10

NN30312A

Ver. CEB

FUNCTIONAL BLOCK DIAGRAM

Notes) This block diagram is for explaining functions. Part of the block diagram may be omitted, or it may be simplified.

Control

Logic

Soft-Start

VIN

0.6 V

VREF

HGATE

UVLO

SCP

OCP

TSD

REF

ON

CMP

Toff

Timer + Comp

Ton

Timer + Comp

FCCM

/ Skip

0.6 V + 15 %

0.6 V – 15 %

Aux

Timer

Coast

Fault

VREG : 5.5 V

ON / OFF

Soft-Start

SS

VREG

BGR

VINT

VBG

EN

HPD

HGO

LPD

LGO

LGATE

VREG

VOUT

VFB

FSEL

MODE

VREG

AGND

SS

AVIN

PGOOD

BST

LX

PGND

PVIN

35,36,37,38,39,40,42

31

33

1,2,3,4,5,6,7,8,43

9,10,11,12,13,14,15,16,17

19,32,41

18

26

27

25

23

24

28

20