BD9123MUV_12 Datasheet, PDF (1/22 Pages) Rohm – 2.7V to 5.5V, 1.2A 1ch Synchronous Buck Converter integrated FET

Datasheet
2.7V to 5.5V, 1.2A 1ch
Synchronous Buck Converter integrated FET
BD9123MUV
●General Description
ROHM’s high efficiency step-down switching
regulator BD9123MUV is a power supply designed to
produce a low voltage including 0.85 to 1.2 volts
from 5.5/3.3 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
(Simple Light Load Mode)
■ Incorporates output voltage inside control
function.(3 bit)
■ Incorporates PGOOD 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:
2.7V to 5.5V
0.85V to 1.2V
1.2A (Max.)
1MHz(Typ.)
0.35Ω(Typ.)
0.25Ω(Typ.)
0μA (Typ.)
-40℃ to +95℃
●Package
VQFN016V3030:
3.00mm x 3.00mm x 1.00mm
●Applications
Power supply for LSI including DSP, Micro computer
and ASIC
●Typical Application Circuit
VCC
Cin
VOUT
VID<2:0>
RITH
CITH
EN
VOUT
VCC,PVCC
PGOOD
VID<2:0)
ITH
SW
GND,PGND
VCC
RPG
L
ESR
CO
VOUT
RO
Fig.1 Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays.
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TSZ02201-0J3J0AJ00120-1-2
02.MAR.2012 Rev.001