ZSPM1035A datasheet, PDF - EEWORLD Datasheet

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ZSPM1035A: DescriptionTrue Digital PWM Controller (Single-Phase, Single-Rail); File Size2MB，47 Pages; ManufacturerETC2

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ZSPM1035A Overview

True Digital PWM Controller (Single-Phase, Single-Rail)

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Data Sheet

Rev.1.00 / December 2013

ZSPM1035A

True Digital PWM Controller (Single-Phase, Single-Rail)

Smart Power Management ICs

Power and Precision

ZSPM1035A

True Digital PWM Controller (Single-Phase, Single-Rail)

Contents

List of Figures .......................................................................................................................................................... 5

List of Tables ........................................................................................................................................................... 7

1 IC Characteristics ............................................................................................................................................. 8

1.1. Absolute Maximum Ratings ....................................................................................................................... 8

1.2. Recommended Operating Conditions ....................................................................................................... 9

1.3. Electrical Parameters ................................................................................................................................ 9

2 Product Summary........................................................................................................................................... 12

2.1. Overview .................................................................................................................................................. 12

2.2. Pin Description......................................................................................................................................... 14

2.3. Available Packages ................................................................................................................................. 15

3 Functional Description .................................................................................................................................... 16

3.1. Power Supply Circuitry, Reference Decoupling, and Grounding ............................................................ 16

3.2. Reset/Start-up Behavior .......................................................................................................................... 16

3.3. Digital Power Control ............................................................................................................................... 16

3.3.1. Overview ........................................................................................................................................... 16

3.3.2. Output Voltage Feedback ................................................................................................................. 16

3.3.3. Digital Compensator ......................................................................................................................... 17

3.3.4. Power Sequencing and the CONTROL Pin ...................................................................................... 17

3.3.5. Pre-biased Start-up and Soft Stop .................................................................................................... 18

3.3.6. Current Sensing ................................................................................................................................ 19

3.3.7. Temperature Measurement .............................................................................................................. 20

3.4. Fault Monitoring and Response Generation ............................................................................................ 20

3.4.1. Output Over/Under-Voltage .............................................................................................................. 20

3.4.2. Output Current Protection and Limiting ............................................................................................ 21

3.4.3. Over-Temperature Protection ........................................................................................................... 21

3.5. Configuration ........................................................................................................................................... 21

4 PMBus™ Functionality ................................................................................................................................... 22

4.1. Introduction .............................................................................................................................................. 22

4.2. Timing and Bus Specification .................................................................................................................. 22

4.3. Address Selection via External Resistors ................................................................................................ 23

4.4. Configuration Registers ........................................................................................................................... 24

4.5. Monitoring ................................................................................................................................................ 26

4.6. Additional Registers ................................................................................................................................. 26

4.7. Detailed Description of the Supported PMBus™ Commands ................................................................. 27

4.7.1. OPERATION ..................................................................................................................................... 27

4.7.2. ON_OFF_CONFIG............................................................................................................................ 27

4.7.3. CLEAR_FAULTS .............................................................................................................................. 27

4.7.4. VOUT_MODE ................................................................................................................................... 28

4.7.5. VOUT_COMMAND ........................................................................................................................... 28

4.7.6. STATUS_BYTE................................................................................................................................. 28

4.7.7. STATUS_WORD............................................................................................................................... 29

Data Sheet

December 3, 2013

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

4 of 46

ZSPM1035A

True Digital PWM Controller (Single-Phase, Single-Rail)

4.7.8. STATUS_VOUT ................................................................................................................................ 29

4.7.9. STATUS_IOUT ................................................................................................................................. 30

4.7.10. STATUS_INPUT ............................................................................................................................... 30

4.7.11. STATUS_TEMPERATURE ............................................................................................................... 30

4.7.12. STATUS_CML .................................................................................................................................. 31

4.7.13. STATUS_MFR_SPECIFIC ............................................................................................................... 31

4.7.14. READ_VIN ........................................................................................................................................ 31

4.7.15. READ_VOUT .................................................................................................................................... 31

4.7.16. READ_IOUT ...................................................................................................................................... 32

4.7.17. READ_TEMPERATURE1 ................................................................................................................. 32

4.7.18. READ_TEMPERATURE2 ................................................................................................................. 32

5 Application Information ................................................................................................................................... 33

5.1. Typical Application Circuit ....................................................................................................................... 33

5.1.1. Output Voltage Selection .................................................................................................................. 35

5.1.2. Output Capacitor Selection ............................................................................................................... 35

5.2. Typical Performance Measurements for the ZSPM1035A ...................................................................... 35

5.2.1. Typical Load Transient Response – Capacitor Range #1 – VOUT Range #1 ................................. 36

5.2.2. Typical Load Transient Response – Capacitor Range #2 – VOUT Range #1 ................................. 37

5.2.3. Typical Load Transient Response – Capacitor Range #3 – VOUT Range #1 ................................. 38

5.2.4. Typical Load Transient Response – Capacitor Range #4 – VOUT Range #1 ................................. 39

5.2.5. Typical Load Transient Response – Capacitor Range #1 – VOUT Range #2 ................................. 40

5.2.6. Typical Load Transient Response – Capacitor Range #2 – VOUT Range #2 ................................. 41

5.2.7. Typical Load Transient Response – Capacitor Range #3 – VOUT Range #2 ................................. 42

5.2.8. Typical Load Transient Response – Capacitor Range #4 – VOUT Range #2 ................................. 43

6 Mechanical Specifications .............................................................................................................................. 44

7 Ordering Information ...................................................................................................................................... 45

8 Related Documents ........................................................................................................................................ 45

9 Glossary ......................................................................................................................................................... 45

10 Document Revision History ............................................................................................................................ 46

List of Figures

Figure 2.1

Figure 2.2

Figure 2.3

Figure 3.1

Figure 3.2

Figure 3.3

Figure 3.4

Figure 4.1

Figure 5.1

Data Sheet

December 3, 2013

Typical Application Circuit with a 5V Supply Voltage ....................................................................... 12

Block Diagram................................................................................................................................... 13

Pin-Out QFN24 Package .................................................................................................................. 15

Simplified Block Diagram of the Digital Compensation .................................................................... 17

Power Sequencing ............................................................................................................................ 18

Power Sequencing with Non-zero Off Voltage ................................................................................. 18

Inductor Current Sensing Using the DCR Method............................................................................ 19

PMBus™ Timing Diagram ................................................................................................................ 22

Application Circuit with a 5V Supply Voltage .................................................................................... 33

prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

5 of 46

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