Overview
The NCP3136MNTXG, produced by onsemi, is a fully integrated synchronous buck converter designed for 3.3 V and 5 V step-down applications. This device is optimized for high efficiency, fast transient response, and features a power good indicator. It supports two operation modes: Forced Continuous Conduction Mode (FCCM) and automatic Continuous Conduction Mode/Discontinuous Conduction Mode (CCM/DCM). The automatic CCM/DCM mode allows the converter to smoothly switch between CCM and DCM, enhancing efficiency at light loads. The NCP3136MNTXG is packaged in a 3 mm x 3 mm, 16-pin QFN package, making it suitable for applications requiring a small footprint.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN) | 2.9 | 5.5 | V | |
| Output Voltage Range | 0.6 | 0.84 x VIN | V | |
| Output Current | 6.5 | A | ||
| Switching Frequency | 0.99 | 1.10 | 1.21 | MHz |
| UVLO Threshold (VIN) | 2.8 | V | ||
| UVLO Hysteresis | 110 | mV | ||
| Thermal Shutdown Threshold | 130 | 140 | 150 | °C |
| Thermal Shutdown Hysteresis | 40 | °C | ||
| Package Type | 3 mm x 3 mm, 16-pin QFN |
Key Features
- High Efficiency in Both CCM and DCM
- Operation Frequency: 1.1 MHz
- Support for MLCC Output Capacitor
- Small Footprint, 3 mm x 3 mm, 16-pin QFN Package
- Wide Input Voltage Range: 2.9 V to 5.5 V
- Output Voltage Range from 0.6 V to 0.84 x VIN
- Automatic Power-Saving Mode
- Voltage Mode Control
- Support for Pre-bias Start-up Functionality
- Output Discharge Operation
- Over-Temperature Protection
- Built-in Over-Voltage, Under-Voltage, and Over-Current Protection
- Power Good Indicator
- Pb-Free and RoHS Compliant
Applications
- 5 V Step Down Rail
- 3.3 V Step Down Rail
Q & A
- What is the input voltage range of the NCP3136MNTXG?
The input voltage range is from 2.9 V to 5.5 V.
- What are the two operation modes supported by the NCP3136MNTXG?
The device supports Forced Continuous Conduction Mode (FCCM) and automatic Continuous Conduction Mode/Discontinuous Conduction Mode (CCM/DCM).
- What is the typical switching frequency of the NCP3136MNTXG?
The typical switching frequency is 1.1 MHz.
- Does the NCP3136MNTXG support pre-bias start-up?
Yes, it supports pre-bias start-up to protect sensitive loads.
- What kind of protection mechanisms does the NCP3136MNTXG have?
The device includes over-temperature protection, built-in over-voltage, under-voltage, and over-current protection, and a power good indicator.
- What is the package type of the NCP3136MNTXG?
The device is packaged in a 3 mm x 3 mm, 16-pin QFN package.
- Is the NCP3136MNTXG Pb-Free and RoHS compliant?
Yes, it is Pb-Free and RoHS compliant.
- What is the thermal shutdown threshold of the NCP3136MNTXG?
The thermal shutdown threshold is between 130°C to 150°C.
- How does the automatic power-saving mode work in the NCP3136MNTXG?
In automatic CCM/DCM mode, when the load current decreases, the converter enters power-saving mode, reducing switching frequency and minimizing quiescent current to maintain high efficiency.
- What is the purpose of the power good indicator in the NCP3136MNTXG?
The power good indicator monitors the output voltage and outputs a high signal when the output voltage is within ±17% of the regulation voltage.
