Overview
The LMR62014XMFX/NOPB is a high-performance, current-mode boost converter from Texas Instruments. This device is part of the SIMPLE SWITCHER® family and is designed to operate over a wide input voltage range of 2.7V to 14V, with an output voltage capability of up to 20V. It features a fixed switching frequency of 1.6 MHz, which enables fast transient response and high power density. The LMR62014 is packaged in a compact SOT-23 package, making it ideal for space-constrained applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.7 to 14 | V |
| Output Voltage | Up to 20 | V |
| Switch Current | Up to 1.4 | A |
| Switching Frequency | 1.6 | MHz |
| Shutdown Current (Iq) | < 1 | µA |
| Operating Junction Temperature Range | -40 to +125 | °C |
| Lead Temperature (Soldering, 5 sec.) | 300 | °C |
| Package Type | SOT-23 |
Key Features
- Current-mode control with pulse-by-pulse current limiting protection.
- High power density due to minimal power loss and the use of small inductors and capacitors.
- Low shutdown current (< 1 µA) for power-saving in standby modes.
- Internal thermal protection to prevent overheating.
- External resistors (R1 and R2) for setting the output voltage.
- Feed-forward compensation for stability using an external capacitor (Cf).
- Recommended use of multi-layer ceramic capacitors (X5R and X7R dielectric types) for optimal performance.
- External diode selection (e.g., Schottky diode MBR0520) for handling maximum output voltage and load current.
Applications
The LMR62014XMFX/NOPB is suitable for a variety of applications requiring a high-efficiency boost converter, including:
- Portable electronics and battery-powered devices.
- Industrial control systems and automation.
- Aerospace and defense systems where high reliability is critical.
- Medical devices requiring stable and efficient power supply.
- Automotive systems where robustness and efficiency are essential.
Q & A
- What is the input voltage range of the LMR62014XMFX/NOPB?
The input voltage range is from 2.7V to 14V.
- What is the maximum output voltage that the LMR62014XMFX/NOPB can provide?
The maximum output voltage is up to 20V.
- What is the switching frequency of the LMR62014XMFX/NOPB?
The switching frequency is 1.6 MHz.
- What type of capacitors are recommended for use with the LMR62014XMFX/NOPB?
Multilayer ceramic capacitors with X5R and X7R dielectric types are recommended.
- How do I set the output voltage of the LMR62014XMFX/NOPB?
The output voltage is set using external resistors R1 and R2 according to the formula provided in the datasheet.
- What is the purpose of the feed-forward capacitor (Cf) in the LMR62014XMFX/NOPB circuit?
The feed-forward capacitor is required for stability and introduces a zero in the loop response of the converter.
- What type of diode is recommended for use in the typical application circuit of the LMR62014XMFX/NOPB?
A Schottky diode such as the MBR0520 is recommended.
- How do I ensure stable operation and low noise in the LMR62014XMFX/NOPB circuit?
Ensure careful layout of components, keep all components close to the LMR62014 device, and use a 4-layer PCB with internal ground planes.
- What is the shutdown current (Iq) of the LMR62014XMFX/NOPB when in shutdown mode?
The shutdown current is less than 1 µA.
- How do I turn off the LMR62014XMFX/NOPB device?
The device is turned off by pulling the shutdown pin low. If this function is not used, the pin should be tied directly to VIN.
