ZSPM4022-06

12V/6A Synchronous DC/DC Buck Regulator

Data Sheet

August 29, 2013

© 2013 Zentrum Mikroelektronik Dresden AG

— Rev. 1.00

All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the

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

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List of Figures

Figure 2.1

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

Figure 2.2

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

Figure 2.3

Pin Configuration 28-Pin 5mm

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

Figure 2.4

ZSPM4022-06 Control Loop Timing

–Continuous Mode................................................................. 21

Figure 2.5

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

Figure 2.6

ZSPM4022-06 Control Loop Timing

–Discontinuous Mode ............................................................ 22

Figure 2.7

ZSPM4022-06 Current

–Limit Foldback Characteristic ..................................................................... 23

Figure 3.1

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

Figure 3.2

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

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

Figure 3.3

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

Figure 3.4

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

Figure 3.5

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

Figure 4.1

Package Drawing

—28-pin 5mm

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

List of Tables

Table 2.1

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