Texas Instruments LM5149-Q1

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 compensation, 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.

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 dBµV
• 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 kHz 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

Typical applications

• Automotive electronic systems, Body electronics, Infotainment systems, instrument clusters, ADAS
• High-voltage battery-operated systems

More information

• Datasheet
• IC product information