Overview
The NCP114ASN330T1G is a high-performance, 300 mA Low Dropout Linear Regulator (LDO) produced by onsemi. This device is designed to deliver very high Power Supply Rejection Ratio (PSRR) of over 75 dB at 1 kHz and excellent dynamic performance during load and line transients. It features a very low quiescent current of typically 50 μA and a standby current consumption of typically 0.1 μA, making it highly suitable for battery-powered applications such as tablets, cellular phones, and wireless devices.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Operating Input Voltage (VIN) | - | 1.7 | 5.5 | V |
| Output Voltage (VOUT) | 3.3 | - | - | V |
| Dropout Voltage | 135 mV (at 300 mA) | - | 150 mV | mV |
| Quiescent Current | 50 μA | - | - | μA |
| Standby Current Consumption | 0.1 μA | - | - | μA |
| Output Current Limit | 600 mA (typical) | - | 630 mA (short circuit) | mA |
| Operating Temperature Range | - | -40°C | 85°C | °C |
| Power Supply Rejection Ratio (PSRR) at 1 kHz | 75 dB | - | - | dB |
Key Features
- Low Dropout Voltage: Typical dropout voltage of 135 mV at 300 mA.
- High PSRR: Over 75 dB at 1 kHz, ensuring good noise rejection.
- Low Quiescent Current: Typical quiescent current of 50 μA and standby current consumption of 0.1 μA.
- Output Current Limitation: Internally limited to 600 mA, with short circuit protection up to 630 mA.
- Thermal Shutdown: Protects the device from overheating by disabling it when the die temperature exceeds 160°C.
- Enable/Disable Function: The EN pin allows for device enable/disable and active discharge control.
- Input and Output Capacitor Requirements: Recommended use of 1 μF X5R or X7R ceramic capacitors for both input and output decoupling.
Applications
The NCP114ASN330T1G is suitable for various battery-powered applications, including:
- Tablets and cellular phones.
- Wireless devices.
- Other portable electronic devices requiring low power consumption and high efficiency.
Q & A
- What is the typical dropout voltage of the NCP114ASN330T1G?
The typical dropout voltage is 135 mV at 300 mA.
- What is the quiescent current of the NCP114ASN330T1G?
The typical quiescent current is 50 μA.
- What is the maximum output current of the NCP114ASN330T1G?
The output current is internally limited to 600 mA, with short circuit protection up to 630 mA.
- What is the recommended input capacitor for the NCP114ASN330T1G?
A 1 μF X5R or X7R ceramic capacitor is recommended.
- How does the enable/disable function work on the NCP114ASN330T1G?
The EN pin allows for device enable/disable and active discharge control. If the EN pin voltage is <0.4 V, the device is disabled; if it is >0.9 V, the device is enabled.
- What is the thermal shutdown threshold for the NCP114ASN330T1G?
The device disables when the die temperature exceeds 160°C and re-enables when it falls below 140°C.
- What is the power supply rejection ratio (PSRR) of the NCP114ASN330T1G?
The PSRR is over 75 dB at 1 kHz.
- What are the recommended operating temperatures for the NCP114ASN330T1G?
The operating temperature range is from -40°C to 85°C.
- How does the active discharge function work on the NCP114ASN330T1G?
When the device is disabled, the active discharge transistor pulls the output voltage to ground through a 100 Ω resistor.
- What type of capacitors should be avoided for output decoupling?
Tantalum capacitors are not recommended due to their high ESR and temperature dependence.
