Low drop adjustable positive voltage regulator - BA1117FP

The BA1117FP is a low drop voltage regulator able to provide up to 1 A of output current, available in adjustable versions (VREF=1.25V). The device is supplied in: TO252-3 and TO220-3. Surface mounted packages optimize the thermal characteristics while offering a relevant space saving advantage. High efficiency is assured by NPN pass transistor. Only a very common 22uF minimum capacitor is needed for stability. Chip trimming allows the regulator to reach a very tight reference voltage tolerance, within ±1% at 25?.

* This is a standard-grade product.
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Technical Documents

Application Note

BA1117 Series Application Information
 
The information in provides hints for IC mounting.
Connecting LDOs in Parallel
 
Provides some hints on how to connect LDOs in parallel.
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.
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.
BA1117 Series PCB Layout
 
The basic terminal configuration of a linear regulator IC consists of four parts: input, output, GND, and feedback…
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...
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.
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...
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.
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.
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.
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

Additional information Batch Download 

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 Contained Report
 
RoHS Comission Delegated Directive
 

Export Information

The Export Control Order
 
Export Administration Regulations(EAR)
 

Other

Factory Information