Overview
The LM2731XMFX/NOPB is a high-performance boost converter IC produced by Texas Instruments. This device operates at fixed frequencies of either 0.6 MHz or 1.6 MHz, depending on the configuration (Y or X option, respectively). It is designed to provide efficient power conversion with a minimal footprint, thanks to its SOT-23 package. The LM2731 features a 22-V internal DMOS FET switch, which allows for high efficiency and low power loss. It is suitable for a variety of applications requiring compact and reliable power solutions.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Operating Junction Temperature | -40 | 125 | °C | |
| Lead Temperature (Soldering, 5 sec.) | 300 | °C | ||
| Input Supply Voltage (VIN) | 2.7 | 14 | V | |
| Switch Current Limit | 1.4 | 1.8 | A | |
| Switch ON-Resistance (RDS(ON)) | 300 | 400 | 550 | mΩ |
| Switching Frequency (FSW) | 0.6 (Y Option) | 1.6 (X Option) | MHz | |
| Maximum Duty Cycle | 78% (Y Option) | 86% (X Option) | 93% (Y Option), 88% (X Option) | % |
| Quiescent Current (IQ) | 2 | 500 | µA | |
| Shutdown Threshold (SHDNTH) | 0.5 | 1.5 | V |
Key Features
- High Efficiency: The LM2731 features a low RDS(ON) DMOS FET switch, ensuring minimal power loss and high efficiency.
- Compact Package: The device is packaged in a small SOT-23 package, making it ideal for space-constrained applications.
- Fixed Frequency Operation: Operates at fixed frequencies of 0.6 MHz or 1.6 MHz, depending on the configuration.
- Current Mode Control: Uses pulse-by-pulse current limiting protection and a feedback loop to maintain regulated output voltage.
- Wide Input Voltage Range: Supports input supply voltages from 2.7 V to 14 V.
- Shutdown Control: Features a shutdown control input to manage power consumption.
Applications
- Portable Electronics: Suitable for portable phones, games, and other handheld devices due to its compact size and high efficiency.
- Local Boost Regulators: Can be used as local boost regulators in various electronic systems requiring voltage boosting.
- Power Management Systems: Ideal for power management systems in embedded devices, IoT applications, and other small form factor electronics.
Q & A
- What is the operating frequency of the LM2731?
The LM2731 operates at fixed frequencies of either 0.6 MHz (Y option) or 1.6 MHz (X option).
- What is the maximum switch current limit of the LM2731?
The maximum switch current limit is 1.8 A.
- What is the typical quiescent current of the LM2731?
The typical quiescent current is between 2 µA and 500 µA, depending on the operating conditions.
- What is the input voltage range of the LM2731?
The input supply voltage range is from 2.7 V to 14 V.
- What is the package type of the LM2731?
The LM2731 is packaged in a 5-pin SOT-23 package.
- How does the shutdown control work on the LM2731?
The shutdown control is managed through the SHDN pin, which should be connected to VIN if the feature is not used. The shutdown threshold is between 0.5 V and 1.5 V.
- What is the maximum duty cycle of the LM2731?
The maximum duty cycle is 93% for the X option and 88% for the Y option.
- What is the RDS(ON) of the internal FET switch?
The RDS(ON) of the internal FET switch is between 300 mΩ and 550 mΩ.
- What kind of protection does the LM2731 offer?
The LM2731 offers pulse-by-pulse current limiting protection and thermal protection to maintain safe junction temperatures.
- What are some typical applications of the LM2731?
The LM2731 is typically used in portable electronics, local boost regulators, and power management systems in embedded devices and IoT applications.
