BD3507HFV - 技術資料

超低飽和穩壓器BD3507HFV非常適合作爲晶片組用的電源。輸出電容器能夠使用陶瓷電容器,因此有助於IC和裝置的小型/薄型化。雖然為小型的但由於採用了附有散熱片的功率封裝,因此能夠作爲最大電流550mA的穩壓器使用。採用Nch MOSFET可以構成RON=300mΩ(TYP)的超低飽和電源,所以雖然是線性型電源卻能構成高效率的系統。輸出電壓可透過VREF端子設定,可以與其他電源同步。另外,還可以作爲低電壓電源線(1.2~2.5V)的高壓側開關(high side switch)(RON=300mΩ/Io=550mA)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。

Application Note

Basics of Linear Regulators
 
A linear regulator, also referred to as a "three-terminal regulator" or "dropper," is a power supply long known to many designers owning to its simple circuitry and ease of use...
Linear Regulator Specifications
 
Very important information such as maximum ratings, operating conditions and characteristic graphs are described in the table.
Reverse Voltage Protection
 
A linear regulator integrated circuit (IC) is a DC-to-DC buck converter system that reduces a DC supply from higher voltage level to a lower voltage level...
Power Source ON/OFF Characteristics for Linear Regulator
 
When a linear regulator IC is turned ON, the electric charge is stored in the output capacitor and the output voltage increases up to the specified value.
Thermal Calculation for Linear Regulator
 
This application note explains how to estimate the junction temperature of the IC chip, and provides calculation examples for the ROHM’s standard circuit boards.
Simple Test Method for Estimating the Stability of Linear Regulators
 
Low drop-out (LDO) regulators developed back in the age when large-capacitance multi-layer ceramic capacitors (hereinafter, MLCCs) were uncommon cause a phase delay, leading to oscillation when connected to a low-ESR capacitor like an MLCC...
Connecting LDOs in Parallel
 
Provides some hints on how to connect LDOs in parallel.
Problem Situations: Power Supply Does Not Start
 
Although linear regulators can be used to easily configure power supplies, the linear regulators may cause startup problems depending on the type of loads. This application note introduces cases where the power supplies do not start correctly in the linear regulators.
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.
Table of resistance for output voltage setting on linear regulator Ics
 
This application notes provide tables for each series so that it is easy to set the resistance value for the output voltage setting from various internal reference voltages VREF.
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.
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 LDO)
 
This application note explains how to install SPICE macromodels and how the circuit symbols are configured.
BAxxCC0 Series Circuit Using a Ceramic Output Capacitor
 
This application note proposes a circuit using an output ceramic capacitor that allows a stable phase compensation.
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.
Impedance Characteristics of Bypass Capacitor
 
This application note focuses on the impedance characteristics of capacitors, and explains cautions for selecting bypass capacitors.
Part Explanation
 
For ICs