Downloading...
 
product-image
 

2.7-5.5V 1.2A 1ch Buck converter - BD9123MUV

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 / 3.3 volts power supply line. The output voltage can be set with the built-in selector. 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.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Status
Package
Unit Quantity
Minimum Package Quantity
Packing Type
RoHS
BD9123MUV-E2 Active VQFN016V3030 3000 3000 Taping Yes
 
Specifications:
Grade Standard
ch 1
Integrated FET / Controller Integrated FET
Buck / Boost / Buck-Boost / Inverting Buck
Synchronous / Nonsynchronous Synchronous
Vin1(Min.)[V] 2.7
Vin1(Max.)[V] 5.5
Vout1(Min.)[V] 0.85
Vout1(Max.)[V] 1.2
Iout1(Max.)[A] 1.2
SW frequency(Max.)[MHz] 1.0
Light Load mode Yes
EN Yes
PGOOD No
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
Features:
  • ・Offers fast transient response with current mode PWM control system.
    ・Offers highly efficiency for all load range with synchronous rectifier (Pch / Nch FET) and SLLM™ (Simple Light Load Mode)
    ・Incorporates setup function of the output voltage (3bits)
    ・Incorporates PGOOD function.
    ・Incorporates soft-start function.
    ・Incorporates thermal protection ,ULVO function.
    ・Incorporates short-current protection circuit with time delay function.
    ・Incorporates shutdown function. Icc=0μA(Typ.)・High heat radiation small surface mount package : VQFN020V4040
 
 
Technical Data
Application Note

Capacitor Calculation for Buck converter IC

Application Note

Inductor Calculation for Buck converter IC

Application Note

Resistor Value Table to set Output Voltage of Buck Converter IC

Application Note

Thermal Resistance

Application Note

PCB Layout Techniques of Buck Converter

Application Note

The Important Points of Multi-layer Ceramic Capacitor Used in Buck Converter circuit

Application Note

Calculation of Power Loss (Synchronous)

Application Note

Considerations for Power Inductors Used for Buck Converters

Application Note

Snubber Circuit for Buck Converter IC

Application Note

Efficiency of Buck Converter

Application Note

Buck DC/DC Converter Recommended Inductor List