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2.7V to 5.5V Input, 3A Integrated MOSFET Single Synchronous Buck DC/DC Converter - BD9B331GWZ

ROHM's high efficiency switching regulator, BD9B331GWZ, is a step-down converter designed to produce a low voltage output of 0.6V to 3.3V from a 2.7V to 5.5V power supply line. It offers high efficiency in all load ranges by automatic PFM/PWM adjustment. It employs an On time 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
BD9B331GWZ-E2 Active UCSP30L1 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] 0.6
Vout1(Max.)[V] 4.4
Iout1(Max.)[A] 3.0
SW frequency(Max.)[MHz] 1.3
Light Load mode Yes
EN Yes
PGOOD Yes
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
Features:
    • Fast transient response with On time control system.
    • High efficiency for all load range with synchronous rectifier (Nch/Nch FET) and adaptive PFM/PWM system.
    • Adjustable Soft-start function.
    • Thermal and UVLO protection.
    • Short-circuit current protection with pulse count
    • Shutdown function.
 
 
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