on November 5th 99

LD1117 Voltage Regulator: Pinout, Alternatives, and Specifications

LD1117, celebrated for its efficiency as a positive voltage regulator, shines in electronic applications for its low voltage drop performance. This articles explores the intricate operational mechanisms and diverse applications of LD1117 in electronic circuits. Grasping its function can greatly enhance the pursuits of individuals focused on designing and refining electronic devices, providing illuminating perspectives on attaining consistent power efficiency and stability. The exploration of LD1117's capabilities allows for a deeper appreciation of how it contributes to the success of electronic solutions.

Catalog

Overview of the LD1117

The LD1117 distinguishes itself with precise voltage regulation, achieving a maximum dropout of just 1V. Its capacity to deliver up to 800 mA of current is attractive for a variety of demanding applications, including energizing microcontrollers and operating small motors. These characteristics promote confidence in contexts that require consistent voltage output, showcasing its versatility in electronic circuit design. The device meets a wide range of voltage requirements with fixed outputs spanning from 1.2V to 5.0V. Moreover, an adjustable version provides a reference voltage of 1.25V, offering the creative latitude to customize voltage output for specific needs. This adjustability plays a role in projects that require different voltage levels to suit diverse components or experimental settings.

With a variety of packaging options, SOT-223, DPAK, SO-8, and TO-220, the LD1117 presents with choices that align with spatial and thermal demands of their work. This packaging variety aids in seamless integration into numerous PCB designs, supporting both compact form factors and efficient heat dissipation. Many value these elements for their role in extending the life of electronic components and securing stable performance even under fluctuating environmental conditions. Managing heat dissipation effectively by choosing the right packaging option is a great consideration. For example, using the correct heat sink or spreader can greatly reduce the likelihood of thermal-related issues. Diving into the intricacies of load and line regulation when working with LD1117 unveils optimization possibilities that enhance power management efficiency.

The LD1117 emerges as a functional and dependable component for voltage regulation needs. Its expansive output range, current handling capability, and variety of package options render it an approachable choice. By embracing its adaptable nature and gaining insight into its operational characteristics, you can capitalize on its advantages to boost the performance and dependability of their electronic ventures.

LD1117 Pin Configuration

Pin Number	Pin Name	Description
1	Ground	Ground Pin – connected to the ground of the system.
2	Vout	Regulated Output Voltage
3	Vin	Input Voltage that is to be regulated

LD1117 Symbol, Footprint, and CAD Model

Features of the LD1117

Versatile Output Parameters

The LD1117 regulator stands out for providing an output current reaching up to 800 mA. Its adaptability is portrayed through several fixed voltage configurations and adjustable voltage settings, which cater to diverse needs. This adaptability finds its place effectively in consumer electronics, where precise voltage levels closely influence device performance, echoing desires for precision and satisfaction.

Internal Safeguard Features

An aspect of the LD1117 is its internal mechanisms that shield against current overload and thermal stress. Such protections bolster device reliability, proving especially valuable in erratic environments prone to voltage shifts. Others often rely on these safeguards, attributing the enduring stability of their projects to these thoughtfully engineered features, paralleling a sense of security in human endeavors.

Supply Voltage Noise Mitigation

An important facet of the regulator is its capacity to maintain up to 75 dB of supply voltage rejection, underscoring its effectiveness in curbing power supply noise. This trait proves advantageous in sensitive applications where maintaining signal integrity is important. With application and occasional field adjustments, many often realize that these noise-minimizing properties enhance overall system functionality, mirroring the quest for clarity and coherence.

Functional Diagram of LD1117

Applications of the LD1117

Prolonged Battery Efficiency

The LD1117 has a special place in advancing battery efficiency. Its talent lies in maintaining a constant output voltage even when battery power wavers. In devices like portable electronics, it extends battery life and delivers steady performance. Emphasizing energy efficiency, today's devices are often engineered with meticulous care, balancing load needs and using the LD1117 to precisely manage power flow while curbing energy waste.

Versatile Power Supply Adaptation

When it comes to variable power supplies, the LD1117's true strength is its adaptability to diverse voltage demands. This versatility is appreciated in circuit designs catering to multiple operational conditions. Many craft configurations where the LD1117 fine-tunes the output to meet specific voltage requirements of circuit segments. This doesn't just enhance performance but also acts as a safeguard against potential over-voltage hazards, showcasing prudent risk approaches in electronic design.

Safeguards in Current Regulation

The LD1117's role in current limiting circuits stands out for controlling excessive current that could compromise components. In crafting such circuits, many trust the regulator to ensure both safety and longevity of electronic systems. By imposing calculated limits, the LD1117 acts as a protective barrier against short circuits and overloads in sensitive electronics where reliability holds importance.

Seamless Integration in Consumer Electronics and PCs

In PCs and consumer electronics, the LD1117 helps achieve effective power distribution and voltage control, ensuring consistent device performance under shifting loads. Its compactness and reliability warrant its popularity. With increasing demand for devices that are both power-efficient and responsive, integrating the LD1117 can enhance system performance.

Reliable Automotive Solutions

In automotive scenarios like motor controllers, the LD1117's resilience in tough conditions is well-regarded. The automotive domain consistently employs regulators such as the LD1117 to ensure steady power delivery for vehicle safety and performance. Withstanding high temperatures and vibrations, it meets the industry's rigorous durability standards. Insights from automotive engineering propose that using the LD1117 enriches the reliability of powertrain systems, pushing forward innovations in both electric and hybrid vehicle technologies.

Circuit Designs for LD1117 Applications

Integrating LD1117 in Circuits

Establishing proper fixed voltage regulation requires accurate connections between the input, output, and ground pins. Achieving consistent voltage outputs is need for electronic projects that are sensitive to variations, such as those involving low-noise amplifiers or microcontrollers. Ensuring a clean ground path contributes to the circuitry's stability and reliability.

When non-standard voltages are required, resistors R1 and R2 can be utilized for precise voltage adjustments, offering adaptability during prototyping or testing. The key to success lies in selecting resistor values that not only meet the specific voltage needs but also optimize component function and thermal balance, ensuring prolonged device functionality. Using capacitors can greatly improve ripple rejection, leading to smoother voltage delivery for precise applications. This practice, often verified in lab environments, aids in stabilizing transient responses and minimizing noise. Others highlight that choosing capacitors with low Equivalent Series Resistance (ESR) enhances overall performance by reducing fluctuations and increasing the circuit's robustness. When applying the LD1117, it is need to consider these strategies for achieving specific electrical outputs while factoring in real-world demands for reliability and adaptability. Analyzing different approaches underscores their role in a wide range of electronic circuit designs, enhancing the device's applicability to various engineering challenges.

LD1117 Technical Specifications

Technical characteristics, specifications, and attributes of the STMicroelectronics LD1117, as well as parts comparable to the LD1117STR.

Type	Parameter
Lifecycle Status	ACTIVE (Last Updated: 7 months ago)
Contact Plating	Tin
Mounting Type	Surface Mount
Number of Pins	3
Operating Temperature	0°C~125°C
JESD-609 Code	e3
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Termination	SMD/SMT
Packing Method	TR, 7 INCH
Terminal Position	DUAL
Number of Functions	1
Pin Count	3
Factory Lead Time	8 Weeks
Mount	Surface Mount
Package / Case	TO-261-4, TO-261AA
Weight	4.535924g
Packaging	Tape & Reel (TR)
Part Status	Active
Number of Terminations	4
ECCN Code	EAR99
Max Power Dissipation	12W
Terminal Form	GULL WING
Base Part Number	LD1117
JESD-30 Code	R-PDSO-G4
Number of Outputs	1
Output Type	Adjustable
Max Supply Voltage	15V
Power Dissipation	12W
Accuracy	1%
Number of Regulators	1
Protection Features	Over Current, Over Temperature
PSRR	75dB (120Hz)
Dropout Voltage	1.1V
Min Output Voltage	1.25V
Output Voltage Accuracy	1%
Height	1.8mm
Width	3.5mm
Radiation Hardening	No
Lead Free	Lead Free
Output Voltage	15V
Max Output Current	1.3A
Output Configuration	Positive
Quiescent Current	10mA
Max Output Voltage	15V
Min Input Voltage	2.35V
Voltage Dropout (Max)	1.2V @ 800mA
Reference Voltage	1.262V
Dropout Voltage1-Nom	1.1V
Input Bias Current	5mA
Load Regulation-Max(%)	0.40%
Length	6.5mm
REACH SVHC	No SVHC
RoHS Status	ROHS3 Compliant

Alternatives of the LD1117

Part Number	Manufacturer	Package / Case	Number of Pins	Number of Outputs	Max Output Current	Min Input Voltage	Min Output Voltage	Output Voltage	Max Output Voltage	Accuracy
LD1117STR	STMicroelectronics	TO-261-4, TO-261AA	3	1	1.3 A	2.35 V	1.25 V	15 V	15 V	1%
TLV1117LV33DCYR	Texas Instruments	TO-261-4, TO-261AA	4	1	1.2 A	2.75 V	1.25 V	15 V	-	2%
TLV1117LV28DCYR	Texas Instruments	TO-261-4, TO-261AA	4	1	1:00 AM	2 V	1.5 V	1.5 V	1.5 V	2%
LD1117ASTR	STMicroelectronics	TO-261-4, TO-261AA	4	1	1:00 AM	2 V	2.8 V	2.8 V	2.8 V	2%
TLV1117LV15DCYR	Texas Instruments	TO-261-4, TO-261AA	4	1	1:00 AM	2 V	3.3 V	3.3 V	3.3 V	2%

Packaging of LD1117

LD1117 Manufacturer Information

STMicroelectronics stands as a trailblazer in the realm of semiconductor innovation, channeling years of profound expertise in system-on-chip (SoC) solutions into the LD1117. This commitment to cutting-edge technology not only enriches the LD1117’s capabilities but aligns seamlessly with a vast array of applications. Such dedication, fueled by rigorous research and strategic alliances, has fortified its position as a stalwart in the industry. STMicroelectronics epitomizes this blend by devising solutions like the LD1117 that echo a pledge to sustainability and groundbreaking innovation. The strategic anticipation in addressing forthcoming challenges while upholding high performance establishes an industry benchmark for excellence. The LD1117 from STMicroelectronics exemplifies the company's unwavering pursuit of groundbreaking semiconductor solutions that pair innovative technology with practical application. Its evolution, supported by comprehensive research and industry partnerships, represents an outstanding model of innovation many aspire to emulate. As the semiconductor terrain progresses, STMicroelectronics' technology advancement strategy will continue to be influential in molding the future of integrated circuit design.

Datasheet PDF

LD1117STR Datasheets:

LD1117xx.pdf

TLV1117LV33DCYR Datasheets:

Copper Wire Base Metal 07/Oct/2014.pdf

TLV1117LVxx Datasheet.pdf

TLV1117LVYYY 25/Apr/2018.pdf

TLV1117LV28DCYR Datasheets:

Cylindrical Battery Holders.pdf

TLV1117LVxx Datasheet.pdf

LD1117ASTR Datasheets:

LD1117Axx.pdf

TLV1117LV15DCYR Datasheets:

Cylindrical Battery Holders.pdf

TLV1117LVxx Datasheet.pdf

TLV1117LVYYY 25/Apr/2018.pdf