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Date: 8/4/04

SP6134H High Voltage, 600KHz Synchronous PWM Controller

© Copyright 2004 Sipex Corporation

SP6134H

FEATURES

■ 3V to 28V Step Down Achieved Using Dual Input

■ Small 10-Pin MSOP Package

■ 2A to 15A Ouput Capability

■ Highly Integrated Design, Minimal Components

■ Short Circuit Protection with Auto-Restart

■ On-Board 1.5Ω sink (2Ω source) NFET Drivers

■ Programmable Soft Start

■ Fast Transient Response

■ High Efficiency: Greater than 94% Possible

■ A Synchronous Start-Up into a Pre-Charged Output

High Voltage, 600 KHz Synchronous PWM Controller

DESCRIPTION

The SP6134H is a high voltage, synchronous step-down switching regulator controller optimized for high efficiency.

The part is designed to be especially attractive for dual supply, 12V step down with 5V used to power the controller.

NFETs using a fixed 600kHz frequency, PWM voltage mode architecture. Protection features include UVLO, thermal

shutdown and output short circuit protection. The SP6134H is available in the cost and space saving 10-pin MSOP

.

®

Preliminary

TYPICAL APPLICATION CIRCUIT

APPLICATIONS

■ Wireless Base Station

■ Automotive

■ Industrial

■ Power Supply

GL

GND

COMP

SP6134H

10 Pin MSOP

1

2

3

4

5

10

9

8

7

6

BST

GH

SWN

SS

UVIN

8 7 6 5

1 2 3

4

CSS

47nF

CBST

1µF

FDS6676S

14.5A, 6.0mΩ

C3

47µF

6.3V

R1

68.1k, 1%

0.8V - 3.3V

0 - 10 A

R2

21.5k, 1%

10µF

6.3V

R3

221k, 1%

R4

100k, 1%

CF1

100pF

CZ2

820pF

CP1

56pF

fs=600Khz

RZ2

40.2k, 1%

FDS6676S

14.5A, 6mΩ

8 7 6 5

4

1 2 3

DBST

MBR0530

SP6134H

1

2

3

4

5

10

9

8

7

6

VCC

GL

GND

VFB

COMP

BST

GH

SWN

SS

UVIN

GND 3

RLF

3.0,5%

U1

Ceramic

8050

X5R

QT

SS

GND2

C3, C4

Ceramic

1210

X5R

C4

47µF

6.3V

RZ3

4.64k, 1%

CZ3

220pF

C1

22µF

16V

C2

22µF

16V

GND

VIN

3.5V - 15V

C1, C2

Ceramic

1210

X5R

V

OUT

=(R1/R2 +1)V

FB

R5

Bead

QB

= 5V @ 30mA

0.8V

Now Available in Lead Free Packaging