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BD8961NV

Low Noise High Efficiency Step-down Switching Regulator with Built-in Power MOSFET

ROHM Semiconductor 

Single-chip Type with Built-in FET Switching Regulator Series

Low Noise High Efficiency

Step-down Switching Regulator

with Built-in Power MOSFET

BD8961NV

No.10027EBT22

●Description

ROHM’s high efficiency step-down switching regulator BD8961NV is a power supply designed to produce a low voltage

including 3.3 volts from 5 volts power supply line. Offers high efficiency with synchronous rectifier. Employs a current mode

control system to provide faster transient response to sudden change in load.

●Features

1) Offers fast transient response with current mode PWM control system.

2) Offers highly efficiency for all load range with synchronous rectifier (Nch/Pch FET)

3) Incorporates soft-start function.

4) Incorporates thermal protection and ULVO functions.

5) Incorporates short-current protection circuit with time delay function.

6) Incorporates shutdown function

7) Employs small surface mount package : SON008V5060

●Use

Power supply for LSI including DSP, Micro computer and ASIC

●Line up

Parameter

Symbol

Ratings

Unit

VCC Voltage

PVCC Voltage

VCC

-0.3～+7 ＊1

V

PVCC

-0.3～+7 ＊1

V

EN Voltage

VEN

-0.3～+7

V

SW,ITH Voltage

Power Dissipation 1

Power Dissipation 2

VSW,VITH

-0.3～+7

V

Pd1

900＊2

mW

Pd2

3900＊3

mW

Operating temperature range

Topr

-25～+105

℃

Storage temperature range

Tstg

-55～+150

℃

Maximum junction temperature

Tjmax

+150

℃

＊1 Pd should not be exceeded.

＊2 Derating in done 7.2mW/℃ for temperatures above Ta=25℃, Mounted on 70mm×70mm×1.6mm Glass Epoxy PCB (the density of copper:3%)

＊3 Derating in done 31.2mW/℃ for temperatures above Ta=25℃, Mounted on JESD51-7.

●Operating Conditions (Ta=25℃)

Parameter

VCC Voltage

PVCC Voltage

EN Voltage

SW average output current

＊4 Pd should not be exceeded.

Symbol

Ratings

Unit

Min.

Typ.

Max.

VCC *4

4.5

5.0

5.5

V

PVCC *4

4.5

5.0

5.5

V

VEN

0

Isw *4

-

-

VCC

V

-

2.0

A

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

1/13

2010.04 - Rev.B

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