BD9123MUV_11 Datasheet, PDF (1/18 Pages) Rohm – Output 1.5A or Less High-efficiency Step-down Switching Regulator with Built-in Power MOSFET

Single-chip Type with Built-in FET Switching Regulators
Output 1.5A or Less
High-efficiency Step-down Switching Regulator
with Built-in Power MOSFET
BD9123MUV
No.11027EAT38
●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
1) Offers fast transient response with current mode PWM control system.
2) Offers highly efficiency for all load range with synchronous rectifier (Nch/Pch FET)
and SLLM (Simple Light Load Mode)
3) Incorporates output voltage inside control function.(3 bit)
4) Incorporates PGOOD function.
5) Incorporates soft-start function.
6) Incorporates thermal protection and ULVO functions.
7) Incorporates short-current protection circuit with time delay function.
8) Incorporates shutdown function Icc=0µA(Typ.)
9) Employs small surface mount package: VQFN016V3030
●Applications
Power supply for LSI including DSP, Micro computer and ASIC
●Absolute maximum ratings (Ta=25℃)
Parameter
Symbol
Ratings
Unit
VCC Voltage
PVCC Voltage
Vcc
PVcc
-0.3～+7 *¹
V
-0.3～+7 *¹
V
EN,SW,ITH Voltage
EN, SW, ITH
-0.3～+7
V
Logic input voltage
Power Dissipation 1
Power Dissipation 2
Power Dissipation 3
Power Dissipation 4
VID<2:0>
-0.3～+7
V
Pd1
0.27 *²
W
Pd2
0.62 *³
W
Pd3
1.77 *⁴
W
Pd4
2.66 *⁵
W
Operating temperature range
Topr
-40～+95
℃
Storage temperature range
Tstg
-55～+150
℃
Maximum junction temperature
Tj
+150
℃
*1 Pd should not be exceeded.
*2 IC only
*3 1-layer. mounted on a 74.2mm×74.2mm×1.6mm glass-epoxy board, occupied area by copper foil : 10.29mm²
*4 4-layer. mounted on a 74.2mm×74.2mm×1.6mm glass-epoxy board, 1^st and 4^th copper foil area : 10.29mm² , 2^nd and 3^rd copper foil area : 5505mm²
*5 4-layer. mounted on a 74.2mm×74.2mm×1.6mm glass-epoxy board, occupied area by copper foil : 5505mm², in each layers
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/17
2011.01 - Rev.A