Description

Features

Applications

Dimension (Unit : mm)

*Derating : 8.0mW/˚C for operation above Ta=25˚C

February, 2004

03W209A

12

4

18

V

300

10

3000

kHz

Recommended Operating Conditions (Ta=25˚C)

Parameter

Min.

Max.

Unit

Typ.

Symbol

HTSSOP-B20

12

13

24

1

0.08 S

+0.05

+6

-4

+0.03

+0.05

-0.04

7.8

± 0.1

4

0.17

0.65

0.2

0.325

Absolute Maximum Ratings (Ta=25˚C)

Power dissipation

Operating temperature range

Storage temperature range

Parameter

Symbol

Limits

Unit

Pd

Topr

Tstg

20

1000

+85

–40

~

+150

–55

~

mW

˚C

˚C

Power supply voltage

Power supply voltage

Oscillating frequency

Vcc

V

∗

BD9851EFV

2ch switching regulator controller

BD9851EFV is a 2 channel DC/DC switching regulator

controller. Switching of step-down and step-up for

channel1 can be managed by setting pin. Channel 2 is

available for step-down and inversion, suitable for various

applications. This IC is available for 3MHz of switching

frequency by high-speed driver technology and provides

power configuration with space saving.

1) Built-in 2 channels for switching of step-down/step-up

and step-down/inversion

2) FET (Nch/Pch) direct drive

3) 3MHz switching frequency available (Variable externally)

4) Power package of HTSSOP-B20

5) Built-in standby function

TFT panel, TA/router, digital household appliances