BD9851EFV Datasheet, PDF (1/3 Pages) Rohm – 2ch switching regulator controller

03W209A
2ch switching regulator controller
BD9851EFV
Description
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.
Dimension (Unit : mm)
7.8 ± 0.1
24
13
4
+6
-4
0.325 ¹
12
0.17
+0.05
+0.03
Features
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
0.65
0.08 S
0.2 +0.05
-0.04
0.08 M
HTSSOP-B20
Applications
TFT panel, TA/router, digital household appliances
Absolute Maximum Ratings (Ta=25˚C)
Parameter
Symbol
Limits
Unit
Power supply voltage
Vcc
Power dissipation
Pd
20
V
1000 ^∗
mW
Operating temperature range
Topr
–40 ~ +85
˚C
Storage temperature range
Tstg
–55 ~ +150
˚C
*Derating : 8.0mW/˚C for operation above Ta=25˚C
Recommended Operating Conditions (Ta=25˚C)
Parameter
Symbol Min. Typ. Max. Unit
Power supply voltage
VCC
4
12
18
V
Oscillating frequency
fOSC
10
300 3000 kHz
February, 2004