LM5149-Q1 Datasheet | Texas Instruments

Features - 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 - Two integrated EMI mitigation mechanisms - Active EMI Filter for enhanced EMI performance at lower frequencies - Selectable dual random spread spectrum (DRSS) for enhanced EMI performance across low and high-frequency bands - EMI reduced by an average of 25 d BµV - Reduces the external differential-mode input filter size by 50% and lowers systems cost - 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 - Shutdown mode current: 2.3 µA - No-load sleep current: 9.5 µA - Stackable up to two phases - Switching frequency from 100 k Hz to 2.2 MHz - SYNC in and SYNC out capability - Inherent protection features for robust design - Internal hiccup-mode overcurrent protection - ENABLE and PGOOD functions - VCC, VDDA, and gate-drive UVLO protection - Thermal shutdown protection with hysteresis - Create a custom design using the LM5149-Q1 with WEBENCH® Power Designer VIN = 3.5 V...80 V 2 Applications - Automotive electronic systems - Infotainment systems, instrument clusters, ADAS - Body electronics - High-voltage battery-operated systems 3 Description The LM5149-Q1 is a 80-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop pensation, fast transient response, and excellent load and line regulation. The LM5149-Q1 can be set up in dualphase mode with accurate current sharing for highcurrent applications. The device can operate with VIN as low as 3.5 V, at nearly 100% duty cycle if needed. The LM5149-Q1 has two unique EMI reduction features : active EMI filter and dual random spread...