ZSPM1035C / ZSPM1035D

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

Data Sheet

December 3, 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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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 I2C™ ....................................................................................................... 20

4

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

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

4.2. Pin Strap Options of the ZSPM1035C/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 ZSPM1035C and ZSPM1035D......................................... 28

4.3.1. Typical Load Transient Response – ZSPM1035C – Capacitor Range #1 – Comp0........................ 29

4.3.2. Typical Load Transient Response – ZSPM1035C – Capacitor Range #2 – Comp1........................ 30

4.3.3. Typical Load Transient Response – ZSPM1035C – Capacitor Range #3 – Comp2........................ 31

4.3.4. Typical Load Transient Response – ZSPM1035C – Capacitor Range #4 – Comp3........................ 32

4.3.5. Typical Load Transient Response – ZSPM1035D – Capacitor Range #1 – Comp0........................ 33

4.3.6. Typical Load Transient Response – ZSPM1035D – Capacitor Range #2 – Comp1........................ 34