LM5146

LM5146 SNVSBV0A – JUNE 2021 – REVISED JUNE 2021 LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range 1 Features 2 Applications Functional Safety-Capable – Documentation available to aid functional safety system design Versatile synchronous buck DC/DC controller – Wide input voltage range of 5.5 V to 100 V – 150°C maximum junction temperature – 0.8-V reference with ±1% feedback accuracy – Adjustable output voltage from 0.8 V to 60 V – 40-ns tON(min) for high VIN / VOUT ratio – 140-ns tOFF(min) for low dropout – Lossless RDS(on) or shunt current sensing – Optimized for CISPR 11 and CISPR 32 Class B EMI requirements Switching frequency from 100 kHz to 1 MHz – SYNC in and SYNC out capability – Selectable diode emulation or FPWM 7.5-V gate drivers for standard VTH MOSFETs – 14-ns adaptive dead-time control – 2.3-A source and 3.5-A sink capability Fast line and load transient response – Voltage-mode control with line feedforward – High gain-bandwidth error amplifier Inherent protection features for robust design – Adjustable output voltage soft start – Hiccup-mode overcurrent protection – Input UVLO with hysteresis – VCC and gate-drive UVLO protection – Precision enable input and open-drain PGOOD indicator for sequencing and control – Thermal shutdown protection with hysteresis 20-pin VQFN package with wettable flanks Create a custom design using the LM5146 with WEBENCH® Power Designer Wireless infrastructure, cloud computing Industrial ...