BD9151MUV Datasheet, PDF (1/17 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 Regulator Series
Output 1.5A or Less High Efficiency
Step-down Switching Regulator
with Built-in Power MOSFET
BD9151MUV
No.09027EAT11
●Description
ROHM’s high efficiency dual step-down switching regulator BD9151MUV is a power supply designed to produce a low
voltage including 1.8 volts or 1.2 volts from 2.8 volts to 5.0 volts power supply line. Reset circuits of input power supply
voltage and external Pch MOSFET gate controller are incorporated. 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 (Pch/Nch FET) and SLLM^TM (Simple Light Load Mode)
3) Incorporates soft-start function.
4) Incorporates Thermal / ULVO protection functions.
5) Incorporates thermal protection and short-current protection circuit with timer latch function. .
6) Incorporates shutdown function Icc=0µA(Typ.)
7) Incorporates reset function
8) Incorporates Pch MOSFET gate controller
9) Employs small surface mount package : VQFN020V4040
●Applications
Power supply for LSI including DSP, Micro computer and ASIC
●Absolute maximum ratings (Ta=25℃)
Parameter
Vcc Voltage
Symbol
Limit
Unit
AVCC
-0.3～+7^*1
V
PVcc
-0.3～+7^*1
V
EN Voltage
VEN
-0.3～+7
V
SW Voltage
Power Dissipation
VSW1
-0.3～+7
V
VSW2
-0.3～+7
V
Pd1
0.34^*2
W
Pd2
0.70^*3
W
Pd3
2.21^*4
W
Pd4
3.56^*5
W
Operating Temperature Range
Topr
-40～+85
℃
Storage Temperature Range
Tstg
-55～+150
℃
Maximum Junction Temperature
Tjmax
+150
℃
*1 Pd, ASO and Tj=150℃ 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, occupied area by copper foil : 10.29mm² , 2-3 layers 5505 mm²
*5 4-layer. mounted on a 74.2mm×74.2mm×1.6mm glass-epoxy board, occupied area by copper foil : 5505mm², in each layers
●Operating conditions (Ta=-40～+85℃)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Vcc Voltage
AVCC、PVCC
2.8
3.3
5.5
V
EN Voltage
SW Average Output Current
VEN
ISW1
ISW2
0
-
5.5
V
-
-
0.4^*6
A
-
-
0.8^*6
A
*6 Pd and ASO should not be exceeded.
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2009.08 - Rev.A