UCC27531, UCC27533, UCC27536, UCC27537, UCC27538

SLUSBA7F – DECEMBER 2012 – REVISED JULY 2015

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Table of Contents

9.2

Functional Block Diagrams ..................................... 16

1

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

9.3

Feature Description................................................. 18

2

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

9.4

Device Functional Modes........................................ 21

3

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

10

Applications and Implementation...................... 23

4

Revision History..................................................... 2

10.1

Application Information.......................................... 23

5

Description (continued)......................................... 4

10.2

Typical Application ................................................ 24

6

Device Comparison Table..................................... 4

11

Power Supply Recommendations ..................... 32

7

Pin Configuration and Functions ......................... 5

12

Layout................................................................... 32

8

Specifications......................................................... 6

12.1

Layout Guidelines ................................................. 32

8.1

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

12.2

Layout Example .................................................... 33

8.2

ESD Ratings.............................................................. 6

12.3

Thermal Consideration.......................................... 33

8.3

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

13

Device and Documentation Support ................. 34

8.4

Thermal Information .................................................. 7

13.1

Related Links ........................................................ 34

8.5

Electrical Characteristics........................................... 7

13.2

Trademarks ........................................................... 34

8.6

Switching Characteristics .......................................... 8

13.3

Electrostatic Discharge Caution ............................ 34

8.7

Timing Diagrams ....................................................... 9

13.4

Glossary ................................................................ 34

8.8

Typical Characteristics ............................................ 10

14

Mechanical, Packaging, and Orderable

9

Detailed Description ............................................ 15

Information ........................................................... 34

9.1

Overview ................................................................. 15

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision E (July 2014) to Revision F

Page

•

Changed EN for UCC27531 From: Yes To: Yes / No in Device Comparison Table ............................................................ 4

•

Changed OUTPUT for UCC27531 From: Split To: Split / SingleDevice Comparison Table ................................................. 4

•

Added the 8-Pin SOIC package to the Pin Configuration and Functions section .................................................................. 5

•

Added UCC27531D to the Pin Functions table ..................................................................................................................... 6

•

Changed PMOS Symbol in Figure 32 ................................................................................................................................. 16

•

Changed PMOS and Logic Symbol in Figure 33 ................................................................................................................ 16

•

Changed PMOS and Logic Symbols in Figure 34................................................................................................................ 16

•

Changed PMOS and Logic Symbol in Figure 35 ................................................................................................................. 17

•

Changed PMOS Symbol in Figure 36 .................................................................................................................................. 17

•

Added Figure 37 .................................................................................................................................................................. 18

•

Changed PMOS Symbol in Figure 39 ................................................................................................................................. 20

•

Changed Enable Pin Column to Table 3 .............................................................................................................................. 21

•

Added Table 6 ..................................................................................................................................................................... 22

Changes from Revision D (April 2013) to Revision E

Page

•

Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional

Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device

and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1

Changes from Revision C (April 2013) to Revision D

Page

•

Added Startup Current UCC27537 Bias Current Parameters to the ELECTRICAL CHARACTERISTICS............................ 7

•

Added UCC27531 Start-Up Current vs. Temperature TYPICAL CHARACTERISTICS diagram. ...................................... 11

•

Added UCC27537 Start-Up Current vs. Temperature TYPICAL CHARACTERISTICS diagram. ...................................... 11

2

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