LM5143-Q1
Overview
The LM5143-Q1 is a 65-V synchronous buck DC/DC controller for high-current single or dual outputs. The device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with paralleled phases for higher output.
- 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 - Shutdown mode current: 4 µA typical - No-load standby current: 15 µA typical
- 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 - VCC, VDDA, and gate-drive UVLO protection - Thermal shutdown protection with hysteresis
- Optimized for ultra-low EMI requirements - Slew-rate controlled adaptive gate drivers - Spread spectrum reduces peak emissions - Optimized for CISPR 25 Class 5 requirements
- Switching frequency from 100 kHz to 2.2 MHz - SYNC in and SYNC out capability - Selectable diode emulation or FPWM
- VQFNP-40 pacakge with wettable flank pins
- Create a custom design using the LM5143-Q1 with WEBENCH® Power Designer
