The LM3370TLX-3006/NOPB: The fixed outputs are 1.2 V and 1.8 V, typical for powering a digital core and I/O bank in a handheld or battery-powered design. Switching at 2 MHz, it uses synchronous rectification to keep external inductor and capacitor values small — the 2 MHz rate pushes switching noise above the AM band, which helps in RF-sensitive layouts.
Package and thermal considerations for layout
The 20-DSBGA package requires microvia fan-out under the BGA. The operating temperature range is -30°C to 85°C, which covers most consumer and industrial indoor environments but not extended automotive or military. Synchronous rectification improves efficiency at light loads, but the 2 MHz switching means the power-stage loop must be tight — keep the input capacitor close to the PVIN pins and the inductor return path short. The fixed output voltages (1.2 V, 1.8 V) eliminate feedback resistor dividers, saving two resistors per rail.
How it compares to single-output automotive peers
The LMR33630APCQRNXRQ1 is a single 3 A adjustable-output buck with wettable flanks for AOI, also automotive-grade. Neither is a drop-in replacement — the LM3370 is distinct for its dual fixed-rail output in a small BGA.