AMS1117 3.3V SMD Voltage Regulator IC SOT-223 Price in Bangladesh

The AMS 1117 3.3V SMD Voltage Regulator IC is a fixed-output linear voltage regulator designed to provide a regulated 3.3V DC output from a higher DC input voltage. It is widely used in electronic circuits where a stable 3.3V supply is required for microcontrollers, sensors, communication modules, memory devices, and other low-voltage electronics.

The AMS 1117 family is available in several fixed-voltage versions, and the AMS 1117-3.3 version provides a nominal 3.3V output. Its compact SOT-223 surface-mount package makes it suitable for PCB designs where space efficiency is important.

This regulator is commonly found in Arduino-compatible electronics, ESP32-related circuits, embedded systems, communication modules, development boards, and custom electronic devices.

As a linear regulator, the AMS 1117 is simple to integrate and does not require an inductor like a switching regulator. However, the voltage difference between the input and output is dissipated as heat, so thermal considerations are important when operating at higher current or with a larger input-output voltage difference.

What is AMS1117?

AMS 1117 is a family of low-dropout linear voltage regulators designed to provide regulated output voltage for electronic circuits. Fixed-output versions are available in different voltage ratings, including 1.2V, 1.5V, 1.8V, 2.5V, 2.85V, 3.3V, and 5V, depending on the manufacturer and device version.

The AMS 1117-3.3 provides a fixed nominal output of 3.3V. The device is commonly used when a simple regulated supply is required for digital electronics and embedded circuits.

Key Features

Fixed 3.3V Output

The AMS 1117-3.3 is designed to provide a nominal regulated output voltage of 3.3V, making it suitable for many modern low-voltage electronic circuits.

Low-Dropout Operation

As an LDO-type linear regulator, the AMS 1117 can maintain regulation with an input voltage that is relatively close to the output voltage compared with conventional linear regulator designs.

SOT-223 Package

The SOT-223 surface-mount package provides a compact footprint while also offering a metal tab that can assist with heat dissipation when properly connected to an appropriate PCB copper area.

High Current Capability

The device family is commonly specified for output currents up to approximately 800mA, although the usable current depends strongly on input voltage, thermal conditions, PCB design, and the particular manufacturer’s datasheet.

Simple Circuit Design

The AMS 1117 requires relatively few external components, making it convenient for straightforward power-regulation applications.

Technical Specifications

• Product Type: Linear voltage regulator IC
• Part Number: AMS1117-3.3
• Output Voltage: 3.3V nominal
• Output Type: Fixed
• Regulator: Low-dropout linear regulator
• Package: SOT-223
• Mounting: Surface Mount Device (SMD)
• Typical Maximum Output Current: Up to approximately 800mA
• Input Voltage: Must remain within the particular manufacturer’s specified operating range
• Reference Voltage: Approximately 1.25V for the adjustable AMS 1117 architecture
• Thermal Protection: Available on many AMS 1117 implementations
• Short-Circuit Protection: Available on many AMS 1117 implementations
• Application: 3.3V regulated power supply
• Package Type: SOT-223-3 / manufacturer-specific equivalent

Important: AMS 1117 is manufactured by multiple semiconductor suppliers, and exact electrical specifications, dropout voltage, thermal limits, pin configuration, and maximum input voltage can vary by manufacturer. Check the datasheet of the supplied IC when designing a production circuit.

Working Principle

The AMS 1117-3.3 operates as a linear voltage regulator. A higher DC voltage is applied to its input, and the regulator controls the output to maintain a nominal 3.3V level within its operating conditions.

Unlike a switching regulator, the AMS 1117 does not convert the excess voltage into useful output power. Instead, the voltage difference between input and output is primarily dissipated as heat.

For example, if a circuit receives a voltage substantially higher than 3.3V, the regulator reduces it to approximately 3.3V for the load. As the input voltage or load current increases, the amount of heat generated by the regulator can also increase.

For this reason, PCB copper area and thermal management are important when using the AMS 1117 at relatively high currents.

Applications

The AMS1117 3.3V regulator can be used in:

• Arduino-compatible projects
• ESP32 power circuits
• Microcontroller power supplies
• Sensor modules
• Embedded systems
• IoT devices
• Communication circuits
• 3.3V digital logic circuits
• Memory and peripheral power supplies
• Raspberry Pi accessory circuits
• Custom PCB designs
• Battery-powered electronics
• Development boards
• Low-voltage electronic equipment

Advantages

• Fixed 3.3V regulated output
• Compact SOT-223 package
• Simple implementation
• Low component count
• Suitable for many embedded applications
• Widely available and commonly used
• Surface-mount construction
• Useful for converting a suitable higher DC voltage to 3.3V

Limitations

Because the AMS1117 is a linear regulator, it is generally less power-efficient than a suitable switching regulator when the input voltage is substantially higher than 3.3V.

For example, the power dissipated by the regulator increases with both the voltage difference between input and output and the load current. Excessive dissipation can cause the regulator to become hot and enter thermal protection.

The regulator also requires sufficient input-to-output voltage headroom to maintain regulation. It should therefore not be treated as an ideal 3.3V converter across all input voltages.

Installation / Usage Tips

Check the exact datasheet and pin configuration of the AMS1117-3.3 version being used before PCB assembly, as manufacturer-specific variants can differ.

Use suitable input and output capacitors as recommended by the IC manufacturer. These capacitors help maintain regulator stability and improve transient response.

Provide adequate PCB copper around the regulator’s thermal area when higher current is required. Avoid operating the IC beyond its thermal and electrical ratings.

When converting a large input voltage down to 3.3V, consider the heat generated by the regulator. For applications requiring substantial current or significant voltage reduction, a suitable switching regulator may provide better efficiency.

Always ensure that the regulated 3.3V output is compatible with the connected circuit.

Why Choose AMS1117 3.3V SMD Voltage Regulator IC?

The AMS1117-3.3 is a practical choice when a simple, compact, fixed 3.3V linear regulator is needed on a PCB. Its SOT-223 package provides a useful balance between compact board layout and thermal handling.

For students, electronics hobbyists, PCB designers, and embedded-system developers, it can be useful for creating regulated 3.3V supply sections for microcontrollers, sensors, and digital electronics.

Why Buy from ElectroXBD?

ElectroXBD is a trusted electronics components supplier in Bangladesh, offering voltage regulators, Arduino boards, sensors, modules, robotics parts, batteries, tools, and other electronic components.

Our shop is located at:

H#1/1, Opposite of RH Chhatrabash, Vodra-Talaimari Road, Rajshahi

Whether you are repairing an electronic circuit, designing a custom PCB, developing an Arduino or ESP32 project, or working on an academic electronics project, ElectroXBD provides practical components for a wide range of applications.

ElectroXBD – Trusted Source for Reliable Electronic Parts

Frequently Asked Questions (FAQ)

What is AMS1117 3.3V used for?

The AMS1117-3.3 is used to regulate a suitable higher DC input voltage down to a stable nominal 3.3V output for electronic circuits.

Is AMS1117 a linear regulator?

Yes. The AMS1117 is a low-dropout linear voltage regulator family. It regulates voltage by dissipating excess voltage as heat rather than using high-frequency switching.

What is the output voltage of AMS1117-3.3?

The fixed-output AMS1117-3.3 version provides a nominal 3.3V output within its specified operating conditions.

What package does AMS1117-3.3 use?

The AMS1117-3.3 is commonly supplied in a SOT-223 surface-mount package.

Can AMS1117-3.3 be used with ESP32 projects?

Yes. A regulated 3.3V supply can be used for suitable ESP32-related circuits, provided the regulator can supply the required current and the complete circuit meets the ESP32 board or module’s power requirements.

How much current can AMS1117 provide?

Many AMS1117 datasheets specify up to approximately 800mA, but the practical current depends on thermal conditions, input voltage, PCB heat dissipation, and the exact manufacturer/version.

Does AMS1117 get hot?

It can. Since it is a linear regulator, the difference between input and output voltage is dissipated as heat. Higher input voltage and higher load current can therefore produce more heat.

Where can I buy AMS1117 3.3V in Bangladesh?

You can buy the AMS1117 3.3V SMD Voltage Regulator IC SOT-223 from ElectroXBD, a trusted electronics components supplier in Bangladesh.

Common Questions:

Q: What is the price of AMS1117 3.3V SMD Voltage Regulator IC SOT-223 in Bangladesh?

A: The latest price of AMS1117 3.3V SMD Voltage Regulator IC SOT-223 in Bangladesh is 20 BDT.

Q: Where to buy AMS1117 3.3V SMD Voltage Regulator IC SOT-223 in Bangladesh?

A: You can buy the AMS1117 3.3V SMD Voltage Regulator IC SOT-223 at the best price from ElectroXBD in Bangladesh.