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ZSPM1025C: DescriptionTrue Digital PWM Controller (Single-Phase, Single-Rail); File Size2MB，40 Pages; ManufacturerETC2

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ZSPM1025C Overview

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

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Data Sheet

Rev. 1.00 / October 2013

ZSPM1025C / ZSPM1025D

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

Smart Power Management ICs

Power and Precision

ZSPM1025C / ZSPM1025D

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

Contents

Features ................................................................................................................................................................... 2

Benefits .................................................................................................................................................................... 2

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

List of Tables ........................................................................................................................................................... 6

1 IC Characteristics ............................................................................................................................................. 7

1.1. Absolute Maximum Ratings ....................................................................................................................... 7

1.2. Recommended Operating Conditions ....................................................................................................... 8

1.3. Electrical Parameters ................................................................................................................................ 8

2 Product Summary........................................................................................................................................... 11

2.1. Overview .................................................................................................................................................. 11

2.2. Pin Description......................................................................................................................................... 13

2.3. Available Packages ................................................................................................................................. 14

3 Functional Description .................................................................................................................................... 14

3.1. Power Supply Circuitry, Reference Decoupling, and Grounding ............................................................ 14

3.2. Reset/Start-up Behavior .......................................................................................................................... 15

3.3. Digital Power Control ............................................................................................................................... 15

3.3.1. Overview ........................................................................................................................................... 15

3.3.2. Output Voltage Feedback ................................................................................................................. 15

3.3.3. Digital Compensator ......................................................................................................................... 15

3.3.4. Power Sequencing and the CONTROL Pin ...................................................................................... 16

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

3.3.6. Current Sensing ................................................................................................................................ 18

3.3.7. Temperature Measurement .............................................................................................................. 19

3.4. Fault Monitoring and Response Generation ............................................................................................ 19

3.4.1. Output Over/Under Voltage .............................................................................................................. 19

3.4.2. Output Current Protection ................................................................................................................. 20

3.4.3. Over-Temperature Protection ........................................................................................................... 20

3.5. Monitoring and Debugging via I C™ ....................................................................................................... 20

4 Application Information ................................................................................................................................... 21

4.1. Typical Application Circuit ....................................................................................................................... 21

4.2. Pin Strap Options of the ZSPM1025C/D ................................................................................................. 24

4.2.1. CONFIG0 – Output Voltage .............................................................................................................. 24

4.2.2. CONFIG1 – Compensation Loop and Output Voltage Slew Rate .................................................... 25

4.3. Typical Performance Measurements for the ZSPM1025C and ZSPM1025D ......................................... 28

4.3.1. Typical Load Transient Response – ZSPM1025C – Capacitor Range #1 – Comp0........................ 29

4.3.2. Typical Load Transient Response – ZSPM1025C – Capacitor Range #2 – Comp1........................ 30

4.3.3. Typical Load Transient Response – ZSPM1025C – Capacitor Range #3 – Comp2........................ 31

4.3.4. Typical Load Transient Response – ZSPM1025C – Capacitor Range #4 – Comp3........................ 32

4.3.5. Typical Load Transient Response – ZSPM1025D – Capacitor Range #1 – Comp0........................ 33

4.3.6. Typical Load Transient Response – ZSPM1025D – Capacitor Range #2 – Comp1........................ 34

Data Sheet

October 28, 2013

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

4 of 39

ZSPM1025C / ZSPM1025D

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

4.3.7. Typical Load Transient Response – ZSPM1025D – Capacitor Range #3 – Comp2........................ 35

4.3.8. Typical Load Transient Response – ZSPM1025D – Capacitor Range #4 – Comp3........................ 36

Mechanical Specifications .............................................................................................................................. 37

Glossary ......................................................................................................................................................... 38

Ordering Information ...................................................................................................................................... 38

Related Documents ........................................................................................................................................ 39

Document Revision History ............................................................................................................................ 39

List of Figures

Figure 2.1

Figure 2.2

Figure 2.3

Figure 3.1

Figure 3.2

Figure 3.3

Figure 4.1

Figure 4.2

Figure 4-3

Figure 4-4

Figure 4-5

Figure 4-6

Figure 4-7

Figure 4-8

Figure 4-9

Figure 4-10

Figure 4-11

Figure 4-12

Figure 4-13

Figure 4-14

Figure 4-15

Figure 4-16

Figure 4-17

Figure 4-18

Figure 4-19

Figure 4-20

Figure 4-21

Figure 4-22

Figure 4-23

Figure 4-24

Figure 4-25

Figure 4-26

Typical Application Circuit with a 5 V Supply Voltage ...................................................................... 11

Block Diagram................................................................................................................................... 12

Pin-Out QFN24 Package .................................................................................................................. 14

Simplified Block Diagram for the Digital Compensation ................................................................... 16

Power Sequencing ............................................................................................................................ 17

Inductor Current Sensing Using the DCR Method............................................................................ 18

ZSPM1025C – Application Circuit with a 5V Supply Voltage ........................................................... 21

ZSPM1025D – Application Circuit with a 5V Supply Voltage ........................................................... 22

5 to 15A Load Step – Min. Capacitance ........................................................................................... 29

15 to 5A Load Step – Min. Capacitance ........................................................................................... 29

5 to 15A Load Step – Max. Capacitance .......................................................................................... 29

15 to 5A Load Step – Max. Capacitance .......................................................................................... 29

Open Loop Bode Plots ...................................................................................................................... 29

5 to 15A Load Step – Min. Capacitance ........................................................................................... 30

15 to 5A Load Step – Min. Capacitance ........................................................................................... 30

5 to 15A Load Step – Max. Capacitance .......................................................................................... 30

15 to 5A Load Step – Max. Capacitance .......................................................................................... 30

Open Loop Bode Plots ...................................................................................................................... 30

5 to 15A Load Step – Min. Capacitance ........................................................................................... 31

15 to 5A Load Step – Min. Capacitance ........................................................................................... 31

5 to 15A Load Step – Max. Capacitance .......................................................................................... 31

15 to 5A Load Step – Max. Capacitance .......................................................................................... 31

Open Loop Bode Plots ...................................................................................................................... 31

5 to 15A Load Step – Min. Capacitance ........................................................................................... 32

15 to 5A Load Step – Min. Capacitance ........................................................................................... 32

5 to 15A Load Step – Max. Capacitance .......................................................................................... 32

15 to 5A Load Step – Max. Capacitance .......................................................................................... 32

Open Loop Bode Plots ...................................................................................................................... 32

5 to 20A Load Step – Min. Capacitance ........................................................................................... 33

20 to 5A Load Step – Min. Capacitance ........................................................................................... 33

5 to 20A Load Step – Max. Capacitance .......................................................................................... 33

20 to 5A Load Step – Max. Capacitance .......................................................................................... 33

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

Data Sheet

October 28, 2013

5 of 39

ZSPM1025C Related Products

	ZSPM1025C	ZSPM1025CA1W0	ZSPM1025D	ZSPM1025DA1W0	ZSPM8725-KIT	ZSPM8825-KIT
Description	True Digital PWM Controller (Single-Phase, Single-Rail)	True Digital PWM Controller (Single-Phase, Single-Rail)	True Digital PWM Controller (Single-Phase, Single-Rail)	True Digital PWM Controller (Single-Phase, Single-Rail)	Evaluation Kit for the ZSPM1025C True Digital PWM Controller and the Murata OKLP-X/25-W12-C Power Block	Evaluation Kit for the ZSPM1025D True Digital PWM Controller and the Murata OKLP-X/25-W12-C Power Block

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