Contents

1

Application schematic .............................................................2

2

Pin connections ...................................................................3

3

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

4

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

5

Block diagram .....................................................................6

6

Functional description .............................................................7

6.1

EN ........................................................................... 7

6.2

Soft-start...................................................................... 7

6.3

Light-load operation ............................................................ 7

6.3.1

Low consumption mode (LCM) .............................................. 7

6.3.2

Low noise mode (LNM) .................................................... 8

6.4

Dithering ...................................................................... 8

6.5

Duty cycle range ............................................................... 9

6.6

Overcurrent protection .......................................................... 9

6.7

Overvoltage protection ......................................................... 10

6.8

Thermal shutdown............................................................. 10

7

Application information ...........................................................11

7.1

Typical application............................................................. 11

7.2

Output voltage setting.......................................................... 11

7.3

Input capacitor selection........................................................ 11

7.4

Inductor selection ............................................................. 12

7.5

Output capacitor selection ...................................................... 13

7.6

Board layout guidelines ........................................................ 13

8

Typical performance characteristics ..............................................15

9

Package information..............................................................16

9.1

SOT23-6L package information.................................................. 17

9.2

SOT23-6L package information.................................................. 20

10

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

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

DCP3601

Contents

DS14782 - Rev 1

page 23/26