BD9122GUL-E2 Datasheet, PDF (1/19 Pages) Rohm – 2.5V to 5.5V, 0.3A 1ch Synchronous Buck Converter integrated FET

Datasheet
2.5V to 5.5V, 0.3A 1ch
Synchronous Buck Converter integrated FET
BD9122GUL
●General Description
ROHM’s high efficiency step-down switching regulator
(BD9122GUL) is a power supply designed to produce
a low voltage including 1 volts from 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^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:
 Output voltage range:
 Output current:
 Switching frequency:
 Pch FET ON resistance:
 Nch FET ON resistance:
 Standby current:
 Operating temperature range:
2.5V to 5.5V
1.0V to 2.0V
0.3A (Max.)
1MHz(Typ.)
0.3Ω(Typ.)
0.2Ω(Typ.)
0μA (Typ.)
-25℃ to +85℃
●Package
VCSP50L2:
2.50mm x 1.10mm x 0.55mm
●Applications
Power supply for LSI including DSP, Micro computer
and ASIC
●Typical Application Circuit
VCC
Cin
VOUT
RITH
CITH
EN
VCC,PVCC
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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© ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥14ï½¥001
○This product is not designed protection against radioactive rays.
TSZ02201-0J3J0AJ00110-1-2
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02.MAR.2012 Rev.001