Contents

1

Block diagram and pin connection .................................................2

2

Maximum ratings ..................................................................4

3

Typical application schematic......................................................5

4

Electrical characteristics...........................................................6

5

Operation description..............................................................9

5.1

Drain voltage sensing .......................................................... 10

5.2

Turn-on ...................................................................... 10

5.3

Minimum TON programming..................................................... 10

5.4

Adaptive turn-off and TIMER .................................................... 10

5.4.1

Fixed frequency mixed DCM/CCM operation .................................. 11

5.4.2

QR operation (with valley skipping) .......................................... 12

5.4.3

Fixed frequency DCM operation ............................................ 12

5.4.4

Variable frequency CCM operation .......................................... 13

5.5

Minimum TOFF programming .................................................... 13

5.6

Start-up phase ................................................................ 14

5.7

Low consumption mode operation: sleep-mode, burst mode, disable state ............. 14

5.8

DIS/SYNC pin functions ........................................................ 15

5.9

VAUX pin operation in CC regulation ............................................. 15

5.9.1

Example for parameter calculations ......................................... 16

5.10

Operation in CC regulation and short circuit ....................................... 18

5.11

Adaptive gate drive ............................................................ 18

6

Layout guidelines.................................................................20

7

Package mechanical data .........................................................21

Revision history .......................................................................23

SRK1001

Contents

DS13155 - Rev 1

page 24/27