BD9845FV Datasheet, PDF (1/16 Pages) Rohm – Single/Dual-output High-frequency Step-down Switching Regulator(Controller type)

Large Current External FET Controller Type Switching Regulators
Single/Dual-output
High-frequency Step-down
Switching Regulator(Controller type)
BD9845FV
No.09028EAT08
●Overview
BD9845FV is an IC containing a circuit of switching regulator controller by pulse width modulation system.
This circuit can be used for step-down DC/DC converter operation.
In addition, the package is designed compact, and is optimum for compact power supply for many kinds of equipment.
●Feature
1) High voltage resistance input (Vcc=35V)
2) FET driver circuit is contained (step-down circuit 1 output).
3) Error amplifier reference voltage (1.0V1%) and REG output circuit (2.5V) are contained.
4) Overcurrent detection circuit is contained.
5) Soft start and pause period can be adjusted.
6) Three modes of standby, master, and slave can be switched. (iccs = 0 uA typ in standby mode.)
7) ON/OFF control is enabled independently for each channel. (DT terminal)
●Application
LCD, PDP, PC, AV, Printer, DVD, Projector TV, Fax, Copy machine, Measuring instrument, etc.
●Absolute maximum rating
Item
Symbol
Rating
Unit
Supply voltage
Vcc
36
V
Permissible loss
Pd
500^＊1
mW
OUT terminal voltage resistance
OUT
Vcc-7V to Vcc
V
C5V terminal voltage resistance
C5V
Vcc-7V to Vcc
V
Operation temperature range
Topr
-40 to +85
°C
Storage temperature range
Tstg
-55 to +150
°C
Joint temperature
Tjmax
150
°C
*1 When glass epoxy board 70.0 mm  70.0 mm  1.6 mm is installed onboard. Reduced by 4.0 mW/C above Ta=25C.
●Operating condition (Ta=25C)
Item
Supply voltage
Output terminal voltage
Timing capacity
Oscillation frequency
STB input voltage
SEL input voltage
Symbol
Range
Unit
Vcc
3.6 to 35
V
OUT
C5V – Vcc
V
CCT
47 to 3000
pF
Fosc
100 to 1500
kHz
VSTB
0 to Vcc
V
VSELTB
0 to Vcc
V
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2009.05 - Rev.A