Overview
The LM27313XMFX/NOPB from Texas Instruments is a high-performance 1.6 MHz boost converter integrated circuit. It features a 30-V internal FET switch and is packaged in a compact SOT-23 package. This device is designed for applications requiring high efficiency and a small solution size. The LM27313 operates over a wide input voltage range of 2.7 V to 14 V and can deliver up to 800 mA of output current. It incorporates current-mode control for fast transient response and includes pulse-by-pulse current limiting protection and thermal shutdown for enhanced reliability.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 2.7 | - | 14 | V |
| Switch Current Limit (ISW) | 0.80 | 1.00 | 1.25 | A |
| Switch ON Resistance (RDS(ON)) | 500 | - | 650 | mΩ |
| Shutdown Threshold (VSHDN(TH)) | 0.50 | - | 1.50 | V |
| Junction Temperature (TJ) | -40 | - | 125 | °C |
| Switch Voltage (VSW(MAX)) | - | - | 30 | V |
Key Features
- High Switching Frequency: Operates at a fixed frequency of 1.6 MHz, allowing the use of small passive components.
- Current Mode Control: Provides fast transient response and includes pulse-by-pulse current limiting protection.
- Internal Compensation: No additional external components are required for the control loop.
- Logic Level Shutdown: Features a shutdown pin that allows the device to be turned on/off, consuming only 24 nA in shutdown mode.
- Thermal Protection: Includes thermal shutdown for enhanced reliability.
- Compact Package: SOT-23 package for small solution size.
- AEC-Q100 Grade 1 Qualified: Suitable for automotive applications.
Applications
The LM27313 is optimized for various applications requiring high efficiency and a small footprint. Typical applications include:
- Automotive Systems: Given its AEC-Q100 Grade 1 qualification, it is suitable for automotive power systems.
- Portable Electronics: Ideal for battery-powered devices due to its low power consumption and high efficiency.
- Industrial Power Supplies: Used in industrial power supply designs where compact size and high reliability are crucial.
- Consumer Electronics: Suitable for a wide range of consumer electronic devices requiring efficient power conversion.
Q & A
- What is the input voltage range of the LM27313?
The input voltage range is from 2.7 V to 14 V.
- What is the maximum output current of the LM27313?
The device can deliver up to 800 mA of output current.
- What is the switching frequency of the LM27313?
The LM27313 operates at a fixed frequency of 1.6 MHz.
- What type of control mode does the LM27313 use?
The LM27313 uses current-mode control.
- Does the LM27313 have built-in thermal protection?
Yes, it includes thermal shutdown for enhanced reliability.
- What is the package type of the LM27313?
The device is packaged in a SOT-23 package.
- Is the LM27313 suitable for automotive applications?
Yes, it is AEC-Q100 Grade 1 qualified.
- How does the shutdown feature work on the LM27313?
The device has a logic level shutdown pin that allows it to be turned on/off, consuming only 24 nA in shutdown mode.
- What type of capacitors are recommended for use with the LM27313?
Ceramic capacitors with X5R or X7R dielectric types are recommended.
- What are the key considerations for the layout of the LM27313 on a PCB?
Components should be placed as close as possible to the LM27313, and a 4-layer PCB with internal ground planes is recommended.
