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42-V automotive synchronous buck DC/DC controller with ultra-low IQ & integrated active EMI filter

Inventory: 490  
Limit:  50

Quality information

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MSL rating / Peak reflow Call TI
Quality, reliability
& packaging information

Information included:

  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
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Packaging information

Package | Pins Package qty | Carrier: Operating temperature range (°C)
VQFN (RGY) | 24 3,000 | LARGE T&R
-40 to 150
Package | Pins VQFN (RGY) | 24
Package qty | Carrier: 3,000 | LARGE T&R
Operating temperature range (°C) -40 to 150
View TI packaging information

Features for the LM25149-Q1

  • 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

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Description for the LM25149-Q1

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.


Qty Price (USD)
1-99 2.87
100-249 2.515
250-999 1.763
1,000+ 1.421