Texas Instruments LM25149-Q1 | Demoboard LM25149-Q1EVM-2100

Description

The LM25149-Q1 is a 42-V synchronous buck DC/DC controller for high-current single-output applications. Refer to the Errata. The device uses peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM25149-Q1 can be set up in interleaved mode (paralleled output) with accurate current sharing for high-current applications. The LM25149-Q1 can operate at input voltages as low as 3.5 V, at nearly 100% duty cycle if needed. The LM25149-Q1 has two unique EMI reduction features: active EMI filter and Dual Random Spread Spectrum (DRSS). Active EMI filter senses any noise or ripple voltage on the DC input bus and injects an out-of-phase cancellation signal to reduce the noise or ripple voltage. DRSS combines a low-frequency triangular and high-frequency random modulation to optimize EMI preformance in the low-frequency and high-frequency radio frequency bands.

Features

• AEC-Q100 qualified for automotive applications:-Device temperature grade 1: –40°C to +125°C ambient operating temperature
• Two integrated EMI mitigation mechanisms-Active EMI filter for enhanced EMI performance at lower frequencies-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 filter size by 50% and lowers systems cost
• 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, 12-V, or adjustable outputs from 0.8 V to 36 V-150°C maximum junction temperature-Shutdown mode current: 2.2 µA-No-load standby current: 9 µA
• 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-Internal or external loop compensation-Thermal shutdown protection with hysteresis
• Create a custom design using the LM25149-Q1 with WEBENCH Power Designer

Typical applications

• Automotive electronic systems, infotainment systems, instrument clusters, ADAS
• High-voltage battery-operated systems

More information

• Datasheet
• IC product information