2 of 32
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