Overview
The NCP1117DT18RK is a low-dropout positive voltage regulator from onsemi, part of the NCP1117 series. This regulator is capable of providing an output current in excess of 1.0 A with a maximum dropout voltage of 1.2 V at 800 mA over temperature. It is available in fixed and adjustable output voltage configurations, making it versatile for various applications. The device features internal protection mechanisms such as output current limiting, safe operating area compensation, and thermal shutdown, ensuring reliable operation under different conditions.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Current | Iout | - | - | 1000 | mA |
| Dropout Voltage (Iout = 800 mA) | Vin-Vout | - | - | 1.2 | V |
| Fixed Output Voltage | Vout | 1.8 | - | - | V |
| Adjustable Output Voltage Range | Vout | 1.25 | - | 18.8 | V |
| Input Voltage Range | Vin | - | - | 20 | V |
| Reference/Output Voltage Accuracy | Vref | 1.238 | 1.25 | 1.262 | V |
| Ripple Rejection (Vin-Vout = 6.4 V, Iout = 500 mA) | RR | - | - | 66 | dB |
| Quiescent Current (Vin = 11.5 V) | Iq | - | - | 5.0 | mA |
| Thermal Shutdown Temperature | Tj | - | - | 175 | °C |
Key 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, 1.9 V, 2.0 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V, and 12 V
- Adjustable Output Voltage Option from 1.25 V to 18.8 V
- No Minimum Load Requirement for Fixed Voltage Output Devices
- Reference/Output Voltage Trimmed to ±1.0% Accuracy
- Current Limit, Safe Operating Area Compensation, and Thermal Shutdown Protection
- Operation to 20 V Input
- NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC-Q100 Qualified and PPAP Capable
- Pb-Free Devices
Applications
- 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
Q & A
- What is the maximum output current of the NCP1117DT18RK?
The maximum output current is in excess of 1.0 A. - What is the maximum dropout voltage at 800 mA?
The maximum dropout voltage at 800 mA is 1.2 V. - What are the available fixed output voltages for the NCP1117 series?
The fixed output voltages available are 1.5 V, 1.8 V, 1.9 V, 2.0 V, 2.5 V, 2.85 V, 3.3 V, 5.0 V, and 12 V. - Can the output voltage be adjusted?
Yes, the output voltage can be adjusted from 1.25 V to 18.8 V using two external resistors. - What is the input voltage range for the NCP1117DT18RK?
The input voltage range is up to 20 V. - Does the NCP1117DT18RK have internal protection features?
Yes, it includes output current limiting, safe operating area compensation, and thermal shutdown protection. - What are the package options for the NCP1117 series?
The devices are available in SOT-223 and DPAK packages. - Is the NCP1117DT18RK suitable for automotive applications?
Yes, the NCV prefix versions are AEC-Q100 qualified and PPAP capable, making them suitable for automotive and other demanding applications. - What is the thermal shutdown temperature of the NCP1117DT18RK?
The thermal shutdown temperature is typically at 175°C. - Are the NCP1117 series devices Pb-free?
Yes, the devices are Pb-free.
