BD9006F Просмотр технического описания (PDF) - ROHM Semiconductor

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BD9006F

Flexible Step-down Switching Regulators with Built-in Power MOSFET

ROHM Semiconductor 

BD9006F, BD9006HFP, BD9007F, BD9007HFP

Technical Note

●Block Diagrams / Application circuit / PIN assignment

(BD9006F,BD9007F)

(BD9006HFP,BD9007HFP)

PVIN

１

GND EN/SYNC

VIN RT

SW INV

PVIN FB

VIN

８

+

220μF 2μF

SOFT

START

VREG

Internal

Bias

INV

４

22000pF

ERROR AMP

-

+

+

PWM

COMPARATOR

-

+

0.8V

Slope

SYNC

+

-

CURRENT LIMIT

SDWN

Reset

DRV

Set

DRIVER

SDWN

30 KΩ

FB

３

OSC

６

RT

UVLO/

TSD

EN/SYNC

５

5V

SW 33μH

Vo

２

+

330μF

７ GND

47kΩ

51 KΩ

15 KΩ

Fig.19

VIN

１

+

220μF 2μF

SOFT

START

Vref

Internal

Bias

SYNC

+

INV

５

22000pF

ERROR AMP

-

+

+

PWM

COMPARATOR

-

+

0.8V

Slope

-

CURRENT LIMIT

SDWN

Reset

DRV

Set

DRIVER

SDWN

30 KΩ

VIN FB INV EN/SYNC

SW GND RT

FB

３

OSC

６

RT

51 KΩ

UVLO/

TSD

EN/SYNC

７

5V

SW

２

33μH

Vo

+

GND

４

330μF

47 KΩ

15 KΩ

Fig.20

No. Pin name

Function

1

PVIN Power system power supply input

2

SW Output

3

FB Error Amp output

4

INV Output voltage feedback

5 EN/SYNC Enable/Synchronizing pulse input

6

RT Frequency setting resistor connection

7

GND Ground

8

VIN Power supply input

*VIN and PVIN must be shorted before use

No. Pin name

Function

1

VIN Power supply input

2

SW Output

3

FB Error Amp output

4

GND Ground

5

INV Output voltage feedback

6

RT Frequency setting resistor connection

7 EN/SYNC Enable/Synchronizing pulse input

FIN

-

Ground

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© 2009 ROHM Co., Ltd. All rights reserved.

7/17

2009.05 - Rev.A

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