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NCP1117ST50T3G

LDO Regulator, 1 A, Fixed and Adjustable, Positive

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NCP1117ST50T3G General Description

The NCP1117 series comprises low dropout (LDO) positive linear voltage regulators capable of delivering an output current exceeding 1.0 A. They exhibit a maximum dropout voltage of 1.2 V when supplying 800 mA, even across a range of temperatures. This series includes eight fixed output voltage options: 1.5 V, 1.8 V, 2.0 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V, and 12 V, all of which maintain regulation without needing a minimum load.

Additionally, there's an adjustable output version that can be set between 1.25 V and 18.8 V using two external resistors. The on-chip trimming ensures the reference/output voltage accuracy within +/- 1.0%. These regulators incorporate internal protection mechanisms, such as output current limiting, safe operating area compensation, and thermal shutdown.

The NCP1117 series can handle input voltages of up to 20 V. These devices are available in SOT223 and DPAK packages.

How NCP1117ST50T3G Work?

The NCP1117ST50T3G operates as a low-drop positive voltage regulator, commonly employed in switching power supply circuits to deliver a consistent and stable 5V output. A typical application of the NCP1117ST50T3G is in a full-wave diode rectifier power supply circuit. In this setup, there are three key stages:

  1. Power Transformer: This is the first stage of the circuit, and its role is to step down the high-voltage AC input (usually 220V or 120V AC) to a lower AC voltage, typically 5V AC.

  2. Diode Rectifier: The second stage of the circuit is the diode rectifier. It takes the 5V AC output from the transformer and converts it into a 5V DC output. This conversion involves converting the alternating current (AC) into direct current (DC).

  3. LD1117 Regulator: The third and final stage is where the NCP1117ST50T3G voltage regulator, often referred to as LD1117, comes into play. Its primary function is to smooth out any remaining ripple or fluctuations in the converted DC voltage from the diode rectifier. The LD1117 ensures that the output voltage is stable and remains at a constant 5V DC.

How NCP1117ST50T3G Work

How NCP1117ST50T3G Work

NCP1117 Pinout

NCP1117 Pinout

NCP1117 Pinout


ncp1117st50t3g NCP1117ST50T3G

Key Features

Specifications

  • Number of Terminals: 3
  • Maximum Input DC Voltage: Up to 20V
  • Maximum Power Dissipation: 15 Watts
  • Maximum Operating Junction Temperature: 125°C
  • Output Voltage: 5V
  • Maximum Output Current: Greater than 1.0A
  • Ripple Rejection: 64 Decibels (dB)
  • Package Type: Lead-free SOT-223

Features

  • Output Current in Excess of 1.0 A
  • 1.2 V Maximum Dropout Voltage at 800 mA Over Temperature
  • Fixed Output Voltages of 1.5 V, 1.8 V, 2.0 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V, and 12 V
  • Adjustable Output Voltage Option
  • No Minimum Load Requirement for Fixed Voltage Output Devices
  • Reference/Output Voltage Trimmed to +/- 1.0%
  • Current Limit, Safe Operating and Thermal Shutdown Protection
  • Operation to 20 V Input
  • Pb-Free Packages are Available

NCP1117ST50T3G Alternatives

  1. LM1117
  2. LM7805
  3. AMS1117
  4. MCP1700
  5. LD1117V33

NCP1117ST50T3G Datasheet PDF

Check and Download NCP1117ST50T3G Datasheet PDF here>>

NCP1117ST50T3G NCP1117ST50T3G

Application

  • Consumer and Industrial Equipment Point of Regulation
  • Active SCSI Termination for 2.85 V Version
  • Switching Power Supply Post Regulation
  • Hard Drive Controllers
  • Battery Chargers
  • Automotive

Specifications

Category Integrated Circuits (ICs)Power Management (PMIC)Voltage Regulators - Linear Series -
Output Configuration Positive Output Type Fixed
Number of Regulators 1 Voltage - Input (Max) 20V
Voltage - Output (Min/Fixed) 5V Voltage - Output (Max) -
Voltage Dropout (Max) 1.2V @ 800mA Current - Output 1A
Current - Quiescent (Iq) 10 mA PSRR 61dB (120Hz)
Control Features - Protection Features Over Current, Over Temperature
Operating Temperature 0°C ~ 125°C Mounting Type Surface Mount
Base Product Number NCP1117

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Ratings and Reviews

More
C
C**n 01/21/2024

Item as described. Packaging could be better and flux was not cleaned from the board, but everything works.

7
G
G**n 12/01/2022

The order is delivered, the give 5 star. Sorry time spent.

13
S
S**h 12/25/2021

Arrived all correct.

4

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NCP1117ST50T3G Datasheet PDF

Preliminary Specification NCP1117ST50T3G PDF Download

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