Overview
The NCP81231MNTXG is a high-resolution buck controller produced by onsemi, designed to optimize the conversion of battery or adapter voltage into power supply rails for various consumer devices. This controller is fully compliant with the USB Power Delivery Specification when used in conjunction with a USB PD or C-Type Interface Controller. It is particularly suited for applications in notebook, tablet, and desktop systems, as well as other devices utilizing USB PD and C-Type cables.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer / Brand | onsemi |
| Category | Integrated Circuits (ICs) > PMIC - Voltage Regulators - DC DC Switching Controllers |
| Description | IC REG CTLR USB-PD 32QFN |
| Lead Free Status / RoHS Status | ROHS3 Compliant |
| Voltage - Supply (Vcc/Vdd) | 4.5V ~ 28V |
| Topology | Buck |
| Synchronous Rectifier | Yes |
| Supplier Device Package | 32-QFN (5x5) |
| Package / Case | 32-VFQFN Exposed Pad |
| Output Type | Transistor Driver |
| Output Phases | 1 |
| Output Configuration | Positive |
| Operating Temperature | -40°C ~ 100°C (TA) |
| Number of Outputs | 1 |
| Mounting Type | Surface Mount |
| Function | Step-Down |
| Frequency - Switching | 150kHz ~ 1.2MHz |
| Duty Cycle (Max) | 100% |
| Control Features | Current Limit, Enable |
| Serial Interfaces | I²C |
Key Features
- Wide Input Voltage Range: From 4.5 V to 28 V, making it versatile for various power sources.
- Dynamically Programmed Frequency: Adjustable from 150 kHz to 1.2 MHz, allowing for optimized performance based on application needs.
- I²C Interface: Enables communication and configuration through a standard I²C interface.
- Real Time Power Good Indication: Provides real-time monitoring of the power output status.
- Controlled Slew Rate Voltage Transitioning: Ensures smooth and controlled voltage transitions.
- Feedback Pin with Internally Programmed Reference: Allows for precise output voltage regulation.
- High Resolution DAC Voltage: Supports a wide range of output voltages with high resolution.
- Two Independent Current Sensing Inputs: Enables accurate current monitoring and limiting.
- Support for Inductor DCR Sensing: Allows for efficient current sensing using the inductor's DCR.
- Over Temperature Protection: Protects the device from overheating.
- Adaptive Non-Overlap Gate Drivers: Ensures efficient and safe switching operations.
- Filter Capacitor Switch Control: Optimizes the use of filter capacitors.
- 100% Duty Cycle Operation: Supports continuous operation at maximum duty cycle.
- Latched Over-Voltage and Over-Current Protection: Provides robust protection against over-voltage and over-current conditions.
- Dead Battery Power Support: Allows the device to operate even when the battery is dead.
Applications
The NCP81231MNTXG is designed for use in a variety of consumer electronics, including:
- Notebook computers
- Tablets
- Desktop systems
- Devices using USB Power Delivery (USB PD) and C-Type cables
It is particularly useful in applications requiring dynamically controlled slew rate limited output voltage and compliance with USB PD specifications.
Q & A
- What is the input voltage range of the NCP81231MNTXG?
The input voltage range is from 4.5 V to 28 V.
- What is the switching frequency range of the NCP81231MNTXG?
The switching frequency can be dynamically programmed from 150 kHz to 1.2 MHz.
- Does the NCP81231MNTXG support I²C communication?
Yes, it supports I²C interface for configuration and communication.
- What is the operating temperature range of the NCP81231MNTXG?
The operating temperature range is from -40°C to 100°C.
- What type of protection does the NCP81231MNTXG offer?
The device offers over-temperature protection, latched over-voltage and over-current protection, and dead battery power support.
- How does the NCP81231MNTXG handle current sensing?
The device has two independent current sensing inputs and supports inductor DCR sensing.
- Can the NCP81231MNTXG operate at 100% duty cycle?
Yes, it supports 100% duty cycle operation.
- What is the package type of the NCP81231MNTXG?
The device is packaged in a 32-VFQFN Exposed Pad (5x5 mm).
- Is the NCP81231MNTXG compliant with USB Power Delivery Specification?
Yes, it is fully compliant with the USB Power Delivery Specification when used with a USB PD or C-Type Interface Controller.
- What are the key features of the NCP81231MNTXG's feedback and output voltage profile?
The device features a feedback pin with an internally programmed reference, high resolution DAC voltage, and adjustable output voltage profile through an external resistor divider.
