LMR62421XMFX/NOPB - Texas Instruments Step-Down Voltage Regulator

The LMR62421XMFX/NOPB is a highly efficient, small form-factor, step-down voltage regulator from Texas Instruments, designed to deliver a maximum output current of 2.1A with input voltages ranging from 2.7V to 5.5V. This makes it an ideal power management solution for a wide variety of applications including portable devices, where power efficiency and space constraints are critical considerations.

This regulator integrates a 1.6MHz fixed-frequency synchronous buck converter, which allows the use of small external components, thereby reducing the overall footprint of the power supply design. The high switching frequency also enables fast transient response and good loop stability with small, low-ESR capacitors, minimizing the output voltage ripple.

One of the key features of the LMR62421XMFX/NOPB is its innovative mode-control architecture, which combines the benefits of pulse-width modulation (PWM) and pulse-frequency modulation (PFM) to optimize efficiency over the entire load range. At light loads, the device operates in PFM mode to draw less current and save power, while at moderate to heavy loads, it switches to PWM mode to provide a stable and low-noise supply.

The built-in protection features of the LMR62421XMFX/NOPB include thermal shutdown, input under-voltage lockout, and over-current protection, ensuring reliable operation under adverse conditions. The device also offers an enable pin for power sequencing and a power-good flag for system monitoring and control.

Packaged in a space-saving 6-pin TSOT-23 package, the LMR62421XMFX/NOPB is designed for easy soldering and integration into a variety of circuit boards. Texas Instruments' commitment to quality and performance is evident in this regulator's specifications, making it a top choice for engineers and designers looking for a compact, efficient, and reliable power management solution.

Key Features:

• 2.1A Output Current
• 2.7V to 5.5V Input Voltage Range
• 1.6MHz Fixed-Frequency Operation
• High-Efficiency Synchronous Buck Converter
• Mode-Control for Optimal Efficiency
• Thermal Shutdown and Over-Current Protection
• 6-pin TSOT-23 Package