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Ovaga Certification

Brands: STMicroelectronics, Inc

Mfr.Part #: LD1117S25CTR

Datasheet: LD1117S25CTR Datasheet (PDF)

Package/Case: SOT223

Product Type: Power Management ICs

RoHS Status:

Stock Condition: 2461 pcs, New Original

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LD1117S25CTR General Description

The LD1117 is a low drop voltage regulator able to provide up to 800 mA of output current, available even in adjustable version (VREF= 1.25 V). Concerning fixed versions, are offered the following output voltages: 1.2 V, 1.8 V, 2.5 V, 2.85 V, 3.3 V and 5.0 V. The device is supplied in: SOT-223, DPAK, SO-8 and TO-220. The SOT-223 and DPAK surface mount packages optimize the thermal characteristics even offering a relevant space saving effect. High efficiency is assured by NPN pass transistor. In fact in this case, unlike than PNP one, the quiescent current flows mostly into the load. Only a very common 10 μF minimum capacitor is needed for stability. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 1 % at 25 °C. The adjustable LD1117 is pin to pin compatible with the other standard. Adjustable voltage regulators maintaining the better performances in terms of drop and tolerance.



  • Low dropout voltage (1 V typ.)
  • 2.85 V device performances are suitable for SCSI-2 active termination
  • Output current up to 800 mA
  • Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V, 3.3 V, 5.0 V
  • Adjustable version availability (VREF= 1.25 V)
  • Internal current and thermal limit
  • Available in ± 1 % (at 25 °C) and 2 % in full temperature range
  • Supply voltage rejection: 75 dB (typ.)


Parameter Value Parameter Value
feature-type LDO feature-packaging Tape and Reel
feature-maximum-power-dissipation-mw 12000 feature-rad-hard
feature-pin-count 4 feature-supplier-package SOT-223
feature-standard-package-name SOT feature-cecc-qualified No
feature-esd-protection Unknown feature-escc-qualified
feature-military No feature-aec-qualified No
feature-aec-qualified-number feature-eccn-code EAR99


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2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


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All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

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  • ESD

Datasheet PDF

Preliminary Specification LD1117S25CTR PDF Download

Key points

  • The LD1117S25CTR is a voltage regulator chip that provides a stable output voltage of 2.5 volts. It is commonly used in electronic devices to regulate and control the voltage supplied to various components, ensuring they operate within their specified voltage range. The LD1117S25CTR is a reliable and efficient solution for applications requiring a fixed voltage source.
  • Equivalent

    Some equivalent products to the LD1117S25CTR chip include the LM1117, LP2985, and MCP1702 chips. These are all low-dropout linear voltage regulators that have similar specifications and can be used as alternatives to the LD1117S25CTR chip.
  • Features

    LD1117S25CTR is a low dropout voltage regulator. It has an output voltage of 2.5V, a dropout voltage of 1.2V, and a maximum output current of 800mA. It features thermal shutdown and current limit protection, making it suitable for various applications that require a regulated voltage supply.
  • Pinout

    The LD1117S25CTR is a low-dropout linear voltage regulator with a pin count of 3. It provides a regulated output voltage of 2.5V with a maximum current of 800mA. The three pins are: IN for input voltage, GND for ground, and OUT for regulated output voltage.
  • Manufacturer

    STMicroelectronics is the manufacturer of the LD1117S25CTR. It is a global semiconductor company that designs, develops, manufactures, and markets a wide range of products including integrated circuits, microcontrollers, sensors, power management devices, and more.
  • Application Field

    The LD1117S25CTR is a voltage regulator designed to provide a fixed 2.5V output voltage. It is commonly used in applications such as power supplies, battery chargers, and embedded systems that require a stable and regulated voltage source.
  • Package

    The LD1117S25CTR chip comes in a surface-mount SOT-223 package. The form factor of the chip is very compact, measuring approximately 12.2 mm x 6.7 mm x 2.3 mm (L x W x H).

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