Overview
The NCP81210MNTXG, produced by onsemi, is a high-performance synchronous buck controller designed to optimize the conversion of battery or adapter voltage into power supply rails. This controller is particularly suited for applications in notebooks, tablets, and other portable electronic devices. It offers advanced features such as high resolution output voltage control, current sensing, and robust protection mechanisms.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Operating Input Voltage | V1 | 4.5 | - | 28 | V |
| Operating Input Voltage for VDRV | VDRV | 4.5 | - | 5.5 | V |
| UVLO Rising Threshold for VCC | VCCSTART | - | 4.26 | - | V |
| UVLO Hysteresis for VCC | VCCVHYS | - | 320 | - | mV |
| Output Voltage Accuracy | VFB | 0.5 | - | 2.0 | V |
| Operating Junction Temperature Range | TJ | -40 | - | 150 | °C |
| Operating Ambient Temperature Range | TA | -40 | - | 100 | °C |
| Oscillator Frequency | FSW | 528 | 600 | 672 | kHz |
Key Features
- High resolution output voltage control through an external resistor divider.
- Internal differential current sense amplifiers for cycle-by-cycle positive and negative peak current limiting.
- Programmable slew rate for output voltage transitions.
- I2C interface for configuration and monitoring.
- Robust protection mechanisms including overvoltage, undervoltage, and thermal shutdown.
- Internal transconductance amplifier with adjustable gain.
Applications
The NCP81210MNTXG is ideal for use in portable electronic devices such as notebooks, tablets, and smartphones. It is also suitable for other applications requiring high-efficiency DC-DC conversion, such as power supplies for embedded systems and consumer electronics.
Q & A
- What is the operating input voltage range for the NCP81210MNTXG?
The operating input voltage range is from 4.5 V to 28 V. - What is the typical output voltage accuracy of the NCP81210MNTXG?
The typical output voltage accuracy is within ±1% of the set voltage. - How is the output voltage controlled in the NCP81210MNTXG?
The output voltage is controlled through an external resistor divider connected to the FB pin. - Does the NCP81210MNTXG support I2C communication?
Yes, it supports I2C communication for configuration and monitoring. - What are the key protection mechanisms in the NCP81210MNTXG?
The key protection mechanisms include overvoltage, undervoltage, and thermal shutdown. - What is the typical oscillator frequency range of the NCP81210MNTXG?
The typical oscillator frequency range is from 528 kHz to 672 kHz. - How does the NCP81210MNTXG handle current sensing?
The device uses internal differential current sense amplifiers for cycle-by-cycle positive and negative peak current limiting. - Can the slew rate of the output voltage be programmed in the NCP81210MNTXG?
Yes, the slew rate can be programmed via I2C registers. - What is the operating junction temperature range of the NCP81210MNTXG?
The operating junction temperature range is from -40°C to 150°C. - What is the purpose of the internal transconductance amplifier in the NCP81210MNTXG?
The internal transconductance amplifier is used for stability in closed-loop operation and can have its gain adjusted.
