特性 Features

? Functional Safety-Capable
? Documentation available to aid functional safety system design

? Versatile synchronous buck DC/DC controller
? Wide input voltage range of 3.5 V to 42 V
? 1% accurate, fixed 3.3-V, 5-V, or adjustable outputs from 0.6 V to 36 V
? 150°C maximum junction temperature
? 4-μA typical shutdown mode current
? 15-μA typical no-load standby current

? Two interleaved synchronous buck channels
? Dual channel or single-output multiphase
? 65-ns tON(min) for high VIN/VOUT ratio
? 60-ns tOFF(min) for low dropout

? Inherent protection features for robust design
? Shunt or inductor DCR current sensing
? Hiccup mode overcurrent protection
? Independent ENABLE and PGOOD functions
? Adjustable output voltage soft start
? VCC, VDDA, and gate-drive UVLO protection
? Thermal shutdown protection with hysteresis

? Optimized for CISPR 11 and CISPR 32 class B conducted and radiatedEMI requirements
? Slew-rate controlled adaptive gate drivers
? Spread spectrum reduces peak emissions

? 100-kHz to 2.2-MHz switching frequency
? SYNC in and SYNC out capability
? Selectable diode emulation or FPWM modes

? 6-mm × 6-mm VQFN-40 package
? Create a custom design using the LM25143 with WEBENCH Power Designer