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02.MAR.2012 Rev.001

www.rohm.com

TSZ02201-0J3J0AJ00080-1-2

©2011 ROHM Co., Ltd. All rights reserved.

TSZ22111･14･001

4.0V(or 4.5V) to 5.5V, 0.8A 1ch

Synchronous Buck Converter Integrated FET

BD9102FVM

BD9104FVM

BD9106FVM

●General Description

ROHM’s high efficiency step-down switching

regulator (BD9102FVM, BD9104FVM, BD9106FVM)

is a power supply designed to produce a low voltage

including 1.24 volts from 5 volts power supply line.

Offers high efficiency with our original pulse skip

control technology and synchronous rectifier.

Employs a current mode control system to provide

faster transient response to sudden change in load.

●Features

 Offers fast transient response with current mode

PWM control system.

 Offers highly efficiency for all load range with

synchronous rectifier (Nch/Pch FET)

and SLLM

 Incorporates soft-start function.

 Incorporates thermal protection and ULVO

functions.

 Incorporates short-current protection circuit with

time delay function.

 Incorporates shutdown function

●Typical Application Circuit

●Key Specifications

 Input voltage range

BD9102FVM , BD9106FVM:

4.0V to 5.5V

BD9104FVM

4.5V to 5.5V

 Output voltage range

BD9102FVM:

1.24V ± 2%

BD9104FVM:

3.30V ± 2%

BD9106FVM:

1.20V to 2.50V

 Output current:

0.8A(Max.)

 Switching frequency:

1.0MHz(Typ.)

 Pch FET ON resistance:

350mΩ(Typ.)

 Nch FET ON resistance:

250mΩ(Typ.)

 Standby current:

0

μA(Max.)

 Operating temperature range:

-25℃ to +85℃

●Package

MSOP8:

2.90 mm x 4.00 mm x 0.83 mm

●Applications

Power supply for HDD, power supply for portable

electronic devices like PDA, and power supply for LSI

including CPU and ASIC

GND,PGND

SW

EN

ITH

Cin

L

ESR

Fig.1 Typical Application Circuit

○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays.