Datasheet ADP2121 (Analog Devices) - 2
| 制造商 | Analog Devices |
| 描述 | 600 mA, 6 MHz Synchronous Step-Down DC-to-DC Converter |
| 页数 / 页 | 20 / 2 — ADP2121. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY. 9/2017—Rev. B … |
| 修订版 | C |
| 文件格式/大小 | PDF / 2.4 Mb |
| 文件语言 | 英语 |
ADP2121. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY. 9/2017—Rev. B to Rev. C. 1/2011—Rev. A to Rev. B. 6/2010—Rev. 0 to Rev. A
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ADP2121 Data Sheet TABLE OF CONTENTS
Features .. 1 Overview ... 14 Applications ... 1 Mode Selection ... 14 Typical Application Circuit ... 1 Enable/Shutdown ... 15 General Description ... 1 Internal Control Features .. 15 Revision History ... 2 Applications Information .. 17 Specifications ... 3 Inductor Selection .. 17 Absolute Maximum Ratings .. 4 Input Capacitor Selection .. 17 Thermal Data .. 4 Output Capacitor Selection ... 17 Thermal Resistance .. 4 PCB Layout Guidelines .. 19 ESD Caution .. 4 Outline Dimensions ... 20 Pin Configuration and Function Descriptions ... 5 Ordering Guide .. 20 Typical Performance Characteristics ... 6 Theory of Operation .. 14
REVISION HISTORY 9/2017—Rev. B to Rev. C
Changes to Figure 10 to Figure 12; Added Figure 13 to Figure 15 ... 7 Updated Outline Dimensions ... 20 Changes to Figure 16, Figure 17, Figure 19, and Figure 20.. 8 Changes to Ordering Guide .. 20 Changes to Figure 22; Added Figure 23 and Figure 24 .. 9 Added Figure 40, Figure 42, Figure 43, and Figure 45 .. 12
1/2011—Rev. A to Rev. B
Added Figure 46 and Figure 48; Changes to Figure 47 ... 13 Changes to Table 2 Summary .. 3 Changes to Figure 51 and the Overview Section ... 14 Changes to Undervoltage Lockout Threshold Parameter and Changes to the Auto Mode (PFM and PWM Switching) Section, Output Voltage Accuracy Parameter in Table 2 ... 3 Figure 53, the Mode Transition Section, and the Enable/ Shutdown Section ... 15
6/2010—Rev. 0 to Rev. A
Changes to the Output Short-Circuit Protection Section and Changes to Features, General Description, Figure 1, and Figure 55 .. 16 Figure 2; Added Table 1; Renumbered Sequentially .. 1 Changes to the Output Capacitor Selection Section ... 17 Changes to Table 2 .. 3 Changes to Table 6, Table 7, and Table 8 ... 18 Changes to Table 3 .. 4 Changes to Ordering Guide .. 20 Change to Typical Performance Characteristics Condition Statement; Reorganized Typical Performance Characteristics
4/2009—Revision 0: Initial Version
Section; Changes to Figure 4, Figure 6, Figure 7, and Figure 9; Added Figure 5 and Figure 8; Renumbered Sequentially ... 6 Rev. C | Page 2 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION OVERVIEW MODE SELECTION Pulse-Width Modulation (PWM) Mode Auto Mode (PFM and PWM Switching) Pulse Frequency Modulation (PFM) Mode Transition ENABLE/SHUTDOWN INTERNAL CONTROL FEATURES Overcurrent Protection Soft Start Synchronous Rectification Compensation Undervoltage Lockout (UVLO) Output Short-Circuit Protection Thermal Shutdown (TSD) Protection APPLICATIONS INFORMATION INDUCTOR SELECTION INPUT CAPACITOR SELECTION OUTPUT CAPACITOR SELECTION PCB LAYOUT GUIDELINES OUTLINE DIMENSIONS ORDERING GUIDE
ADP2121 Data Sheet TABLE OF CONTENTS
Features .. 1 Overview ... 14 Applications ... 1 Mode Selection ... 14 Typical Application Circuit ... 1 Enable/Shutdown ... 15 General Description ... 1 Internal Control Features .. 15 Revision History ... 2 Applications Information .. 17 Specifications ... 3 Inductor Selection .. 17 Absolute Maximum Ratings .. 4 Input Capacitor Selection .. 17 Thermal Data .. 4 Output Capacitor Selection ... 17 Thermal Resistance .. 4 PCB Layout Guidelines .. 19 ESD Caution .. 4 Outline Dimensions ... 20 Pin Configuration and Function Descriptions ... 5 Ordering Guide .. 20 Typical Performance Characteristics ... 6 Theory of Operation .. 14
REVISION HISTORY 9/2017—Rev. B to Rev. C
Changes to Figure 10 to Figure 12; Added Figure 13 to Figure 15 ... 7 Updated Outline Dimensions ... 20 Changes to Figure 16, Figure 17, Figure 19, and Figure 20.. 8 Changes to Ordering Guide .. 20 Changes to Figure 22; Added Figure 23 and Figure 24 .. 9 Added Figure 40, Figure 42, Figure 43, and Figure 45 .. 12
1/2011—Rev. A to Rev. B
Added Figure 46 and Figure 48; Changes to Figure 47 ... 13 Changes to Table 2 Summary .. 3 Changes to Figure 51 and the Overview Section ... 14 Changes to Undervoltage Lockout Threshold Parameter and Changes to the Auto Mode (PFM and PWM Switching) Section, Output Voltage Accuracy Parameter in Table 2 ... 3 Figure 53, the Mode Transition Section, and the Enable/ Shutdown Section ... 15
6/2010—Rev. 0 to Rev. A
Changes to the Output Short-Circuit Protection Section and Changes to Features, General Description, Figure 1, and Figure 55 .. 16 Figure 2; Added Table 1; Renumbered Sequentially .. 1 Changes to the Output Capacitor Selection Section ... 17 Changes to Table 2 .. 3 Changes to Table 6, Table 7, and Table 8 ... 18 Changes to Table 3 .. 4 Changes to Ordering Guide .. 20 Change to Typical Performance Characteristics Condition Statement; Reorganized Typical Performance Characteristics
4/2009—Revision 0: Initial Version
Section; Changes to Figure 4, Figure 6, Figure 7, and Figure 9; Added Figure 5 and Figure 8; Renumbered Sequentially ... 6 Rev. C | Page 2 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION OVERVIEW MODE SELECTION Pulse-Width Modulation (PWM) Mode Auto Mode (PFM and PWM Switching) Pulse Frequency Modulation (PFM) Mode Transition ENABLE/SHUTDOWN INTERNAL CONTROL FEATURES Overcurrent Protection Soft Start Synchronous Rectification Compensation Undervoltage Lockout (UVLO) Output Short-Circuit Protection Thermal Shutdown (TSD) Protection APPLICATIONS INFORMATION INDUCTOR SELECTION INPUT CAPACITOR SELECTION OUTPUT CAPACITOR SELECTION PCB LAYOUT GUIDELINES OUTLINE DIMENSIONS ORDERING GUIDE