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NCP1117DT33T5G

3.3V 1A LDO, 1.2V dropout, DPAK-3, AEC-Q100, automotive grade

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Manufacturer Part：

NCP1117DT33T5G

Package：

DPAK-3 / TO-252-3 (6.6 x 6.0 x 2.3mm)

Brand：
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Description

Product Overview

The NCP1117DT33T5G from onsemi is a 3.3V fixed-output LDO voltage regulator capable of delivering up to 1A output current. With a dropout voltage of 1.2V at 800mA and internal current limiting, it is available in a DPAK-3 surface-mount package suitable for industrial applications.

Key Specifications

Output Voltage 3.3V (fixed, +/-1%)
Output Current 1A (max)
Input Voltage Range 4.5V to 20V
Dropout Voltage 1.2V at 800mA
Line Regulation 0.2% (typical)
Load Regulation 0.2% (typical)
Quiescent Current 5 mA (typical)
Operating Temperature -40 to 125 C
Package DPAK-3 (TO-252-3)

Features

  • 1A output current in surface-mount DPAK package
  • Internal current limiting and thermal shutdown
  • +/-1% output voltage accuracy
  • No minimum load requirement
  • AEC-Q100 qualified for automotive use

Applications

  • 3.3V MCU and FPGA power supplies
  • Post-regulation for switching converters
  • Automotive ECU 3.3V rails
  • Industrial control system regulation
  • Battery charger regulation

The NCP1117DT33T5G from onsemi is a 3.3V fixed-output low-dropout linear voltage regulator from the NCP1117 series. Capable of delivering up to 1A, it features a dropout voltage of 1.2V at 800mA load and +/-1% output voltage accuracy. The internal current limiting and thermal shutdown provide robust protection. AEC-Q100 qualified, it is suitable for automotive ECU power supplies. The DPAK-3 surface-mount package offers excellent thermal dissipation for 1A output in a compact footprint.

The NCP1117DT33T5G operates as a series linear voltage regulator with PNP pass transistor. **Reference Subsystem**: A trimmed bandgap reference provides the stable 3.3V output with +/-1% accuracy over temperature and line/load variations. **Error Amplifier**: A differential amplifier compares the output voltage against the internal reference. The error signal drives the PNP pass transistor to maintain regulation. **Pass Transistor**: The PNP pass element enables low dropout operation (1.2V at 800mA) compared to NPN-based designs. At 1A output, the device dissipates significant power (PD = (VIN-VOUT) x IOUT), requiring proper PCB thermal design. **Protection Subsystem**: Current limiting restricts output current to approximately 1.2A during overload. Thermal shutdown activates when junction temperature exceeds approximately 155C, cycling on and off until the fault is removed. **Stability**: A minimum 10uF output capacitor is required for stability. Tantalum or low-ESR ceramic capacitors ensure proper phase margin in the feedback loop.

Pin Name Description
1 GND/ADJ Ground (fixed voltage version)
2 VOUT Regulated 3.3V output (connected to tab)
3 VIN Unregulated input voltage (4.5V to 20V)
Tab VOUT Thermal tab, electrically connected to VOUT (Pin 2)
  • Automotive ECU: Regulating 5V vehicle supply to 3.3V for MCU and CAN transceiver power
  • FPGA Power: Clean 3.3V I/O supply for Lattice and Xilinx FPGAs from 5V input
  • Industrial Control: Post-regulation of 5V switching supply to low-noise 3.3V
  • Battery Devices: Regulating Li-ion battery (4.2V) to 3.3V for IoT and sensor nodes
  • Communication: 3.3V rail for Ethernet PHY and RS-485 transceiver circuits
Model Manufacturer Key Difference
LM1117DT-3.3 TI Pin-compatible, 800mA, DPAK
AMS1117-3.3 AMS 1A, 1.1V dropout, SOT-223
LD1117DT33TR ST 800mA, 1.1V dropout, DPAK
NCV1117DT33T5G onsemi Automotive PPAP version, same specs
AP1117D33LI-TRG Diodes Inc 1A, 1.2V dropout, DPAK, low ESR stable
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

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Our products comply with a variety of international industry quality standards to adapt to high-standard application scenarios:
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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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