PMIC - Voltage Regulators - Linear SOT-223 1A
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Oct 26, 2021
Jim Curme
How to use AMS1117
PMIC - Voltage Regulators - Linear SOT-223 1A
AMS1117-3.3V, 1A, SOT-223 Voltage Regulator IC is a series of low dropout three-terminal regulators with a dropout of 3.3V at 1A load current. This article mainly covers the datasheet, power, pinout, specifications, and other details about the 3.3V AMS1117 3.3v regulator. Furthermore, there is a huge in stock. Welcome your RFQ!
AMS1117
AMS1117 Pinout
| Pin Number | Pin Name | Description |
| 1 | Adjust/Ground | This pin adjusts the output voltage, if it is a fixed voltage regulator it acts as ground |
| 2 | Output Voltage (Vout) | The regulated output voltage set by the adjusted pin can be obtained from this pin |
| 3 | Input Voltage (Vin) | The input voltage which has to be regulated is given to this pin |
The AMS1117 is a popular 3-pin voltage regulator with an SMD package that comes in a variety of variants to meet both fixed and variable voltage requirements. The IC has a maximum current of 1A and a range of output voltages of 1.5V to 5V. When operating at maximum current, it also boasts a low drop-off voltage of 1.3V.
AMS1117 Symbol
AMS1117 Footprint
AMS1117 3D Model
Advanced Monolithic Systems AMS1117 technical specifications, attributes, parameters and parts with similar specifications to Advanced Monolithic Systems AMS1117.
| Product Attribute | Attribute Value | |
|---|---|---|
| Package / Case | SOT-223 | |
| Operating Temperature | 0℃~125℃ TJ | |
| Packaging | Tape & Reel (TR) | |
| Current - Supply (Max) | 120μA | |
| Voltage - Input (Max) | 15V |
| Product Attribute | Attribute Value | |
|---|---|---|
| Output Type | Adjustable | |
| Output Configuration | positive | |
| Voltage Dropout (Max) | 1.3V @ 800mA | |
| Output Current-Max | 800mA | |
| Number of Output Channels | 1Output Channel |
| Product Attribute | Attribute Value | |
|---|---|---|
| Ripple Rejection (PSRR) | 75dB(120Hz) | |
| Voltage - Output (adj) | 1.25V~11.75V | |
| RoHS Status | RoHS Compliant |
Three Terminal Adjustable or Fixed Voltages* 1.5V, 1.8V, 2.5V, 2.85V, 3.3V and 5.0V
Output Current of 1A
Operates Down to 1V Dropout
Line Regulation: 0.2% Max
Load Regulation: 0.4% Max.
SOT-223, TO-252, and SO-8 packages are available
LM1117, LM317, LM7805, NTE9060
High-Efficiency Linear Regulators
Used for Positive voltage regulations
5V to 3.3V Linear Regulator
Variable power supply
Current limiting circuits
Reverse polarity circuits
Commonly used in Desktop PC, DVD and other consumer products
Used in motor control circuits
The AMS1117 is a voltage regulator with a linear output. Since it is accessible as a DCY Package, it is noted for its tiny form factor (SMD Component). The LM1117 comes in a variety of packages and output voltages. All of the ICs, however, are rated for a maximum current of 1A. The table below will assist you in selecting the correct part number for your IC.
The IC is well-known for being used to regulate 5V and 3.3V in Arduino boards. So, if you're seeking a voltage regulator for SMD components, this IC might be the one for you.
The AMS1117 is relatively simple to operate. If the voltage regulator is a fixed voltage regulator, simply supply power to the IC through the VIN pin, and the regulated output can be found on the Vout pin. In this situation, the Adj/Ground pin is only used as a ground pin and is grounded. A capacitor can also be added to the output side of the circuit to filter out noise. Below is a circuit diagram for a variable output regulator.
AMS1117 Circuit
To determine the output voltage of an adjustable type voltage regulator, two external resistors are required. The output voltage of the regulator is determined by the resistors R1 and R2. A reference circuit schematic with adjustable voltage is presented below. The CAdj capacitor is an optional component that can be used to increase ripple rejection. The input and output noise is filtered by the other two capacitors.
AMS1117 Circuit
Below are the formulas for calculating the output voltage of the AMS1117 regulator. R1 and R2 should be set to the output voltage required for your project. It's important to remember that R1 should be smaller than 1k. If you wish to change the voltage in real-time, use a variable resistor at R2.
VOUT = VREF (1 + R2/R1) + IADJR2
The AMS1117, which can be used as a fixed voltage or variable voltage regulator, is frequently used in battery charging circuits and can also be programmed to give negative voltage if necessary. More application circuits for this IC can be found in the datasheet at the bottom of this page.
AMS1117 Dimensions
Advanced Monolithic Systems (AMS) has grown rapidly as a manufacturer of high-quality products and reliable services. Based on their goal of "complete customer satisfaction", they aspire to build a solid relationship with their customers. AMS is dedicated to providing innovative and cost-effective products and reliable services to meet the highest expectation of customers. After their dedication to success and quality, AMS will win a high reputation.
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