Overview
The NCP163ASN280T1G, produced by onsemi, is a next-generation ultra-low noise, high PSRR (Power Supply Rejection Ratio) Linear Low Dropout (LDO) regulator. This device is designed to meet the stringent requirements of RF and sensitive analog circuits, offering exceptional performance in terms of noise, PSRR, and quiescent current. The NCP163 is capable of supplying up to 250 mA of output current and is available in various ultra-small package options, including WLCSP, XDFN, and SOT23-5L.
Key Specifications
| Parameter | Unit | Typical | Minimum | Maximum |
|---|---|---|---|---|
| Operating Input Voltage Range | V | - | 2.2 | 5.5 |
| Output Voltage Range | V | - | 1.2 | 5.3 |
| Output Current | mA | - | - | 250 |
| Quiescent Current | μA | 12 | - | - |
| Standby Current | μA | 0.1 | - | - |
| Dropout Voltage at 250 mA | mV | 80 | - | - |
| PSRR at 1 kHz, 20 mA | dB | 92 | - | - |
| Output Noise (10 Hz to 100 kHz) | μVRMS | 6.5 | - | - |
| Thermal Shutdown Threshold (Rising) | °C | 160 | - | - |
| Thermal Shutdown Threshold (Falling) | °C | 140 | - | - |
| Output Current Limit | mA | 700 | - | - |
Key Features
- Ultra-low noise and high PSRR, making it suitable for RF and sensitive analog circuits.
- Low quiescent current of 12 μA (typical) and standby current of 0.1 μA (typical).
- Very low dropout voltage of 80 mV at 250 mA.
- High accuracy over load and temperature with ±2% output voltage tolerance.
- Stable operation with small case size ceramic capacitors (1 μF input and output capacitors).
- Available in ultra-small packages: WLCSP4, XDFN4, and SOT23-5L.
- Pb-free, halogen-free/BFR-free, and RoHS compliant.
- Soft-start feature to prevent excessive input current during startup.
- Active discharge function to quickly discharge the output capacitor when the device is disabled.
- Internal current limit and short circuit protection.
- Thermal shutdown protection.
Applications
- Battery-powered equipment.
- Wireless LAN devices.
- Smartphones and tablets.
- Cameras, DVRs, STBs, and camcorders.
Q & A
- What is the maximum output current of the NCP163?
The NCP163 can supply up to 250 mA of output current.
- What is the typical quiescent current of the NCP163?
The typical quiescent current is 12 μA.
- What is the dropout voltage at 250 mA for the NCP163?
The dropout voltage at 250 mA is typically 80 mV.
- What is the PSRR of the NCP163 at 1 kHz and 20 mA?
The PSRR at 1 kHz and 20 mA is typically 92 dB.
- What type of capacitors are recommended for input and output decoupling?
X7R or X5R ceramic capacitors are recommended for both input and output decoupling.
- Does the NCP163 have thermal shutdown protection?
- How does the enable/disable function work on the NCP163?
The device is enabled when the EN pin voltage is greater than 1.2 V and disabled when the EN pin voltage is less than 0.4 V. In the disabled state, the output voltage is actively discharged to ground through a 280 Ω resistor.
- What is the purpose of the soft-start feature in the NCP163?
The soft-start feature ensures smooth and monotonous output voltage rising during startup, preventing excessive input current when large output capacitance is connected.
- Is the NCP163 protected against short circuits and current overloads?
- What are the package options available for the NCP163?
The NCP163 is available in WLCSP4, XDFN4, and SOT23-5L packages.
