4.5-28V 4A 1ch Synchronous Buck converter with Built-in Linear Regulator - BD95514MUV

BD95514MUV為實現大電流(最大4A)從寬輸入電壓範圍(4.5~28V)到低輸出電壓(0.7V~5.0V)的切換式穩壓器。內建有N-MOSFET切換電晶體,可達到省空間的高效率同步整流切換式穩壓器。透過採用ROHM獨創的H3Reg™控制模式,能夠實現業界最快的過渡響應特性。另外,爲了改善輕負載時的效率採用SLLM™(Simple Light Load Mode),對於寬範圍負載均可實現高效率。具有緩起動功能、頻率可變功能、附計時器閂鎖的輸出短路保護電路功能、輸出電壓保護功能、REF同步功能,最適合於PC用的切換式電源使用。

* 本產品是標準級的產品。本產品不建議使用的車載設備。

技術資料

Application Note

Method for Determining Constants of
 
This application note explains the procedures for determining the constants of peripheral parts of a buck DC/DC converter.
Power Supply Sequence Circuit with General Purpose Power Supply IC
 
This application note proposes a circuit that accomplishes the power supply sequence without using any dedicated power supply sequence IC, by using general purpose power supply ICs.
Phase Compensation Design for Current Mode Buck Converter
 
This application note explains the method used by ROHM for designing the phase compensation for current mode buck converters.
Bootstrap Circuit in the Buck Converter
 
This application note explains the step-up circuit using a bootstrap capacitor. In buck converters, this circuit is used when the highside switch is the N-ch MOSFET.
Suppression Method of Switching Noise Using Linear Regulator and Low Pass Filter
 
This application note describes the method and result of the ripple and switching noise suppression using a linear regulator and a low pass filter.
PCB Layout Techniques of Buck Converter
 
Major problems that arise from in appropriate layout may cause increase in noise superposed by output and switching signal, the deterioration of regulator, and also lack of stability...
Measurement Method for Phase Margin with Frequency Response Analyzer (FRA)
 
This application note introduces a method for easily measuring the phase margin with a Frequency Response Analyzer (FRA) made by NF Corporation.
Usage of SPICE Macromodel for DC/DC
 
This application note explains how to install SPICE macromodels and how the circuit symbols are configured.
Snubber Circuit for Buck Converter IC
 
In buck converter ICs, many high-frequency noises are generated at switch nodes. A snubber circuit provides one way of eliminating such harmonic noise. This application note explains how to set up the RC snubber circuits.
Efficiency of Buck Converter
 
This application note explains power loss factors and methods for calculating them. It also explains how the relative importance of power loss factors depends on the specifications of the switching power source.
Calculation of Power Loss (Synchronous)
 
This application note describes how to obtain the power loss required to calculate the temperature of a semiconductor device. Temperature control is important to ensuring product reliability.
Thermal Resistance
 
The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.
Inductor Calculation for Buck converter IC
 
This application note covers the steps required in choosing the inductor and to calculate the value used in buck regulator IC circuits.
Considerations for Power Inductors Used for Buck Converters
 
This application note explains the features and things to consider when shopping for power inductors.
Capacitor Calculation for Buck converter IC
 
This application note explains the calculation of external capacitor value for buck converter IC circuit.
The Important Points of Multi-layer Ceramic Capacitor Used in Buck Converter circuit
 
Using unmatched MLCC may not obtain required target characteristics for power supply circuit and may cause abnormal operation. This application note explains the important points while using MLCC.
Resistor Value Table to set Output Voltage of Buck Converter IC
 
This Application Note offers reference table to easily set resistor values for output voltage with various internal reference voltages VREF.
Part Explanation
 
For ICs

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Package Information

Package Information
 
Package Structure, Packing Specification, Footprint dimensions, Marking Specification, Storage conditions, Soldering conditions
Anti-Whisker formation
 

Environmental Data

UL94 Flame Classifications of Mold Compound
 
Compliance with the ELV directive
 
REACH SVHC Non-use Declaration
 
RoHS Comission Delegated Directive
 

Export Information

The Export Control Order
 
Export Administration Regulations(EAR)
 

Other

Factory Information