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ZSPM4022-06: Description12V/6A Synchronous DC/DC Buck Regulator; File Size1MB，38 Pages; ManufacturerETC2

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12V/6A Synchronous DC/DC Buck Regulator

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Data Sheet

Rev. 1.00 / August 2013

ZSPM4022-06

12V/6A Synchronous DC/DC Buck Regulator

Analog ICs

Powerful

and Determined

ZSPM4022-06

12V/6A Synchronous DC/DC Buck Regulator

Contents

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

List of Tables ........................................................................................................................................................... 5

1 IC Characteristics ............................................................................................................................................. 6

1.1. Absolute Maximum Ratings ....................................................................................................................... 6

1.2. Operating Conditions ................................................................................................................................. 6

1.3. Electrical Parameters ................................................................................................................................ 7

1.4. Typical Characteristics .............................................................................................................................. 9

1.5. Functional Characteristics ....................................................................................................................... 13

2 Functional Description .................................................................................................................................... 16

2.1. Overview .................................................................................................................................................. 16

2.2. Pin Configuration and Description ........................................................................................................... 17

2.3. Theory of Operation ................................................................................................................................. 19

2.3.1. Continuous Mode .............................................................................................................................. 19

2.3.2. Discontinuous Mode ......................................................................................................................... 22

2.3.3. VDD Regulator .................................................................................................................................. 23

2.3.4. Soft–Start .......................................................................................................................................... 23

2.3.5. Current Limit...................................................................................................................................... 23

2.3.6. Power Good (PG).............................................................................................................................. 24

2.3.7. Internal MOSFET Gate Driver ........................................................................................................... 24

3 Application Information ................................................................................................................................... 25

3.1. External Component Selection ................................................................................................................ 25

3.1.1. Inductor Selection ............................................................................................................................. 25

3.1.2. Output Capacitor Selection ............................................................................................................... 26

3.1.3. Input Capacitor Selection .................................................................................................................. 27

3.1.4. Ripple Injection.................................................................................................................................. 27

3.1.5. Setting the Output Voltage ................................................................................................................ 30

3.2. Thermal Measurements ........................................................................................................................... 32

4 Mechanical Specifications .............................................................................................................................. 33

4.1. Package Dimensions ............................................................................................................................... 33

4.2. Recommended Land Pattern................................................................................................................... 34

5 PCB Layout Guidelines .................................................................................................................................. 34

5.1. ZSPM4022-06.......................................................................................................................................... 34

5.2. Input Capacitor ........................................................................................................................................ 35

5.3. Inductor .................................................................................................................................................... 35

5.4. Output Capacitor ..................................................................................................................................... 35

5.5. Optional RC Snubber .............................................................................................................................. 35

6 Ordering Information ...................................................................................................................................... 36

7 Related Documents ........................................................................................................................................ 36

8 Glossary ......................................................................................................................................................... 36

9 Document Revision History ............................................................................................................................ 37

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

Data Sheet

August 29, 2013

4 of 37

ZSPM4022-06

12V/6A Synchronous DC/DC Buck Regulator

List of Figures

Figure 2.1

Figure 2.2

Figure 2.3

Figure 2.4

Figure 2.5

Figure 2.6

Figure 2.7

Figure 3.1

Figure 3.2

Figure 3.3

Figure 3.4

Figure 3.5

Figure 4.1

Functional Diagram ........................................................................................................................... 16

Typical Application Circuit ................................................................................................................. 17

Pin Configuration 28-Pin 5mm



6mm QFN (JL)—Top View ........................................................... 17

ZSPM4022-06 Control Loop Timing –Continuous Mode ................................................................. 21

ZSPM4022-06 Load Transient Response ....................................................................................... 21

ZSPM4022-06 Control Loop Timing –Discontinuous Mode ............................................................ 22

ZSPM4022-06 Current–Limit Foldback Characteristic ..................................................................... 23

Feedback Circuit if Sufficient Ripple is Present at FB for Stable Operation ..................................... 29

Ripple Injection Circuit for Supplementing Inadequate Ripple at FB to Prevent Unstable

Operation .......................................................................................................................................... 29

Ripple Injection Circuit for Preventing Unstable Operation if No Ripple is Present at FB ................ 29

Voltage Divider Configuration ........................................................................................................... 30

Internal Ripple Injection .................................................................................................................... 31

Package Drawing—28-pin 5mm



6mm QFN (JL) Package ........................................................... 33

List of Tables

Table 2.1

Pin Descriptions ................................................................................................................................ 18

Data Sheet

August 29, 2013

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

5 of 37

ZSPM4022-06 Related Products

	ZSPM4022-06	ZSPM4022AA1W06
Description	12V/6A Synchronous DC/DC Buck Regulator	12V/6A Synchronous DC/DC Buck Regulator

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