LM5148 80-V, Synchronous, Buck DC/DC Controller with Ultra-Low IQ and Dual Random Spread Spectrum

1 Features

Functional Safety-Capable
- Documentation available to aid functional safety system design
Integrated EMI mitigation
- Selectable dual random spread spectrum (DRSS) feature for enhanced EMI performance across low and high-frequency bands
- Optimized for CISPR 32 Class B requirements
Versatile synchronous buck DC/DC controller
- Wide input voltage range of 3.5 V to 80 V
- 1% accurate, fixed 3.3 V, 5 V, 12 V, or adjustable output from 0.8 V to 55 V
- 150°C maximum junction temperature
- Lossless DCR or shunt current sensing
- Shutdown mode current of 2.3 µA
- No-load sleep current of 9.5 µA
- Internal soft-start ramp of 3 ms
- Stackable up to two phases
- Internal bootstrap diode
Switching frequency from 100 kHz to 2.2 MHz
- SYNC in and SYNC out capability
- Selectable PFM or FPWM modes
Inherent protection features for robust design
- Internal hiccup mode overcurrent protection
- ENABLE and PGOOD functions
- VCC, VDDA, and gate-drive UVLO protection
- Internal or external loop compensation
- Thermal shutdown protection with hysteresis
Create a custom design using the LM5148 with WEBENCH® Power Designer