BD9P205EFV-C (新產品)
Nano Pulse Control™, 3.5V~40V輸入, 2A 可變電壓輸出, 車電一次側DC/DC轉換器

BD9P系列是兼顧高速回應和高效率的42V耐壓車電一次側DC/DC轉換器IC。其特點是透過Nano Pulse Control™實現的穩定且較大的降壓比、透過擴頻功能實現的低EMI(低雜訊)、在電池剛啟動時也能穩定供電的高速回應性能,有助於降低系統功耗和降低BOM成本。
包括ADAS的感測器、相機、雷達,以及車電資訊娛樂、儀錶板、 BCM(車身控制模組)在內,適用於汽車中要求小型化、高效率化、高可靠性的應用。

Product Detail

料號 | BD9P205EFV-CE2
狀態 | 推薦品
封裝 | HTSSOP-B20
單位數量 | 2500
最小包裝數量 | 2500
包裝形式 | Taping
RoHS | Yes


類別 : FS supportive
A product that has been developed for automotive use and is capable of supporting safety analysis with regard to the functional safety.




Common Standard

AEC-Q100 (Automotive Grade)



Integrated FET / Controller

Integrated FET



Synchronous / Nonsynchronous












SW frequency(Max.)[MHz]


Light Load mode






Operating Temperature (Min.)[°C]


Operating Temperature (Max.)[°C]



  • Nano Pulse Control™
  • AEC-Q100 Qualified (Grade 1)
  • Minimum ON Pulse 50 ns (Max)
  • Synchronous Buck DC/DC Converter Integrating POWER MOSFETs
  • Soft Start Function
  • Current Mode Control
  • Reset Function
  • Quiescent Current 10 µA (Typ) with 12 V Input to 5.0 V Output
  • Light Load Mode (LLM)
  • Forced Pulse Wide Modulation (PWM) Mode
  • Phase Compensation Included
  • Selectable Spread Spectrum Switching
  • External Synchronization Function
  • Selectable Over Current Protection (OCP)
  • Input Under Voltage Lockout (UVLO) Protection
  • Thermal Shut Down (TSD) Protection
  • Output Over Voltage Protection


    • Evaluation Board
    • BD9P2x5EFV-TSB-001
    • This Evaluation Board was developed for ROHM’s single 2.2MHz buck DC/DC converter BD9P2x5EFV-C. BD9P2x5EFV-C Series are current mode synchronous buck DC/DC converter integrating POWER MOSFETs. The BD9P2x5EFV-C series accepts a power supply input range of 3.5V to 40V and generates a maximum output current of 2A.

  • User's Guide Purchase Inquiry
    • Reference Design
    • REFRPT001-EVK-001
    • The REFRPT001-EVK-001 is a board included in power tree solution reference design named as REFRPT001 developed for infotainment devices such as vehicle clusters and center information displays, as well as for ADAS ECUs. The power system that can support functional safety is integrated on a single board, realizing an optimal configuration as a power tree.

  • User's Guide Detail

Design Resources



White Paper

  • Cutting-Edge Web Simulation Tool “ROHM Solution Simulator” Capable of Complete Circuit Verification of Power Devices and Driver ICs
  • For Automotive ADAS/Infotainment application, CISPR25 Class5 compliant 8 rails power tree Reference Design with power rail monitoring for supporting functional safety

User's Guide

  • User's Guide for REFRPT001-EVK-001
  • Evaluation Board User's Guide for BD9P2x5EFV-C series

Reference Design

  • Application Note for REFRPT001-EVK-001
  • REFRPT001-EVK-001 EMC Test Report

Technical Articles

Schematic Design & Verification

  • Calculation of Power Dissipation in Switching Circuit
  • Considering Input Filter to Reduce Conducted Emissions by DCDC Converter
  • Considering Polarity of Power Inductor to Reduce Radiated Emission of DC-DC converter
  • Method for Monitoring Switching Waveform
  • PCB Layout Techniques of Buck Converter
  • Phase Compensation Design for Current Mode Buck Converter
  • Bootstrap Circuit in the Buck Converter
  • Method for Determining Constants of
  • Power Supply Sequence Circuit with General Purpose Power Supply IC
  • Suppression Method of Switching Noise Using Linear Regulator and Low Pass Filter
  • Measurement Method for Phase Margin with Frequency Response Analyzer (FRA)
  • Usage of SPICE Macromodel for DC/DC
  • Snubber Circuit for Buck Converter IC
  • Efficiency of Buck Converter
  • Calculation of Power Loss (Synchronous)
  • Inductor Calculation for Buck converter IC
  • Considerations for Power Inductors Used for Buck Converters
  • Capacitor Calculation for Buck converter IC
  • The Important Points of Multi-layer Ceramic Capacitor Used in Buck Converter circuit
  • Resistor Value Table to set Output Voltage of Buck Converter IC
  • Importance of Probe Calibration When Measuring Power: Deskew
  • Impedance Characteristics of Bypass Capacitor

Thermal Design

  • Method for Calculating Junction Temperature from Transient Thermal Resistance Data
  • Notes for Temperature Measurement Using Thermocouples
  • Two-Resistor Model for Thermal Simulation
  • Notes for Temperature Measurement Using Forward Voltage of PN Junction
  • Thermal Resistance
  • Precautions When Measuring the Rear of the Package with a Thermocouple


Simulations (Login Required)

「ROHM Solution Simulator」是一款能在ROHM官網上運行的電子電路模擬工具。從零件選擇和元件單體驗證等研發初期階段到系統級的驗證階段,各項模擬工作都可以在Web上執行。ROHM提供的SiC元件等功率元件產品、驅動IC和電源IC等IC產品,都可以在接近實際環境的解決方案電路中輕易地進行驗證,大幅縮短研發週期。
  • REFRPT001 / Load Response for 3.3V Power Tree Sub-circuit
  • BD9P205EFV-C / Frequency Response
  • BD9P205EFV-C / Load Response
  • BD9P205EFV-C / Line Response
  • Simulation Guide for REFRPT001 for 3.3V power tree sub-circuit / Load Response (ROHM Solution Simulator)
  • Simulation Guide for BD9P205EFV-C / Frequency Response (ROHM Solution Simulator)
  • Simulation Guide for BD9P205EFV-C / Line Response (ROHM Solution Simulator)
  • Simulation Guide for BD9P205EFV-C / Load Response (ROHM Solution Simulator)

Calculation Tools

  • Calculation-sheet for the circuit theoretical formula - BD9Pxx5EFV/MUF-C


  • BD9P2x5EFV-C Series Two-Resistor Thermal Model Report
  • BD9P205EFV-C SPICE Model


  • BD9P205EFV-C Footprint / Symbol
  • HTSSOP-B20 Footprint / Symbol
  • HTSSOP-B20 3D STEP Data

Packaging & Quality

Manufacturing Data

  • Factory Information