NCP1117DT33
Low dropout voltage regulators, 3.3V output, 1A, DPAK package
Manufacturer： ['onsemi', 'rochester', 'lrc']
series introduction
# NCP1117DT33 Product Series Introduction
## 1. Overview
The NCP1117DT33 is a part of a highly reliable and widely - used voltage regulator product series. Voltage regulators are crucial components in electronic circuits as they ensure a stable output voltage regardless of variations in the input voltage or load current. The NCP1117DT33 is specifically designed to provide a fixed 3.3V output voltage, making it an ideal choice for a vast range of electronic applications that require a stable 3.3V power supply.
## 2. Key Features
### 2.1 Low Dropout Voltage
One of the most significant features of the NCP1117DT33 is its low dropout voltage. Dropout voltage is the minimum difference between the input voltage and the output voltage required for the regulator to maintain a stable output. The low dropout characteristic of this series allows it to operate efficiently even when the input voltage is only slightly higher than the 3.3V output. For example, in battery - powered applications where the battery voltage gradually decreases over time, the NCP1117DT33 can continue to provide a stable 3.3V output until the battery voltage drops close to the dropout voltage level.
### 2.2 High Output Current Capability
The NCP1117DT33 can deliver a relatively high output current. It is capable of supplying up to 1A of continuous output current, which makes it suitable for powering a variety of medium - to high - power components such as microcontrollers, digital signal processors (DSPs), and some types of integrated circuits. This high - current capability ensures that the regulator can meet the power demands of complex electronic systems.
### 2.3 Excellent Line and Load Regulation
Line regulation refers to the ability of the regulator to maintain a constant output voltage when the input voltage changes. Load regulation, on the other hand, is the regulator's ability to keep the output voltage stable as the load current varies. The NCP1117DT33 offers excellent line and load regulation performance. It can maintain the output voltage within a tight tolerance, typically ±1% for line regulation and ±1.5% for load regulation. This high - precision regulation ensures that the connected electronic components receive a stable and accurate power supply, which is essential for their proper operation.
### 2.4 Thermal Shutdown and Current Limiting Protection
To enhance the reliability and safety of the regulator, the NCP1117DT33 is equipped with thermal shutdown and current limiting protection features. The thermal shutdown mechanism automatically turns off the regulator when its temperature exceeds a certain threshold. This protects the device from overheating, which could otherwise lead to permanent damage. The current limiting feature restricts the output current to a safe level, preventing excessive current flow that could damage the regulator or the connected load in case of a short - circuit or other abnormal conditions.
## 3. Package and Pin Configuration
The NCP1117DT33 is available in a TO - 220 package. The TO - 220 package is a popular through - hole package known for its good thermal dissipation properties. It allows for easy mounting on printed circuit boards (PCBs) and provides a relatively large surface area for heat transfer.
The pin configuration of the NCP1117DT33 in the TO - 220 package typically consists of three pins:
- **Input Pin (VIN)**: This pin is connected to the input voltage source. The input voltage should be higher than the output voltage (3.3V) by at least the dropout voltage of the regulator.
- **Output Pin (VOUT)**: The regulated 3.3V output voltage is available at this pin. It is connected
Images for reference
DPAK_369C
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