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TSZ02201-0J3J0AJ00200-1-2

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02.MAR.2012 Rev.001

TSZ22111･14･001

Datasheet

2.7V to 5.5V, 4A 1ch

Synchronous Buck Converter Integrated FET

BD91361MUV

●General Description

ROHM’s high efficiency step-down switching regulator

BD91361MUV is a power supply designed to produce

a low voltage including 0.8 volts from 5.5/3.3 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/Nch 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 Icc=0µA (Typ.)

●Applications

Power supply for LSI including DSP, Micro computer

and ASIC

●Key Specifications

 Input voltage range:

2.7V to 5.5V

 Output voltage range:

0.8V to 3.3V

 Output current:

4.0A (Max.)

 Switching frequency:

1MHz(Typ.)

 High side FET ON resistance:

60mΩ(Typ.)

 Low side FET ON resistance:

55mΩ(Typ.)

 Standby current:

0μA (Typ.)

 Operating temperature range:

-40℃ to +105℃

●Package

Typ.)

(Typ.)

(Max.)

VQFN020V4040:

4.00mm x 4.00mm x 1.00mm

●Typical Application Circuit

Fig.1 Typical Application Circuit

GND,PGND

SW

PVCC

EN

ADJ

ITH

VCC

VOUT

Cin

RITH

CITH

L

ESR

CO

RO

VOUT

CBST

VCC

Cf

Rf

VID<1> VID<0>

VCC

VCC

R2

R1

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

VQFN020V4040