LM5145 75-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range

1 Features

Versatile synchronous buck DC/DC controller
- Wide input voltage range of 6 V to 75 V
- 0.8-V reference with ±1% feedback accuracy
- Adjustable output voltage from 0.8 V to 60 V
- 40-ns t_ON(min) for high V_IN / V_OUT ratio
- 140-ns t_OFF(min) for low dropout
- Optimized for CISPR 32 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 V_TH MOSFETs
- 14-ns adaptive dead-time control
- 2.3-A source and 3.5-A sink capability
- Low-side soft start for prebiased start-up
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 LM5145 with WEBENCH® Power Designer