CS51033GD8 View Datasheet(PDF) - ON Semiconductor

Part Name

Description

MFG CO.

CS51033GD8

Fast P−Ch FET Buck Controller

ON Semiconductor 

1 2 3 4 5 6 7 8 9 10

PACKAGE PIN DESCRIPTION

Pin Number

Pin Symbol

1

VGATE

2

PGND

3

COSC

4

GND

5

VFB

6

VCC

7

CS

8

VC

CS51033

Function

Driver pin to gate of external P−Ch FET.

Output power stage ground connection.

Oscillator frequency programming capacitor.

Logic ground.

Feedback voltage input.

Logic supply voltage.

Soft−Start and fault timing capacitor.

Driver supply voltage.

COSC

VCC

IC

7IC

1.5 V

VCC

VCC

IT

CS

IT

55

G3

IT

5

1.5 V

Oscillator

+ Comparator

A1

−

G1

2.5 V

VC

RG

VGATE

Flip−Flop

RQ

F2

G2 S Q

VFB

Comparator

A6

1.25 V

VGATE

PGND

VFB

0.7 V

Hold Off

Comp

Fault

Comp 1.15 V

G4

CS

+ Comparator

A2

−

RQ

F1

2.5 V

2.4 V

G5

SQ

Slow Discharge

Flip−Flop

−

A3

+ Slow Discharge

Comparator

CS Charge

Sense

Comparator

A4

2.3 V

GND

Figure 2. Block Diagram

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