Contents

1

Typical application circuit and block diagram ......................................2

1.1

Application circuit .............................................................. 2

1.2

Block diagram ................................................................. 2

2

Pin description and connection diagram ...........................................3

2.1

Thermal data .................................................................. 3

3

Electrical specifications ...........................................................4

3.1

Absolute maximum ratings....................................................... 4

3.2

Electrical characteristics......................................................... 5

4

Device description.................................................................6

5

Driver section .....................................................................7

5.1

Power dissipation .............................................................. 7

6

Soft-start and disable ..............................................................8

6.1

Low-side-less startup (LS-less) ................................................... 8

6.2

Enable/ disable ................................................................ 9

7

Overcurrent protection ...........................................................10

7.1

Overcurrent threshold setting ................................................... 10

8

Output voltage monitor and protections...........................................11

8.1

Undervoltage protection ........................................................ 11

8.2

Overvoltage protection ......................................................... 11

8.3

Feedback disconnection protection............................................... 11

8.4

Undervoltage lock out .......................................................... 11

9

Application details................................................................12

9.1

Output voltage selection........................................................ 12

9.2

Compensation network......................................................... 12

9.3

Layout guidelines ............................................................. 14

10

Application information ...........................................................16

10.1

Output inductor ............................................................... 16

10.2

Output capacitors ............................................................. 17

10.3

Input capacitors ............................................................... 17

11

Package information..............................................................18

11.1

SO-8 package information ...................................................... 18

12

Ordering information .............................................................21

Revision history .......................................................................22

A6727B

Contents

DS14159 - Rev 2

page 23/26