BD9123MUV_14 Datasheet, PDF (1/28 Pages) Rohm – Synchronous Buck Converter with Integrated FET

Datasheet
2.7V to 5.5V, 1.2A 1ch
Synchronous Buck Converter with
Integrated FET
BD9123MUV
General Description
BD9123MUV is ROHM’s high efficiency step-down
switching regulator designed to produce voltage as low
as 0.85V to 1.2V from a supply voltage of 5V/3.3V. It
offers high efficiency by using pulse skip control
technology and synchronous switches, and provides
fast transient response to sudden load changes by
implementing current mode control.
Features
■ Fast Transient Response with Current Mode PWM
Control System.
■ High Efficiency for All Load Range with
Synchronous Rectifier (Nch/Pch FET) and SLLM^TM
(Simple Light Load Mode)
■ Output Voltage Selector (3 bit)
■ PGOOD Function
■ Soft-Start Function
■ Thermal Shutdown and UVLO Functions.
■ Short-Circuit Protection Circuit with Time Delay
Function.
■ Shutdown Function
Applications
Power Supply for LSI including DSP, Microcomputer and
ASIC
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°C to +95°C
Package
W(Typ) x D(Typ) x H(Max)
VQFN016V3030
3.00mm x 3.00mm x 1.00mm
Typical Application Circuit
VIN
CIN
VOUT
VID<2:0>
RITH
CITH
EN
VOUT
VCC,PVCC
PGOOD
VID<2:0)
ITH
SW
GND,PGND
VCC
RPG
L
CO
VOUT
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
©2012 ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥14ï½¥001
○ This product has no designed protection against radioactive rays
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TSZ02201-0J3J0AJ00120-1-2
02.Oct.2014 Rev.002