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| Categories | Integrated Circuit Components | 
|---|---|
| Brand Name: | STMicroelectronics | 
| Model Number: | LD1117S33CTR | 
| Certification: | CE, GCF, ROHS | 
| Place of Origin: | China | 
| MOQ: | 1 | 
| Price: | Negotiable | 
| Payment Terms: | T/T, Western Union, | 
| Supply Ability: | 1000pcs per month | 
| Delivery Time: | 3-5 working days after received the payment | 
| Packaging Details: | Packed in original tray firstly ,then carton, at last Bubble bag for outer packing | 
| Function: | Step-Up, Step-Down | 
| Output Configuration: | Positive or Negative | 
| Topology: | Buck, Boost | 
| Output Type: | Adjustable | 
| Number of Outputs: | 1 | 
| Company Info. | 
| TOP Electronic Industry Co., Ltd. | 
| Verified Supplier | 
| View Contact Details | 
| Product List | 
LD1117S33CTR 3.3V LDO Voltage Regulator with 1A Output Low Dropout Voltage High Accuracy Over-Current & Thermal Protection Stable with Ceramic Capacitors SOT-223 Package
Features
• Low dropout voltage (1 V typ.)
• Output current up to 800 mA SO-8
• 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.)
Applications
1. Consumer Electronics
Smart Home Devices: Such as Wi-Fi smart plugs, sensors, remotes, etc., used to power the main MCU and sensor modules.
Portable Devices: Such as MP3 players, digital photo frames, handheld fans, etc., for voltage conversion and regulation for downstream circuits.
Computer Peripherals: Such as auxiliary power on motherboards, USB hubs, internal cards.
2. Communication & Networking Equipment
Network Modules: Providing power for earlier-generation Ethernet controllers and Wi-Fi modules (which often require a 3.3V supply).
Routers/Switches: Providing auxiliary power for certain chips on the board.
Optical Modules: Also used in some traditional optical transceivers.
3. Industrial Control & Automation
Industrial Control Boards: Providing 3.3V power for logic circuits, MCUs, op-amps, etc., in PLCs and industrial controllers.
Sensor Interfaces: Many sensors (temperature, pressure, humidity) operate at 3.3V, making the LD1117 an ideal power source.
Measurement & Test Equipment: Powering analog and digital circuits in data acquisition cards and instruments.
4. Automotive ElectronicsIn-Vehicle Infotainment Systems: Powering low-power components in devices like radios, navigation systems.
Body Control Modules: Such as window controllers, wiper controllers, and other ECU units requiring a stable 3.3V supply.
5. Embedded Systems & Projects
Arduino Shields: Commonly used on shields to convert a higher voltage (e.g., 5V or 9V) down to 3.3V for powering 3.3V sensors or devices.
Raspberry Pi/STM32 Development Boards: Used in custom expansion boards or projects to provide a 3.3V power rail for external components.
Electronic DIY Projects: Used in almost any hobbyist or professional project that requires stepping down from inputs like 5V/6V/9V to 3.3V.
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, 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.
INFORMATION
| Category | ||
| Mfr | ||
| Series | - | |
| Packaging | Tape & Reel (TR) Cut Tape (CT) Digi-Reel® | |
| Part Status | Active | |
| Output Configuration | ||
| Output Type | ||
| Number of Regulators | 1 | |
| Voltage - Input (Max) | 15V | |
| Voltage - Output (Min/Fixed) | 3.3V | |
| Voltage - Output (Max) | - | |
| Voltage Dropout (Max) | 1.3V @ 800mA | |
| Current - Output | ||
| Current - Quiescent (Iq) | 10 mA | |
| PSRR | 75dB (120Hz) | |
| Control Features | - | |
| Protection Features | Over Current, Over Temperature | |
| Operating Temperature | -40°C ~ 125°C | |
| Mounting Type | Surface Mount | |
| Package / Case | TO-261-4, TO-261AA | |
| Supplier Device Package | SOT-223 | |
| Base Product Number | 
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