BD33IA5WEFJ_技术资料

BDxxIA5WEFJ系列是可提供0.5A输出电流的LDO稳压器。输出精度为±1%。有可使用外接电阻在0.8V~4.5V范围内任意设置输出电压的可变型以及1.0V/1.2V/1.5V/1.8V/2.5V/3.0V/3.3V固定输出型两种。封装组件采用散热性优良的HTSOP-J8。可用于数字家电等广泛用途。本机型内置用于防止因输出短路等发生IC破坏的过电流保护电路、关断时使电路电流为0µA的ON/OFF开关、以及防止因过负荷状态等使IC发生热破坏的温度保护电路。另外,采用了陶瓷电容器,有助于整机的小型化和长寿化。

* 本产品是标准级的产品。本产品不建议使用于车载设备。

Application Note

BDxxIA5 Series Dropout Voltage
 
This application note provides design values of the “Dropout voltage” that are necessary for designing circuits. From the operating temperature and output current of the target specification, check the maximum value of the input/output voltage difference and use it as the circuit design value.
BDxxIA5 Series Application Information
 
The information in provides hints for IC mounting.
BDxxGC0, BDxxGA5, BDxxGA3, BDxxHC5, BDxxHC0,BDxxHA5, BDxxHA3, BDxxIC0, BDxxIA5 Series PCB Layout
 
The basic terminal configuration of a linear regulator IC consists of four parts: input, output, GND, and feedback…
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.
Two-Resistor Model for Thermal Simulation - Power Management
 
This application note explains the two-resistor model, which is the simplest model among thermal models used in thermal simulations. The thermal simulations mentioned three-dimensional model thermal conduction and thermal fluid analysis tools.
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.
Part Explanation
 
For ICs