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The LM5149-Q1 synchronous step-down DC/DC controller is an 80V, ultra-low IQ synchronous step-down DC/DC controller for high current, single output applications. The controller features a peak current mode control architecture with simple loop compensation, fast transient response, and excellent load and line regulation.The LM5149-Q1 can be set to bi-phase mode to provide accurate current sharing for high current applications. The device can operate from as low as 3.5V VIN and can be operated at close to 100% duty cycle as required.

The LM5149-Q1 has two unique EMI reduction features: an active EMI filter and Dual Random Spread Spectrum (DRSS). The active EMI filter detects any noise or ripple voltage on the DC input bus and injects a heterodyne cancellation signal to reduce interference, while the DRSS combines low frequency delta modulation with high frequency random modulation to reduce EMI on the low and high frequency bands respectively.

The LM5149-Q1 is available in a 3.5mm × 5.5mm thermal enhanced 24-pin VQFN package with wettable flanking pins for easy optical inspection during manufacturing.

Features

- Compliant with AEC-Q100 standard for automotive applications.

- Device temperature class 1: -40°C to +125°C ambient operating temperature range

- Functional safety type

- Documentation to assist with functional safety system design

- Two integrated EMI mitigation mechanisms

- Active EMI filter for improved EMI performance at low frequencies

- Optional Dual Random Spread Spectrum (DRSS) for enhanced EMI reduction performance at low and high frequency bands

- Average EMI reduction of 25dBµV

- Reduces external differential mode input filter size by 50% and reduces system cost

- Versatile synchronous step-down DC/DC controller

- Wide input voltage range of 3.5V to 80V

- 1% accuracy, fixed 3.3V/5V/12V or 0.8V to 55V adjustable output voltage

- 150°C maximum junction temperature

- Off mode current: 2.3µA

- No-load sleep current: 9.5µA

- Stackable up to two phases

- Switching frequency range of 100kHz to 2.2MHz

- Synchronous input and synchronous output functions

- Inherent protection features for robust designs

- Internal intermittent mode overcurrent protection

- Enable and PGOOD functions

- VCC, VDDA and gate drive UVLO protection

- Thermal shutdown protection with hysteresis function

- Create customised designs with the LM5149-Q1 and with WEBENCH® Power Designer

Applications

- Automotive electronic systems

- Infotainment systems, instrument clusters, ADAS

- Body electronics

- High-voltage battery-powered systems

• 1.Is the inventory and price seen on the platform accurate?

  A: all online goods on the shelves can be ordered online, but considering the large liquidity of spot inventory, it is not possible to achieve 100% accuracy at present. In case of any abnormality, you can contact our company online and give the corresponding solution.

• 2.Are all our products genuine?

  A: our self-supporting products are from cooperative domestic and foreign original factories or authorized agents, and the source can be traced to ensure the original and authentic products.

• 3.Can you provide the qualification certificate of the original factory or agent?

  A: at present, our self-employed brands TI，ST，ADI，NXP，LATTICE，CYPRESS，INFINEON，XILINX and other first-line brands. Other channels are the original factory and agency channels. If necessary, we can communicate and confirm according to the specific brand and model.

• 4.Can I make an inquiry through the company's website?

  A: You can inquire through the website, or by phone and email.

• 5.When can I deliver the goods after placing an order? How long will it take to get there?

  A: the delivery date is marked in most commodity information. You can estimate the delivery time of the commodity according to the delivery date. The specific arrival time depends on the warehouse where the commodity is located and the logistics mode you choose.

• 6.Can the company issue an invoice?

  A: you can issue ordinary invoices for individual users or special VAT invoices for enterprise users.