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www.rohm.com

2010.09 - Rev.A

© 2010 ROHM Co., Ltd. All rights reserved.

Single-chip Type with Built-in FET type Switching Regulators

Flexible Step-down

Switching Regulator

with Built-in Power MOSFET

BD8649EFV

●

Description

The BD8649EFV is a synchronous step-down switching regulator that integrates 2 low resistances N-channel MOSFETs.

It achieves 3A continuous output current over a wide input supply range.

Current mode operation provides fast transient response and easy phase compensation.

●

Feature

1) Synchronous rectification with built-in FET type DC/DC converter

2) 3.0A output current

3) Range of operation power-supply voltage 4.5V～18V

4) Reference voltage FB 0.8V±1%

5) Programmable frequency 100kHz～600kHz

6) Over current protection function

7) Thermal shutdown function

8) Under voltage protection

9) Soft start time out function / Soft start delay circuit

10) Programmable OFFLATCH time

●

Applications

FPD,DVD,HDD Recorder,STB,Amusement,Other

●

Absolute maximum rating (Ta=25℃)

Parameter

Symbol

Ratings

Unit

Input supply voltage

20

V

BOOT terminal voltage

28

V

EN terminal voltage

V

Input terminal voltage

*1

GND-0.3 ～ 7

V

SW terminal voltage

V

Output current

3.5

*2

A

Power dissipation

Pd

3.2

*2

W

Operating temperature

Topr

-20 ～ 85

℃

Storage temperature

Tstg

-55 ～ 150

℃

*2 (70mm×70mm, thickness 1.6mm, and four layer glass epoxy substrates)When mounting substrate and the package

back exposure part are connected with solder

Operating at higher than Ta=25℃, 25.6mW shall be reduced per 1

●

Operation condition

Parameter

Symbol

Ratings

Unit

Min.

Typ.

Max.

Input supply voltage

4.5

-

18.0

V

Output current

-

-

3.0

A

*

This product is not designed for protection against radioactive rays.

No.10027EAT45