BD9859EFJ Datasheet, PDF (1/16 Pages) Rohm – Simple Step-down Switching Regulators with Built-in Power MOSFET

Single-chip Type with built-in FET Switching Regulator Series
Simple Step-down
Switching Regulators
with Built-in Power MOSFET
BD9859EFJ
No.10027EAT43
●Summary
Output 3.0A and below High Efficiency Rate Step-down Switching Regulator Power MOSFET Internal Type BD9859EFJ
mainly used as secondary side Power supply, for example from fixed Power supply of 9V, 12V etc, Step-down Output
of 1.2V/1.8V/3.3V/5V, etc, can be produced.
This IC has external Coil/Capacitor down-sizing through 750kHz High Frequency operation, inside Nch-FET SW for 15V
“withstand-pressure” commutation and also, High Speed Load Response through Current Mode Control is a simple
external setting Phase compensation System, through a wide range external constant, a compact Power supply can be
produced easily.
●Features
1)
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3)
4)
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Internal 100 mΩ Nch MOSFET
Output Current 3A
Oscillation Frequency 750kHz
Feedback Voltage 1.0V±1.0%
Internal Soft Start Function
Internal Over Current Protect Circuit, Low Input Error Prevention Circuit, Heat Protect Circuit
ON/OFF Control through EN Pin (Standby Current 0μA Typ.)
Package :HTSOP-J8 Package
●Uses
For Household machines in general that have 9V/12V Lines, etc.
●Operating Conditions (Ta=25℃)
Item
Power supply Voltage
Output Voltage
Symbol
VCC
VOUT
Voltage Range
Unit
5.0～14
V
1.0
V
●Absolute Maximum Rating
Item
Symbol
Rating
Unit
Maximum Application Power supply Voltage
VCC
15
V
Between BST – GND
VBST
22
V
Between BST – Lx
⊿VBST
7
V
Between EN – GND
VEN
15
V
Between Lx – GND
VLx
15
V
Between FB – GND
VFB
7
V
Between VC – GND
VC
7
V
Highside NchFET Drain Current
IDH
3
A
Power Dissipation
Pd
3.76
W
Operating Temperature Range
Topr
-40～+85
℃
Storage Temperature Range
Tstg
-55～+150
℃
Junction Temperature
Tjmax
150
℃
(*1)During mounting of 70×70×1.6t mm 4layer board (Copper area：70mm×70mm).Reduce by 30.08mW for every 1℃ increase. (Above 25℃)
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2010.02 - Rev.A