Skip to the content
PCBKitNew board
LD1117DT33 on a board, in 3D

LD1117DT33

STMicroelectronics

0℃~+125℃@(Tj) 1 1.2V@(800mA) 100uVrms 15V 3.3V 5mA 75dB@(120Hz) 800mA Fixed Over Current Protection、Over Temperature Protection Positive TO-252-2 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHS

Extended
DatasheetJLCPCBLCSCst/LD1117DT33
Category
Linear Voltage Regulators (LDO)
Package
TO-252-2
Pins
3

Overview

The LD1117DT33 is a linear Voltage Regulator made by STMicroelectronics in a TO-252-2 package with 3 pins. 0℃~+125℃@(Tj) 1 1.2V@(800mA) 100uVrms 15V 3.3V 5mA 75dB@(120Hz) 800mA Fixed Over Current Protection、Over Temperature Protection Positive TO-252-2 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHS.

PCBKit's library has its KiCad symbol (Regulators:REG3 1GND-2IN-3OUT, from CERN's library) and its footprint (Package_TO_SOT_SMD:TO-252-2, from KiCad's library), ready for a KiCad board. 21,397 are in stock at JLCPCB (part C132629). 4 open-source boards in 4 repositories on GitHub use it.

Symbol

GNDIN2GND1OUT3
Regulators:REG3 1GND-2IN-3OUTFrom CERN's library

Footprint

123
Package_TO_SOT_SMD:TO-252-2From KiCad's library

From the datasheet

10
Supply, least
4.75 V · Vin, min for specified output voltage, IO = 0 to 800 mA · p. 12
Supply, most
15 V · Vin, recommended operating, IO = 100 mA, max · p. 12
Supply, absolute maximum
15 V · VIN, absolute maximum · p. 7
Junction, hottest
125 °C · standard version, operating junction temperature, max · p. 7
Takes working
5 mA · quiescent current, Vin ≤ 15 V, typical · p. 12
Gives
800 mA · rated output current, max · p. 1
Output
3.3 V · fixed output, Vin = 5.3 V, IO = 10 mA, TJ = 25 °C, typical · p. 12
Dropout
1.1 V · IO = 800 mA, typical · p. 12
Junction to case (DPAK)
8 K/W · junction-case · p. 7
Junction to air (DPAK)
100 K/W · junction-ambient · p. 7

Parameters

20
Current - Supply
5mA
Dropout Voltage
1.2V@(800mA)
Features
Over Current Protection
Junction Temperature(Max)
125℃
Noise
100uVrms
Number of Outputs
1
Operating Temperature
0℃~+125℃@(Tj)
Output Configuration
Positive
Output Current
800mA
Output Polarity
Positive
Output Type
Fixed
Output Voltage
3.3V
Power Supply Rejection Ratio (PRSS)
75dB@(120Hz)
Power Supply Rejection Ratio (PSRR)
75dB@(120Hz)
Thermal Resistance(Junction to Ambient)
100℃/W
Thermal Resistance(Junction to Case)
8℃/W
Voltage - Supply
4.75V~15V
Voltage - Supply(Absolute Max)
15V
Voltage Dropout
1.1V
standby current
5mA

Order codes

1

Pinout

3
The pins of the LD1117DT33
PinNameType
1GNDPower in
2INInput
3OUTPower in

Open-source boards using it

All 4
  • 2 layers65 × 100 mmJBclone soldering station, the printed circuit board in 3D

    JBclone soldering station

    Minu-IU3IRR/JBclone-soldering-station

    Multi channel DIY soldering station with JBC tip support

    55 parts13
  • 6 layers100.3 × 68.6 mmMYRIAD RD 5.1.2.unrouted, the printed circuit board in 3D

    MYRIAD RD 5.1.2.unrouted

    aspdac-submission-pcb-layout/PCB-Layout-Framework

    This repository has been prepared from the original. Some care has been taken to remove the names of the authors.

    984 parts7BSD-3-Clause
  • 2 layers70 × 38 mmEsp8266-probe, the printed circuit board in 3D

    Esp8266-probe

    mgottschlag/esp8266-probe

    JTAG probe using the ESP8266

    63 parts
  • 2 layers64.8 × 25.4 mmFpv board, the printed circuit board in 3D

    Fpv board

    zaerik/RAPTOR

    RAPTOR Advanced Platform for TeleOperated Reconnaissance

    14 partsMIT

Show this part on your page

A live frame, for any web page
<iframe src="https://pcbkit.io/embed/parts/st/LD1117DT33" title="LD1117DT33 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>
A picture
<img src="https://pcbkit.io/embed/parts/st/LD1117DT33.jpg" alt="LD1117DT33" width="1200" height="900">
A picture that opens the part, for a README
[![LD1117DT33](https://pcbkit.io/embed/parts/st/LD1117DT33.jpg?size=s)](https://pcbkit.io/parts/st/LD1117DT33)

Questions

Is there a KiCad symbol and footprint for the LD1117DT33?

Yes. The symbol is Regulators:REG3 1GND-2IN-3OUT and the footprint Package_TO_SOT_SMD:TO-252-2, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the LD1117DT33?

TO-252-2, with 3 pins. Its footprint is drawn on this page.

Where is the LD1117DT33 datasheet?

STMicroelectronics publishes it: the Datasheet link on this page opens it.

Where can I order the LD1117DT33?

JLCPCB lists it as part C132629, with 21,397 in stock; the sellers' links on this page open their listings.

What can replace the LD1117DT33?

Parts like it in the library: the LM3940IT-3.3 by Texas Instruments, the AMS1117-3.3 by HGC, the TJ1117GS-3.3 by HTC Korea TAEJIN Tech and the IL1117C-3.3ET by IKSEMICON. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the LD1117DT33?

4 boards in 4 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8