Automotive 3.5V to 65V Dual Synchronous Buck Controller With Low IQ, SGM64620Q P2P LM5143A-Q1.


LM5143A-Q1 LM5143A-Q1.pdf



• AEC-Q100 qualified for automotive applications:

– Device temperature grade 1: –40°C to +125°C

   ambient operating temperature

• 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 65 V

– 1% accurate, fixed 3.3-V, 5-V, or adjustable

   outputs from 0.6 V to 55 V

– 150°C maximum junction temperature

– 3.3-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

– 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 25 class 5 EMI 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

• VQFN-40 package with wettable flank pins

• Create a custom design using the LM5143A-Q1

   with WEBENCH® Power Designer

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