Description
Features
Applications
Dimension (Unit : mm)
*Derating : 8.0mW/˚C for operation above Ta=25˚C
February, 2004
03W209A
VCC 124 18 V
fOSC 30010 3000 kHz
Recommended Operating Conditions (Ta=25˚C)
Parameter Min. Max. UnitTyp.Symbol
HTSSOP-B20
12
1324
1
0.08 M
0.08 S
+0.05
+6
-4
+0.03
+0.05
-0.04
7
.
6

–

0
.
2
1
.
0
M
a
x
.
7.8 – 0.1
4
0.17
0.65
0.2
0.325
0
.
5
3

–

0
.
1
5
0
.
8
5

–

0
.
0
5
0
.
0
8

–

0
.
0
5
0
.
0
8

–

0
.
0
5
1

–

0
.
2
5
.
6

–

0
.
1
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