LMR38025数据手册TI中文资料规格书

描述 Description

The LMR38025 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38025 operates during input voltage dips as low as 4.2V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input industrial applications and MHEV/EV systems as the absolute maximum input voltage is 85V.

The LMR38025 features a high voltage enable pin to enable the device by connecting the device to the wide input supply voltage or by having precise UVLO control across start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum option for minimal EMI. The switching frequency can be configured between 200kHz and 2.2MHz to avoid noise sensitive frequency bands. In addition, the frequency can be programmed through the RT pin for improved efficiency at low operating frequencies or by having a smaller design size at high operating frequencies.

The device has 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 LMR38025 is available in a 12-pin WSON package.

特性 Features

Functional Safety-Capable

Documentation available to aid functional safety system design



Configured for rugged industrial applications

4.2V to 80V input voltage range

2.5A continuous output current

Ultra-low 40µA operating quiescent current

200kHz to 2.2MHz adjustable switching frequency

Frequency synchronization to external clock

97% maximum duty cycle

Supports start-up events with prebiased output

±1.5% reference voltage tolerance over temperature

Precision enable

Easy to use with integrated compensation network enabling low BOM count

Integrated synchronous rectification

12-pin WSON wettable flank with PowerPAD™ integrated circuit package

PFM and forced PWM (FPWM) options

Spread Spectrum option available



Create a custom design using the LMR38025 with the WEBENCH Power Designer