Specification	BD9C301FJ-LBGH2

Current - Output	3 A
Frequency - Switching	500 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	8-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Supplier Device Package	8-SOP-J
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	18 V
Voltage - Input (Min) [Min]	4.5 V
Voltage - Output (Max) [Max]	12.6 V
Voltage - Output (Min/Fixed)	0.8 V

BD9C301FJ-LB(H2) Series

4.5V to 18V Input, 3.0A Integrated MOSFET 1ch Synchronous Buck DC/DC Converter

Part	Synchronous Rectifier	Supplier Device Package	Number of Outputs	Voltage - Input (Max) [Max]	Voltage - Input (Min) [Min]	Package / Case	Package / Case [y]	Package / Case [x]	Output Configuration	Frequency - Switching	Topology	Function	Current - Output	Voltage - Output (Min/Fixed)	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Output Type	Voltage - Output (Max) [Max]	Voltage - Input [Max]	Voltage - Input [Min]	Main Purpose	Regulator Topology	Voltage - Output	Outputs and Type	Outputs and Type	Supplied Contents	Utilized IC / Part	Board Type
Rohm Semiconductor BD9C301FJ-LBGH2		8-SOP-J	1	18 V	4.5 V	8-SOIC	3.9 mm	0.154 in	Positive	500 kHz	Buck	Step-Down	3 A	0.8 V	85 °C	-40 °C	Surface Mount	Adjustable	12.6 V
Rohm Semiconductor BD9C301FJ-EVK-001										500 kHz			3 A							18 V	4.72 V	DC/DC Step Down	Buck	3.3 V	Non-Isolated	1	Board(s)	BD9C301	Fully Populated

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 5.46
		10	$ 3.66
		25	$ 3.19
		100	$ 2.67
	Digi-Reel®	1	$ 5.46
		10	$ 3.66
		25	$ 3.19
		100	$ 2.67
	Tape & Reel (TR)	250	$ 2.41
		500	$ 2.26
		750	$ 2.18
		1250	$ 2.09
		1750	$ 2.04
		2500	$ 1.99
Newark	Each (Supplied on Cut Tape)	1	$ 5.53
		10	$ 3.62
		25	$ 3.12
		50	$ 3.10
		100	$ 3.07
		250	$ 2.27
		500	$ 2.01

Description

General part information

BD9C301FJ-LB(H2) Series

This is the product guarantees long time support in Industrial market. BD9C301FJ is a synchronous buck switching regulator with built-in low on-resistance power MOSFETs. With wide input voltage range, It is capable of providing current of up to 3 A. It is a current mode control DC/DC converter and features high-speed transient response. Phase compensation can also be set easily.

Documents

Technical documentation and resources

BD9C301FJ-LBGH2

Deep-Dive with AI

BD9C301FJ-LBGH2

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Technical Specifications

BD9C301FJ-LB(H2) Series

Pricing

Description

BD9C301FJ-LB(H2) Series

Documents

BD9C301FJ-LBGH2 Flammability

θ<sub>JA</sub> and Ψ<sub>JT</sub>

Suppression Method of Switching Noise Using Linear Regulator and Low Pass Filter

Judgment Criteria of Thermal Evaluation

Resistor Value Table to set Output Voltage of Buck Converter IC

Bootstrap Circuit in the Buck Converter

Considering Input Filter to Reduce Conducted Emissions by DCDC Converter

Precautions for PCB Layout Regarding Common Mode Filters

Considering Polarity of Power Inductor to Reduce Radiated Emission of DC-DC converter

Method for Determining Constants of Peripheral Parts of Buck DC/DC Converter

Evaluation Board User's Guide

SOP-J8 Package Information

Overview of ROHM's Simulation Models(for ICs and Discrete Semiconductors)

PCB Layout Techniques of Buck Converter

Design Guide and Example of Stencil for Exposed Pad

Snubber Circuit for Buck Converter IC

BD9C301FJ-LB(H2) Data Sheet

Factory Information

Cutting-Edge Web Simulation Tool "ROHM Solution Simulator" Capable of Complete Circuit Verification of Power Devices and Driver ICs

Types of Capacitors Used for Output Smoothing of Switching Regulators and their Precautions

PCB Layout Thermal Design Guide

Buck DC/DC Converter Recommended Inductor List

BD9C301FJ-LB(H2) Reference Circuits and Bomlist

Method for Calculating Junction Temperature from Transient Thermal Resistance Data

Measurement Method for Phase Margin with Frequency Response Analyzer (FRA)

Impedance Characteristics of Bypass Capacitor

Step-down DC-DC converter PCB layout EMC Design guide

Anti-Whisker formation

How to Use the Thermal Resistance and Thermal Characteristics Parameters

Considerations for Power Inductors Used for Buck Converters

Phase Compensation Design for Current Mode Buck Converter

Power Supply Sequence Circuit with General Purpose Power Supply IC

Solder Joint Rate and Thermal Resistance of Exposed Pad

Calculation of Power Loss (Synchronous)

Heat Dissipation Effect of Thermal Via in Exposed Pad Type Package

PCB Layout Essential Check sheet for Switching Regulator

PCB Layout for BD9C301FJ-LB(H2)

What Is Thermal Design

Three Steps for Successful Design of DC-DC Converters

Five Steps for Successful Thermal Design of IC

Two-Resistor Model for Thermal Simulation

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

Thermal Resistance

Industrial DC/DC Buck Converters BD9x Series

Efficiency of Buck Converter

Capacitor Calculation for Buck converter IC

Product Change Notice EN

Technical Data Sheet EN

BD9C301FJ-LB(H2) Series