BD9102FVM_12 Datasheet, PDF (1/29 Pages) Rohm – 4.0V(or 4.5V) to 5.5V, 0.8A 1ch Synchronous Buck Converter Integrated FET

4.0V(or 4.5V) to 5.5V, 0.8A 1ch
Synchronous Buck Converter Integrated FET
BD9102FVM BD9104FVM BD9106FVM
●General Description
ROHM’s high efficiency step-down switching
regulator (BD9102FVM, BD9104FVM, BD9106FVM)
is a power supply designed to produce a low voltage
including 1.24 volts from 5 volts 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)
and SLLM^TM (Simple Light Load Mode)
 Incorporates soft-start function.
 Incorporates thermal protection and ULVO
functions.
 Incorporates short-current protection circuit with
time delay function.
 Incorporates shutdown function
●Key Specifications
 Input voltage range
BD9102FVM , BD9106FVM: 4.0V to 5.5V
BD9104FVM
4.5V to 5.5V
 Output voltage range
BD9102FVM:
1.24V ± 2%
BD9104FVM:
3.30V ± 2%
BD9106FVM:
1.20V to 2.50V
 Output current:
0.8A(Max.)
 Switching frequency:
1.0MHz(Typ.)
 Pch FET ON resistance:
350mΩ(Typ.)
 Nch FET ON resistance:
250mΩ(Typ.)
 Standby current:
0μA(Max.)
 Operating temperature range:
-25℃ to +85℃
●Package
MSOP8:
2.90 mm x 4.00 mm x 0.83 mm
●Applications
Power supply for HDD, power supply for portable
electronic devices like PDA, and power supply for LSI
including CPU and ASIC
●Typical Application Circuit
Cin
L
VCC
VCC,PVCC
EN
SW
VOUT
VOUT
VOUT
ESR
RO
ITH
GND,PGND
CO
RITH
CITH
Fig.1 Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
©2011 ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥14ï½¥001
○This product is not designed protection against radioactive rays.
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TSZ02201-0J3J0AJ00080-1-2
02.MAR.2012 Rev.001