MB39C007 datasheet(2/41 Pages) CYPRESS

2 / 41 page

Document Number: 002-08228 Rev. *C

Page 2 of 41

MB39C007

Contents

Description ................................................................... 1

Features ....................................................................... 1

Applications ................................................................. 1

1. Pin Assignment ...................................................... 3

2. Pin Descriptions ..................................................... 4

3. I/O Pin Equivalent Circuit Diagram ....................... 5

4. Block Diagram ........................................................ 6

4.1 Current mode ...................................................... 7

5. Function Of Each Block ......................................... 8

6. Absolute Maximum Ratings ................................ 10

7. Recommended Operating Conditions ................ 11

8. Electrical Characteristics .................................... 12

9. Test Circuit for Measuring Typical Operating

Characteristics ....................................................... 14

10. Application Notes ............................................... 15

10.1 Selection of Components ................................ 15

10.2 Output voltage setting ..................................... 16

10.3 About Conversion Efficiency ........................... 17

10.4 Power Dissipation and Heat

Considerations ...................................................... 17

10.5 XPOR Threshold Voltage Setting [VPORH,

VPORL] ................................................................. 18

10.6 Transient Response ........................................ 19

10.7 Board Layout, Design Example ...................... 19

11. Example Of Standard Operation

Characteristics........................................................ 21

11.1 Characteristics CH1 ............................................. 21

11.2 Switching Waveform ....................................... 29

11.3 Output Waveforms at Sudden Load Changes 30

11.4 CTL Start-up Waveform .................................. 31

11.5 CTL Stop Waveform ....................................... 33

11.6 Current Limitation Waveform .......................... 33

11.7 Voltage Detection Waveform .......................... 34

11.8 Waveform of Dynamic Output Voltage

Transition (VO1 1.8 V←→ 2.5 V) ........................ 34

12. Application Circuit Examples ........................... 35

12.1 Application Circuit Example 1 ......................... 35

12.2 Application Circuit Example 2 ......................... 36

12.3 Application Circuit Example Components List 37

13. Usage Precautions ............................................. 38

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

15. RoHS Compliance Information ......................... 38

16. Package Dimension ........................................... 39

Document History ..................................................... 40

Sales, Solutions, and Legal Information ................. 41

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