BD9040FV_09 Datasheet, PDF (1/19 Pages) Rohm – Step-down,High-efficiency Switching Regulators (Controller type)

Large Current External FET Controller Type Switching Regulators
Step-down,High-efficiency
Switching Regulators (Controller type)
BD9040FV,BD9045FV
No.09028EAT03
●Over View
BD9040FV(output type of 1ch) and BD9045FV(output type of 2ch) are switching controllers that can be used within the wide
range of the input.Highly effective can be achieved by the synchronous rectification method and it is possible to contribute to
the eco-design of all electronic equipment (energy-saving).
●Feature(BD9040FV，BD 9045FV)
1) Wide input voltage range：4.5V～18V
2) Reference voltage 0.9V±1%
3) The overcurrent of timer latch type, excess voltage, short, and RTO/S protection are built-in
4) The switching frequency is changeable.(200kHz～750kHz)
5) A ceramic capacitor can be used for the output.
●Applications
For thin television, DVDï½¥HDD recorder , STB, amusement and others.
●Absolute maximum rating (Ta=25℃)
Parameter
Power-supply voltage
EN input voltage
SW voltage
Voltage between BOOT-SW
Permissible loss 1
Permissible loss 2
Range of operating temperature
Storage temperature range
Junction temperature
** Ta=25℃ or more is reduced with 6.5mW/℃.
*** Ta=25℃ or more is reduced with 7.5mW/℃.
Symbol
Vcc
V_EN
V_SW
V_BOOT
Pd1
Pd2
Topr
Tstg
Tjmax
Rating
Unit
20
V
20
V
Vcc
V
6
V
0.81** (BD9040FV)
W
0.94*** (BD9045FV)
W
-40～+85
℃
-55～+150
℃
150
℃
●Operation condition (Ta=-40℃～+85℃)
Parameter
Symbol
Min
Power supply voltage***
Vcc
4.5
Timing resistance
RT
39
Frequency of oscillator
Fosc
200
*** Please be short-circuited to use VREG5 and VCC when the Vcc is 6V or less.
○ The radiation design is not done.
Limit
Typ
12
－
－
Max
Unit
18
V
130
kΩ
750
kHz
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2009.05 - Rev.A