LM5576QMHX/NOPB

The LM5576 is an easy to use SIMPLE SWITCHER® buck regulator which allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6 - 75V, the LM5576 delivers 3 A of continuous output current with an integrated 170 mΩ N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture which provides inherent line regulation, tight load transient response, and ease of loop compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50 kHz to 500 kHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple ICs from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM5576 ensures robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad for thermal dissipation. The LM5576 is supported by the full suite of WEBENCH® On-Line design tools.

Applications

• Automotive
• Industrial

Key features

• Automotive Grade Product that is AEC-Q100 grade 1 Qualified (-40°C to +125°C Operating Junction Temperature) and AEC-Q100 Grade 0 Qualified (-40°C to +150°C Operating Junction Temperature)
• Integrated 75 V, 170 mΩ N-channel MOSFET
• Ultra-Wide Input Voltage Range from 6 V to 75 V
• Adjustable Output Voltage as Low as 1.225 V
• 1.5% (Q1) and 1.65% (Q0) Feedback Reference Accuracy
• Operating Frequency Adjustable Between 50 kHz and 500 kHz with Single Resistor
• Master or Slave Frequency Synchronization
• Adjustable Soft-Start
• Emulated Current Mode Control Architecture
• Wide Bandwidth Error Amplifier
• Built-in Protection
• HTSSOP-20EP (Exposed Pad)