Overview：

The LMR38020 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020 can continue to operate at nearly 100% duty cycle as needed during input voltage dips down to 4.2V, making it an ideal choice for wide input voltage range industrial applications and MHEV/EV systems. The LMR38020 offers flexibility with a precision enable pin that supports direct connection to wide input voltages or precise control of device startup and shutdown. A power-good flag with built-in filtering and delay provides a true indication of system status, eliminating the need for external supervisors. The device features pseudo-random spread spectrum for ultra-low EMI, and the switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise-sensitive frequency bands. Additionally, the frequency can be selected to improve efficiency at low operating frequencies or reduce solution size at high operating frequencies. The device includes built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38020 is available in an 8-pin HSOIC PowerPAD™ integrated circuit package.

Features：

Functional safety available

Documentation to aid functional safety system design

Designed for demanding industrial applications

4.2V to 80V input voltage range

2A continuous output current

40 µA ultra-low quiescent operating current

1.5 mm spacing between VIN and GND pins

Adjustable switching frequency range: 200 kHz to 2.2 MHz

Synchronizable to an external clock frequency

Spread spectrum option for reduced EMI

97% maximum duty cycle

Supports startup into pre-biased output

±1.0% tolerance voltage reference at room temperature

Precision enable pin

Easy to use with integrated compensation network for reduced BOM count

Integrated synchronous rectification

8-pin HSOIC with PowerPAD™ integrated circuit package

PFM and forced PWM (FPWM) options

1A version available: LMR38010

Create a custom design using the LMR38020 with WEBENCH® Power Designer

Applications：

Industrial transportation

Wireless infrastructure and networking

Power delivery

Factory automation and control