Zenode.ai Logo
Beta
Product thumbnail image
Integrated Circuits (ICs)

BD9G401EFJ-E2

Active
Rohm Semiconductor

1CH BUCK CONVERTER INTEGRATED FET

Deep-Dive with AI

Search across all available documentation for this part.

Product thumbnail image
Integrated Circuits (ICs)

BD9G401EFJ-E2

Active
Rohm Semiconductor

1CH BUCK CONVERTER INTEGRATED FET

Technical Specifications

Parameters and characteristics for this part

SpecificationBD9G401EFJ-E2
Current - Output3.5 A
Frequency - Switching300 kHz
FunctionStep-Down
Mounting TypeSurface Mount
Number of Outputs1
Operating Temperature [Max]105 ░C
Operating Temperature [Min]-40 C
Output ConfigurationPositive
Output TypeAdjustable
Package / CaseExposed Pad, 8-SOIC
Package / Case [x]0.154 in
Package / Case [y]3.9 mm
Supplier Device Package8-HTSOP-JES
Synchronous RectifierFalse
TopologyBuck
Voltage - Input (Max) [Max]42 V
Voltage - Input (Min) [Min]4.5 V
Voltage - Output (Max) [Max]42 V
Voltage - Output (Min/Fixed)0.8 V

Pricing

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

DistributorPackageQuantity$
DigikeyN/A 2297$ 1.50

Description

General part information

BD9G401EFJ Series

BD9G401EFJ is buck converters with built-in high side MOSFET. It has an input voltage range of 4.5V to 42V. Current mode architecture provides fast transient response and a simple phase compensation setup. The IC is mainly used as a secondary side power supply: for example, a step-down output of 3.3V/5V can be produced from voltage power supply such as 12V or 24V. In addition, it has a synchronization function with an external CLK that provides noise management.

Documents

Technical documentation and resources

Inductor Calculation for Buck converter IC

Schematic Design & Verification

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

Schematic Design & Verification

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

Schematic Design & Verification

Two-Resistor Model for Thermal Simulation

Thermal Design

Power Supply Sequence Circuit with General Purpose Power Supply IC

Schematic Design & Verification

Diode Selection Method for Asynchronous Converter

Schematic Design & Verification

Precautions for PCB Layout Regarding Common Mode Filters

Technical Article

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

Schematic Design & Verification

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

White Paper

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

Technical Article

Considering Input Filter to Reduce Conducted Emissions by DCDC Converter

Schematic Design & Verification

HTSOP-J8ES Package Information

Package Information

What Is Thermal Design

Thermal Design

θ<sub>JA</sub> and Ψ<sub>JT</sub>

Thermal Design

Resistor Value Table to set Output Voltage of Buck Converter IC

Schematic Design & Verification

How to Use the Two-Resistor Model

Thermal Design

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

Schematic Design & Verification

Calculation of Power Dissipation in Switching Circuit

Schematic Design & Verification

How to Use the Thermal Resistance and Thermal Characteristics Parameters

Thermal Design

Three Steps for Successful Design of DC-DC Converters

White Paper

PCB Layout Thermal Design Guide

Thermal Design

Design Guide and Example of Stencil for Exposed Pad

Thermal Design

Efficiency of Buck Converter

Schematic Design & Verification

Judgment Criteria of Thermal Evaluation

Thermal Design

Phase Compensation Design for Current Mode Buck Converter

Schematic Design & Verification

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

Schematic Design & Verification

BD9G401EFJ Data Sheet

Data Sheet

PCB Layout Techniques of Buck Converter

Schematic Design & Verification

Basics of Thermal Resistance and Heat Dissipation

Thermal Design

Calculation of Power Loss (Synchronous)

Schematic Design & Verification

PCB Layout Essential Check sheet for Switching Regulator

Schematic Design & Verification

Factory Information

Manufacturing Data

Snubber Circuit for Buck Converter IC

Schematic Design & Verification

Thermal Resistance

Thermal Design

Impedance Characteristics of Bypass Capacitor

Schematic Design & Verification

Heat Dissipation Effect of Thermal Via in Exposed Pad Type Package

Thermal Design

θ<sub>JC</sub> and Ψ<sub>JT</sub>

Thermal Design

Five Steps for Successful Thermal Design of IC

White Paper

Solder Joint Rate and Thermal Resistance of Exposed Pad

Thermal Design

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

Schematic Design & Verification

Considerations for Power Inductors Used for Buck Converters

Schematic Design & Verification

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

Schematic Design & Verification

Method for Calculating Junction Temperature from Transient Thermal Resistance Data

Thermal Design

Capacitor Calculation for Buck converter IC

Schematic Design & Verification

Precautions When Measuring the Rear of the Package with a Thermocouple

Thermal Design