Exploring LD1117S33TR PMIC Features and Datasheet Information

In the world of voltage regulation, the LD1117S33TR stands out as a reliable, low-dropout voltage regulator known for its adaptability and stability across various applications. Available in both adjustable and fixed configurations, it offers robust voltage management, maintaining a steady output even under fluctuating input conditions. With integrated thermal and short-circuit protections, the LD1117S33TR proves requisite in sensitive electronic environments, such as computer systems and communication devices. This article digs into its basic features, practical applications, and technical strengths, showcasing why you favor its straightforward yet effective design for creating compact, reliable power solutions.

Catalog

Overview of the LD1117S33TR

The LD1117S33TR excels as a voltage regulator, offering up to 800 mA with an adjustable reference voltage beginning at 1.25 V. Its ease of integration into existing systems, thanks to pin-to-pin compatibility with standard industry modules, makes this device appealing for diverse applications.

The adjustable version of the LD1117S33TR provides noteworthy enhancements, such as lowering dropout voltage. This trait fosters efficient energy usage, ensuring systems remain stable amidst fluctuating input conditions. The enhanced voltage tolerance contributes to reliability, valued greatly in scenarios requiring a steady power supply. In practical application, the LD1117S33TR demonstrates versatility across numerous circuits. It garners appreciation for simplifying integration, thus reducing redesign costs and expediting development timelines.

Pin Layout Details

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

LD1117S33TR CAD Representation

Symbol

Footprint

3D Model

Alternatives

• LM1117MPX-3.3/NOPB

• LT1117IST-3.3#TR

• LD1117S30C

• LM1117MPX-2.5

LD1117S33TR Applications

• Basic Configuration: To utilize a fixed voltage regulator version, you must connect the power source to the Vin pin and draw a stabilized output from the Vout pin, keeping the Adj/Ground pin grounded. Introducing a capacitor at the output can significantly reduce noise interference, which is principally beneficial in sensitive applications, ensuring clarity where noise might cause issues.

• Adjustable Output Configuration: For scenarios requiring adjustable output, connecting two resistors, R1 and R2, enables voltage tuning per the desired specification. Augmenting ripple rejection by adding a capacitor, CAdj, can enhance stability. You can often find that tweaking these components boosts performance, especially in dynamic environments demanding flexibility.

• Noise Management: Implementing additional capacitors at both the input and output offers effective noise filtration. This technique preserves signal integrity, an aspect active in precision electronics. Insights from field testing and iterative design improvements often guide optimal capacitor selection and placement, reflecting the depth of practical expertise.

Block Diagram

Application Circuit Design

Circuit Configuration for 1.2 V Output

Crafting Circuits for Different Fixed Outputs

Dimensions

Technical Specifications

Type	Parameter
Lifecycle Status	ACTIVE (Last Updated: 7 months ago)
Factory Lead Time	8 Weeks
Contact Plating	Tin
Mount	Surface Mount
Mounting Type	Surface Mount
Package / Case	TO-261-4, TO-261AA
Number of Pins	3
Weight	4.535924g
Operating Temperature	0°C ~ 125°C
Packaging	Tape & Reel (TR)
JESD-609 Code	e3
Part Status	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Number of Terminations	4
Termination	SMD/SMT
ECCN Code	EAR99
Packing Method	TR, 7 INCH
Max Power Dissipation	12W
Terminal Position	DUAL
Terminal Form	GULL WING
Number of Functions	1
Base Part Number	LD1117
Pin Count	4
JESD-30 Code	R-PDSO-G4
Number of Outputs	1
Output Voltage	3.3V
Output Type	Fixed
Max Output Current	1.3A
Voltage	3.3V
Max Supply Voltage	15V
Min Supply Voltage	4.75V
Output Configuration	Positive
Power Dissipation	12W
Quiescent Current	10mA
Accuracy	1%
Max Output Voltage	3.3V
Output Voltage 1	3.3V
Number of Regulators	1
Min Input Voltage	4.75V
Protection Features	Over Current, Over Temperature
Voltage Dropout (Max)	1.2V @ 800mA
PSRR	75dB (120Hz)
Dropout Voltage	1.1V
Nominal Input Voltage	3.3V
Dropout Voltage1-Nom	1.1V
Min Output Voltage	3.3V
Nominal Output Voltage	3.3V
Input Bias Current	5mA
Output Voltage Accuracy	1%
Height	1.8mm
Length	6.5mm
Width	3.5mm
REACH SVHC	No SVHC
Radiation Hardening	No
RoHS Status	ROHS3 Compliant
Lead Free	Lead Free

Comparable Parts

Part Number

Manufacturer

Package / Case

Number of Pins

Number of Outputs

Max Output Current

Min Input Voltage

Nominal Input Voltage

Min Output Voltage

Nominal Output Voltage

Output Voltage

Max Output Voltage

Accuracy

View Compare

LD1117S33TR

STMicroelectronics

TO-261-4, TO-261AA

3

1

1.3 A

4.75 V

3.3 V

3.3 V

3.3 V

3.3 V

3.3 V

1%

LD1117S33TR VS NCP1117ST33T3G

NCP1117ST33T3G

ON Semiconductor

TO-261-4, TO-261AA

3

1

1.3 A

3.6 V

2.5 V

2.5 V

2.5 V

2.5 V

2.5 V

1%

LD1117S33TR VS NCP1117ST33T3G

LD1117STR

STMicroelectronics

TO-261-4, TO-261AA

4

1

1:00 AM

3.5 V

-

3.3 V

3.3 V

3.3 V

3.3 V

1%

LD1117S33TR VS LD1117STR

LD1117S50CTR

STMicroelectronics

TO-261-4, TO-261AA

3

1

1.3 A

2.35 V

-

1.25 V

-

15 V

15 V

1%

LD1117S33TR VS LD1117S50CTR

LD1117S25TR

STMicroelectronics

TO-261-4, TO-261AA

3

1

1.3 A

6.5 V

-

5 V

-

5 V

5 V

1%

LD1117S33TR VS LD1117S25TR

Datasheet PDF

LD1117S33TR Datasheets:

LD1117xx.pdf

NCP1117ST33T3G Datasheets:

Cylindrical Battery Holders.pdf

NCP,NCV1117.pdf

LD1117STR Datasheets:

LD1117xx.pdf

LD1117S50CTR Datasheets:

LD1117xx.pdf

LD1117S25TR Datasheets:

LD1117xx.pdf

Frequently Asked Questions [FAQ]

1. What is LD1117S33TR?

The LD1117S33TR is a versatile low-dropout voltage regulator that can handle up to 800 mA of output current. Available in fixed and adjustable voltage versions, it offers multiple standard output voltages. Its widespread use is a testament to its efficiency and the flexible role it plays in delivering stable power supplies, especially in power-sensitive environments. The regulator showcases adaptability, meeting various technological requirements. In applications, you can find that the LD1117S33TR excels in heat-sensitive scenarios, helping extend device life and efficiency.

2. What is voltage dropout?

Voltage dropout is the smallest voltage difference needed between the input and output to ensure the regulator maintains the correct output voltage regulation. This measure reflects a regulator's efficiency, mostly when the input voltage nears the output voltage. A lower dropout voltage implies greater efficiency, which has remarkable implications for devices relying on limited power sources like batteries. In practice, reducing the dropout voltage can greatly enhance the longevity and performance of portable electronics by minimizing unnecessary power dissipation.