Overview
The NCP115CMX180TCG is a 300 mA Low Dropout (LDO) linear regulator produced by onsemi. This device is designed to provide a stable and accurate output voltage with low noise, making it suitable for space-constrained and noise-sensitive applications. It is particularly optimized for battery-operated portable devices, featuring dynamic quiescent current adjustment to minimize power consumption at no-load conditions.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Operating Input Voltage Range | 1.7 to 5.5 | V |
| Output Voltage | 1.8 | V |
| Output Current | 300 | mA |
| Quiescent Current (No Load) | 50 | μA |
| Standby Current Consumption | 0.1 | μA |
| Dropout Voltage (at 300 mA, VOUT = 2.8 V) | 250 | mV |
| Output Voltage Accuracy (at Room Temperature) | ±1% | |
| Power Supply Ripple Rejection (at 1 kHz) | 70 dB | |
| Thermal Shutdown Threshold | 160°C | |
| Package Type | XDFN4 |
Key Features
- Very low quiescent current of typically 50 μA to optimize battery life in portable applications.
- Soft start feature with two VOUT slew rate speed options to manage startup transients.
- Low dropout voltage of 250 mV typical at 300 mA @ 2.8 V.
- High power supply ripple rejection (PSRR) of 70 dB at 1 kHz.
- Thermal shutdown and current limit protections for robust design.
- Active discharge function available in certain versions (e.g., NCP115A and NCP115C) to quickly discharge the output capacitor when the device is disabled.
- Stable operation with a 1 μF ceramic output capacitor.
- Pb-free devices.
Applications
- PDAs, mobile phones, GPS, and smartphones.
- Wireless handsets, wireless LAN, Bluetooth®, and Zigbee® devices.
- Portable medical equipment.
- Other battery-powered applications.
Q & A
- What is the operating input voltage range of the NCP115CMX180TCG?
The operating input voltage range is from 1.7 V to 5.5 V.
- What is the typical quiescent current of the NCP115CMX180TCG?
The typical quiescent current is 50 μA.
- What is the dropout voltage at 300 mA for a 2.8 V output?
The dropout voltage is typically 250 mV at 300 mA for a 2.8 V output.
- Does the NCP115CMX180TCG have thermal shutdown protection?
Yes, the device has thermal shutdown protection that disables the device when the die temperature exceeds 160°C typical.
- What is the recommended output capacitor value for stability?
The recommended output capacitor value is 1 μF with an X7R or X5R dielectric.
- How does the enable pin (EN) function on the NCP115CMX180TCG?
The EN pin enables the device when the voltage is above 0.9 V and disables it when the voltage is below 0.4 V. It also controls the active discharge function in certain versions.
- What is the power supply ripple rejection ratio (PSRR) of the NCP115CMX180TCG?
The PSRR is 70 dB at 1 kHz.
- Is the NCP115CMX180TCG suitable for battery-powered applications?
Yes, it is optimized for battery-powered applications due to its low quiescent current and dynamic quiescent current adjustment.
- What are the package options for the NCP115CMX180TCG?
The device is available in XDFN4 and TSOP-5 packages.
- Does the NCP115CMX180TCG have current limit protection?
Yes, the device has an internal current limit protection that limits the output current to typically 600 mA.
