Overview
The LM2731XMF from Texas Instruments is a high-performance, current-mode boost converter IC designed for a wide range of DC-DC conversion applications. It operates at fixed frequencies of either 1.6 MHz (X option) or 600 kHz (Y option), enabling fast transient response and high efficiency. The device is packaged in a compact 5-pin SOT-23 package, making it suitable for space-constrained designs. The LM2731XMF features an internal 22-V DMOS FET switch with low RDS(ON) and a peak switch current of up to 1.8 A, ensuring reliable and efficient operation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Regulator Function | Step Up | |
| Number of Outputs | 1 | |
| Maximum Input Voltage | 14 | V |
| Minimum Input Voltage | 2.7 | V |
| Maximum Output Voltage | 20 | V |
| Maximum Switching Frequency | 1.6 MHz (X option), 600 kHz (Y option) | |
| Line Regulation | 0.02 %/V | |
| Efficiency | Up to 85% | |
| Mounting Type | Surface Mount | |
| Package Type | SOT-23 | |
| Pin Count | 5 | |
| Minimum Operating Temperature | -40 | °C |
| Maximum Operating Temperature | 125 | °C |
| Dimensions | 2.92 x 1.6 x 1.02 mm |
Key Features
- Internal 22-V DMOS FET Switch: Low RDS(ON) and up to 1.8 A peak switch current.
- Fixed Frequency Operation: 1.6 MHz (X option) and 600 kHz (Y option) for fast transient response.
- Current-Mode Control: Pulse-by-pulse current limiting protection and thermal shutdown protection.
- Compact Packaging: 5-pin SOT-23 package for space-efficient designs.
- High Efficiency: Up to 85% efficiency, making it suitable for power-sensitive applications.
- Adjustable Output: Output voltage can be adjusted using an external resistive divider.
- Shutdown Control: Shutdown control input for power management.
Applications
- Portable Electronics: Suitable for battery-powered devices due to its high efficiency and compact size.
- Industrial Power Supplies: Used in various industrial applications requiring step-up DC-DC conversion.
- Automotive Systems: Can be used in automotive systems where high reliability and efficiency are crucial.
- LED Lighting: Ideal for LED lighting applications where adjustable output voltage is necessary.
- Medical Devices: Used in medical devices that require reliable and efficient power conversion.
Q & A
- What are the operating frequencies of the LM2731XMF?
The LM2731XMF operates at fixed frequencies of 1.6 MHz (X option) and 600 kHz (Y option).
- What is the maximum input voltage for the LM2731XMF?
The maximum input voltage is 14 V.
- What is the peak switch current of the LM2731XMF?
The peak switch current is up to 1.8 A.
- What is the package type of the LM2731XMF?
The package type is SOT-23 with 5 pins.
- What is the efficiency of the LM2731XMF?
The efficiency can be up to 85%.
- Can the output voltage of the LM2731XMF be adjusted?
Yes, the output voltage can be adjusted using an external resistive divider.
- What are the operating temperature ranges for the LM2731XMF?
The operating temperature range is from -40°C to 125°C.
- Does the LM2731XMF have built-in protection features?
Yes, it includes cycle-by-cycle current limiting protection and thermal shutdown protection.
- What is the typical application of the LM2731XMF in LED lighting?
It is used for adjustable output voltage in LED lighting applications.
- Is the LM2731XMF suitable for automotive systems?
Yes, it is suitable due to its high reliability and efficiency.
