BD9305AFVM Datasheet, PDF (1/15 Pages) Rohm – Single-output Step-up,High-efficiency Switching Regulator(Controller Type)

Large Current External FET Controller Type Switching Regulators
Single-output Step-up,High-efficiency
Switching Regulator(Controller Type)
BD9306AFVM
Single-output Step-up,High-efficiency
Switching Regulator(Controller Type)
BD9305AFVM
No.09028EAT04
Description
BD9305AFVM / BD9306AFVM are 1-channel DC/DC converter controllers. Step-down DC/DC converter can be configured
by BD9305AFVM, and Step-up DC/DC converter can be configured by BD9306AFVM. In addition, the master slave function,
which is that the synchronization is possible at the time of multi-connection, is mounted.
Features
1) 1ch PWM Control DC/DC Converter Controller
2) Input Voltage Range:4.2 to 18V
3) Feed Back Voltage:1.25±1.6%
4) Oscillating Frequency Variable:100 to 800kHz
5) Built-in Soft Start Function
6) Standby Current of 0 A (Typ.)
7) Built-in Master / Slave Function
8) Protection Circuit : Under Voltage Lockout Protection Circuit
Thermal Shutdown Circuit
Short Protection Circuit of Timer Latch type
9) MSOP8 Package
Applications
・TV, Power Supply for the TFT-LCD Panels used for LCD TVs, Back Lights
・DSC, DVC, Printer, DVD ,DVD Recorder, Generally Consumer Equipments etc.
Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limit
Unit
Power supply voltage**
Vcc
20
V
Power dissipation
Pd
588*
mW
Operating temperature range
Topr
-40 to +85
℃
Storage temperature range
Tstg
-55 to +150
℃
Maximum junction temperature
Tjmax
150
℃
* Reduced by 4.7 mW/°C over 25°C, when mounted on a glass epoxy 4-layer board (70 mm  70 mm  1.6 mm)
** Must not exceed Pd.
Recommended Operating Ranges (Ta=-40℃ to +85℃)
Parameter
Limit
Symbol
Unit
Min
Typ
Max
Power supply voltage
Vcc
4.2
12
18
V
Control Voltage
Timing Capacity
V_ENB
－
－
Vcc
V
CT
100
－
1000
pF
Timing Resistance
RT
5
－
50
kΩ
Oscillating frequency
Fosc
100
－
800
kHz
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
1/14
2009.05 - Rev.A