ZSPM4022AA1W12 datasheet, PDF - EEWORLD Datasheet

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ZSPM4022AA1W12: Descriptionvoltage regulators - switching regulators; Categorysemiconductor Other integrated circuit (IC); File Size2MB，37 Pages; ManufacturerZentrum Mikroelektronik Dresden AG (IDT); Environmental Compliance

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ZSPM4022AA1W12 Overview

voltage regulators - switching regulators

ZSPM4022AA1W12 Parametric

Parameter Name	Attribute value
Manufacture	ZMDI
Product Category	Voltage Regulators - Switching Regulators
RoHS	Yes
Input Voltage MAX	19 V
Switching Frequency	600 kHz
Output Voltage	800 mV to 5.5 V
Output Curre	12 A
Number of Outputs	1 Outpu
Maximum Operating Temperature	+ 125 C
Mounting Style	SMD/SMT
Package / Case	QFN-28
Input Voltage MIN	4.5 V
Load Regulati	0.25 %
Minimum Operating Temperature	- 40 C
Packaging	Reel
Supply Curre	450 uA
Topology	Buck
Type	Synchronous DC/DC Buck Regul

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Data Sheet

Rev. 1.00 / September 2013

ZSPM4022-12

12V/12A Synchronous DC/DC Buck Regulator

Analog ICs

Powerful

and Determined

ZSPM4022-12

12V/12A 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).............................................................................................................................. 23

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.................................................................................................................................. 28

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. ZSPM4022-12.......................................................................................................................................... 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

September 17, 2013

4 of 37

ZSPM4022-12

12V/12A 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

ZSPM4022-12 Control Loop Timing –Continuous Mode ................................................................. 21

ZSPM4022-12 Load Transient Response ....................................................................................... 21

ZSPM4022-12 Control Loop Timing –Discontinuous Mode ............................................................ 22

ZSPM4022-12 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

September 17, 2013

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

5 of 37

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