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Texas Instruments LM63460-Q1/LM64460-Q1 Synchronous Step-Down Converters are part of a family of automotive synchronous buck DC/DC converters with excellent efficiency and ultra-low IQ. With integrated high-side and low-side MOSFETs, up to 6A of output current is delivered over a wide input voltage range from 3V to 36V, with support for load-dump transients up to 42V. The converter implements soft recovery from dropout to eliminate overshoot on the output.
The Texas Instruments LM63460-Q1/LM64460-Q1 incorporates numerous features for excellent EMI performance, including spread-spectrum frequency modulation and a low-EMI Enhanced HotRod QFN package that mitigates switch-node ringing. It also has a symmetrical pinout for ideal input capacitor placement. The switching frequency can be set between 200kHz and 2.2MHz to avoid sensitive frequency bands while optimizing efficiency or design size based on the application requirements.
PFM mode enables frequency foldback during light-load operation, allowing an unloaded current consumption of only 7µA (typical) and high light-load efficiency. A seamless transition between PWM and PFM modes, low MOSFET on-resistances, and an external bias input provide exceptional efficiency and thermal performance across the entire load range. The package has several NC pins between critical power pins, which improves the Failure Modes and Effects Analysis (FMEA) result.
