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www.rohm.com
2009.09 - Rev.C
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c
2009 ROHM Co., Ltd. All rights reserved.
Single-chip Type with Built-in FET Switching Regulator Series
High-efficiency Step-up/down
Switching Regulator
with Built-in Power MOSFET
BD8301MUV
●General Description
ROHM’s highly-efficient step-up/down switching regulator BD8301MUV produces step-up/down output including 3.3 V from
1 cell of lithium battery with just one coil.
This IC adopts an original step-up/down drive system and creates a higher efficient power supply than conventional
Sepic-system or H-bridge system switching regulators.
●Features
1) Highly-efficient step-up/down DC/DC converter to be constructed just with one inductor.
2) Input voltage 2.5 V - 5.5 V
3) Output current 1 A at 3.3 V
800 mA at 5.0 V
4) Incorporates soft-start function.
5) Incorporates timer latch system short protecting function.
6) High heat radiation surface mounted package VQFN020V4040
●Application
General portable equipment like portable audio or DSC/DVC
●Absolute Maximum Ratings
Parameter Symbol Ratings Unit
Maximum applied power voltage Vcc,PVCC 7.0 V
Maximum input current Iinmax 2.0 A
Maximum input voltage
Lx1 7.0 V
Lx2 7.0 V
Power dissipation Pd 700 mW
Operating temperature range Topr -25 to +85 ºC
Storage temperature range Tstg -55 to +150 ºC
Junction temperature Tjmax 150 ºC
*1 When installed on a 70.0 mm × 70.0 mm × 1.6 mm glass epoxy board. The rating is reduced by 5.6 mW/°C at Ta = 25°C or more.
●Operating Conditions (Ta = 25°C)
Parameter Symbol
Voltage range Unit
Power supply voltage Vcc 2.5 to 5.5 V
Output voltage OUT 2.8 to 5.2 V
No.09027ECT07
