Overview
The LM2731XMFX from Texas Instruments is a high-efficiency, current-mode boost converter designed to operate at fixed frequencies of 1.6 MHz (X option) and 600 kHz (Y option). This component is packaged in a compact 5-lead SOT-23 package, making it ideal for applications where space is limited. The LM2731 features a 22-V internal DMOS FET switch, enabling it to boost input voltages up to 20 V. The device is optimized for low power loss and high power density, making it suitable for a variety of power management needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Switching Frequency | 1.6 MHz (X Option), 600 kHz (Y Option) | MHz |
| Internal FET Switch Voltage | 22 V | V |
| Switch Current | Up to 1.8 A | A |
| Input Voltage Range | 2.7 V to 14 V | V |
| Shutdown Current | <1 µA | µA |
| Package Type | SOT-23-5 | - |
| Operating Temperature Range | -40°C to 125°C | °C |
| Lead Free Status / RoHS Status | Lead Free / RoHS Compliant | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | - |
Key Features
- 22-V DMOS FET Switch
- High switching frequencies: 1.6 MHz (X Option) and 600 kHz (Y Option)
- Low RDS(ON) DMOS FET
- Switch current up to 1.8 A
- Wide input voltage range (2.7 V to 14 V)
- Low shutdown current (<1 µA)
- Compact 5-lead SOT-23 package
- Uses tiny capacitors and inductors
- Cycle-by-cycle current limiting
- Internally compensated
- Logic-level shutdown pin
- Thermal shutdown protection
Applications
The LM2731XMFX is suitable for various applications requiring efficient power conversion in a compact form factor. These include:
- Portable electronics such as smartphones, tablets, and laptops
- Industrial control systems and automation
- Automotive systems requiring high-efficiency power conversion
- Medical devices where space and efficiency are critical
- Consumer electronics such as TVs, audio equipment, and gaming consoles
Q & A
- What are the switching frequencies of the LM2731XMFX?
The LM2731XMFX operates at fixed frequencies of 1.6 MHz (X Option) and 600 kHz (Y Option).
- What is the maximum switch current of the LM2731XMFX?
The maximum switch current is up to 1.8 A.
- What is the input voltage range of the LM2731XMFX?
The input voltage range is from 2.7 V to 14 V.
- What is the package type of the LM2731XMFX?
The LM2731XMFX is packaged in a 5-lead SOT-23 package.
- Is the LM2731XMFX RoHS compliant?
Yes, the LM2731XMFX is lead-free and RoHS compliant.
- What is the operating temperature range of the LM2731XMFX?
The operating temperature range is from -40°C to 125°C.
- Does the LM2731XMFX have built-in protection features?
Yes, it includes cycle-by-cycle current limiting and thermal shutdown protection.
- What is the typical shutdown current of the LM2731XMFX?
The typical shutdown current is less than 1 µA.
- Can the LM2731XMFX be used in high-power density applications?
Yes, the LM2731XMFX is designed for high power density applications due to its minimal power loss and use of small inductors and capacitors.
- Is the LM2731XMFX internally compensated?
Yes, the LM2731XMFX is internally compensated, which simplifies the design and reduces the component count.
