BD9161FVM_12 Datasheet, PDF (1/19 Pages) Rohm – 2.5V to 4.5V, 0.6A 1ch Synchronous Buck Converter Integrated FET

Datasheet
2.5V to 4.5V, 0.6A 1ch
Synchronous Buck Converter Integrated FET
BD9161FVM
●General Description
ROHM’s high efficiency step-down switching regulator
BD9161FVM is a power supply designed to produce
1.2volts (low voltage) from 3.3volts power supply line.
Offers high efficiency with our original pulse skip
control technology and synchronous rectifier.
Employs a current mode control system to provide
faster transient response to sudden change
in load.
●Features
 Offers fast transient response with current mode
PWM control system.
 Offers highly efficiency for all load range with
synchronous rectifier (Nch/Pch FET)
 Incorporates 100% Duty function.
 Incorporates soft-start function.
 Incorporates thermal protection and ULVO
functions.
 Incorporates short-current protection circuit with
time delay function.
 Incorporates shutdown function Icc=0μA (Typ.)
●Key Specifications
 Input voltage range:
 Output voltage range:
 Output current:
 Switching frequency:
 Pch FET ON resistance:
 Nch FET ON resistance:
 Standby current:
 Operating temperature range:
2.5V to 4.5V
1.0V to 3.3V
0.6A(Max.)
1MHz(Typ.)
0.35Ω(Typ.)
0.37Ω(Typ.)
0μA (Typ.)
-25℃ to +85℃
●Package
MSOP8:
2.90 mm x 4.00 mm x 0.83 mm
●Applications
Power supply for HDD, DVD and for LSI of CPU, ASIC
●Typical Application Circuit
VCC
Cin
VOUT
RITH
CITH
VCC,PVCC
EN
SW
VOUT
ITH
GND,PGND
L
ESR
CO
VOUT
RO
Fig.1 Typical application circuit
○Product structure：Silicon monolithic integrated circuit
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© 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥14ï½¥001
○This product is not designed protection against radioactive rays.
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TSZ02201-0J3J0AJ00190-1-2
02.MAR.2012 Rev.001