zl2106 Intersil Corporation, zl2106 Datasheet - Page 2

• Manufacturer Part Number: zl2106
• Description: 6a Digital-dc Synchronous Step-down Dc-dc Converter
• Manufacturer: Intersil Corporation

1. Electrical Characteristics ...............................................................................................................................................3
2. Typical Performance Curves .........................................................................................................................................6
3. Pin Descriptions ............................................................................................................................................................8
4. Typical Application Circuit.........................................................................................................................................10
5. ZL2106 Overview .......................................................................................................................................................11
6. Power Conversion Functional Description..................................................................................................................15
7. Power Management Functional Description ...............................................................................................................24
8. Package Dimensions....................................................................................................................................................32
9. Ordering Information ..................................................................................................................................................33
10. Tools and Related Documentation ............................................................................................................................33
11. Revision History........................................................................................................................................................34
5.1 Digital-DC Architecture........................................................................................................................................11
5.2 Power Conversion Overview ................................................................................................................................11
5.3 Power Management Overview..............................................................................................................................13
5.4 Multi-mode Pins....................................................................................................................................................13
6.1 Internal Bias Regulators and Input Supply Connections ......................................................................................15
6.2 High-side Driver Boost Circuit .............................................................................................................................15
6.3 Output Voltage Selection ......................................................................................................................................15
6.4 Start-up Procedure.................................................................................................................................................16
6.5 Soft Start Delay and Ramp Times.........................................................................................................................16
6.6 Power Good (PG)..................................................................................................................................................18
6.7 Switching Frequency and PLL..............................................................................................................................18
6.8 Component Selection ............................................................................................................................................19
6.9 Current Sensing and Current Limit Threshold Selection ......................................................................................22
6.10 Loop Compensation ............................................................................................................................................23
6.11 Driver Dead-time Control ...................................................................................................................................23
7.1 Input Undervoltage Lockout .................................................................................................................................24
7.2 Output Overvoltage Protection .............................................................................................................................24
7.3 Output Pre-Bias Protection ...................................................................................................................................24
7.4 Output Overcurrent Protection..............................................................................................................................25
7.5 Thermal Overload Protection................................................................................................................................25
7.6 Voltage Tracking...................................................................................................................................................26
7.7 Voltage Margining ................................................................................................................................................27
7.8 I
7.9 I
7.10 Digital-DC Bus ...................................................................................................................................................28
7.11 Phase Spreading ..................................................................................................................................................29
7.12 Output Sequencing..............................................................................................................................................29
7.13 Fault Spreading ...................................................................................................................................................30
7.14 Monitoring via I
7.15 Snapshot™ Parametric Capture ..........................................................................................................................30
7.16 Non-Volatile Memory and Device Security Features .........................................................................................31
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C/SMBus Communications ................................................................................................................................28
C/SMBus Device Address Selection ..................................................................................................................28
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C/SMBus .................................................................................................................................30
Table of Contents
ZL2106
Data Sheet Revision 2/19/2009
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