LM5576 6V to 75V, 3A Wide Vin Step-Down Regulator | TI.com


6V to 75V, 3A Wide Vin Step-Down Regulator

6V to 75V, 3A Wide Vin Step-Down Regulator - LM5576

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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 - 75 V, 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.


  • LM5576-Q1 is an 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
    + 150°COperating 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
  • 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)

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Parametrics Compare all products in Buck Converter (Integrated Switch)

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Package Group
Current Mode    
-40 to 125    
HTSSOP | 20    

WEBENCH® Designer LM5576

Product Option
  Min   Max Range
Vin  V 6.0 to 75.0V
Vout  V 1.225 to 75V
Iout  A 3.00A
Ambient Temp  °C -40 to 125°C