Overview
The NCP1117ISTAT3G, produced by onsemi, is a low-dropout positive voltage regulator from 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. The device is available in fixed and adjustable output voltage configurations, making it versatile for various applications.
The NCP1117ISTAT3G is specifically the 3.3 V fixed output version, which eliminates the need for external resistors for voltage setting. It features on-chip trimming that adjusts the reference/output voltage to within ±1.0% accuracy. The device includes internal protection features such as output current limiting, safe operating area compensation, and thermal shutdown, ensuring reliable operation.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage | Vin | - | - | 20 | V |
| Output Voltage (Fixed 3.3 V) | Vout | 3.235 | 3.3 | 3.365 | V |
| Output Current | Iout | - | - | 1.0 | A |
| Dropout Voltage (at 800 mA) | Vdropout | - | - | 1.2 | V |
| Quiescent Current (Vin = 15 V) | Iq | - | - | 6.0 | mA |
| Ripple Rejection (Vin-Vout = 6.4 V, Iout = 500 mA) | RR | - | - | 62 | dB |
| Operating Temperature Range | Tj | -40 | - | 125 | °C |
Key Features
- Output Current in Excess of 1.0 A
- 1.2 V Maximum Dropout Voltage at 800 mA Over Temperature
- Fixed Output Voltage of 3.3 V with No Minimum Load Requirement
- Reference/Output Voltage Trimmed to ±1.0%
- Current Limit, Safe Operating Area Compensation, and Thermal Shutdown Protection
- Operation to 20 V Input
- Pb-Free Device
- AEC-Q100 Qualified and PPAP Capable for Automotive and Other Applications Requiring Unique Site and Control Change Requirements
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 NCP1117ISTAT3G?
The maximum output current is in excess of 1.0 A.
- What is the maximum dropout voltage at 800 mA?
The maximum dropout voltage is 1.2 V at 800 mA over temperature.
- What is the fixed output voltage of the NCP1117ISTAT3G?
The fixed output voltage is 3.3 V.
- Does the NCP1117ISTAT3G require a minimum load to maintain regulation?
No, the fixed output voltage devices do not require a minimum load to maintain regulation.
- What are the internal protection features of the NCP1117ISTAT3G?
The device includes output current limiting, safe operating area compensation, and thermal shutdown protection.
- What is the operating temperature range of the NCP1117ISTAT3G?
The operating temperature range is from -40°C to 125°C.
- Is the NCP1117ISTAT3G AEC-Q100 qualified?
- What type of packages are available for the NCP1117 series?
The devices are available in SOT-223 and DPAK packages.
- What is the purpose of the input bypass capacitor in the NCP1117ISTAT3G circuit?
The input bypass capacitor is required for regulator stability if the device is located more than a few inches from the power source, reducing circuit sensitivity and enhancing output transient response.
- What is the recommended capacitance value for the output capacitor?
A minimum capacitance value of 4.7 μF with an equivalent series resistance (ESR) within specified limits is recommended for output stability.
