LMR38020SDDAR

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

Applications

• Industrial transportation
• Wireless infrastructure and network power delivery
• Factory automation and control

Key features

• Functional Safety documentation available to aid functional safety system design
• Input voltage range: 4.2 V to 80 V
• 2A continuous output current
• 40μA ultra-low quiescent current
• VIN to GND pin spacing greater than 1.5mm
• Adjustable switching frequency range: 200kHz to 2.2 MHz
• Synchronizable to external clock frequency
• Spread spectrum option for reduced EMI
• 97% maximum duty cycle
• Supports startup with pre-biased output
• ±1.0% voltage reference tolerance at room temperature
• Precision enable pin
• Easy to use with minimal BOM
• Integrated synchronous rectification
• Built-in compensation for ease of use
• 8-pin HSOIC package with PowerPAD
• PFM and forced PWM (FPWM) options
• Create custom designs with LMR38020 using WEBENCH PowerDesigner