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2011.08 - Rev.D

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Single-chip Type with Built-in FET Switching Regulators

High-efficiency Step-up

Switching Regulator

with Built-in Power MOSFET

BD8314NUV

●

Description

ROHM’s High-efficiency Step-up Switching Regulator Built-in Power MOSFET BD8314NUV generates step-up output

including 8 V or 10 V from 4 batteries, batteries such as Li1cell or Li2cell etc. or a 5 V fixed power supply line.

This IC allows easy production of small and a wide range of output current, and is equipped with an external coil/capacitor

downsized by high frequency operation of 1.2 MHz, built-in 2.5 A rated 80 mΩ Nch FET SW, and flexible phase

compensation system on board.

●

Features

1) Incorporates Nch FET capable of withstanding 2.5 A/14 V.

2) Incorporates phase compensation device between input and output of ERROR AMP.

3) Small coils and capacitors to be used by high frequency operation of 1.2 MHz

4) Input voltage 3.0 V ~ 12 V

5) Output current

600 mA (3.5 V ~ 10 V) at 10 V

600 mA (3.0 V ~ 8 V) at 8 V

6) Incorporates soft-start function.

7) Incorporates timer latch system short protecting function.

8) As small as 3 mm×3 mm, SON 10-pin package

VSON010V3030

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Application

General portable equipment like DSC/DVC powered by 4 dry batteries or Li2cell

●

Absolute Maximum Ratings

Parameter

Symbol

Ratings

Unit

Maximum applied power voltage

VCC, LX

14

V

Maximum input voltage

SWOUT, INV

14

V

Maximum input current

Iinmax

2.5

A

Power dissipation

Pd

700*

mW

Operating temperature range

Topr

-25 to +85

°C

Storage temperature range

Tstg

-55 to +150

°C

Junction temperature

Tjmax

+150

°C

* When used at Ta = 25°C or more installed on a 74.2 × 74.2 × 1.6

●

Operating Conditions (Ta = 25°C)

Parameter

Symbol

Ratings

Unit

Power supply voltage

VCC

3.0 to 12

V

Output voltage

VOUT

4.0 to 12

V

No.11027EDT09