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75V, 0.5A Step-Down Switching Regulator

Availability: 8,289


Package | PIN: TSSOP (PW) | 16
Temp: Q (-40 to 125)
Carrier: Partial Tube
Qty Price
1-9 $4.08
10-24 $3.67
25-99 $3.43
100-249 $3.07
250-499 $2.87
500-749 $2.50
750-999 $2.16
1000+ $2.12


  • LM5574-Q1 is an Automotive Grade Product That
    is AEC-Q100 Grade Qualified
  • −40°C to + 150°C Operating Junction
  • Integrated 75 V, 750 mΩ N-Channel MOSFET
  • Ultra-Wide Input Voltage Range From 6 V to 75 V
  • Adjustable Output Voltage as Low as 1.225 V
  • 1.65% 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
  • Package:
    • TSSOP-16

Texas Instruments  LM5574QMT/NOPB

The LM5574-Q1 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 LM5574-Q1 delivers 0.5 A of continuous output current with an integrated 750 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 LM5574-Q1 ensures robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a TSSOP-16 package. The LM5574-Q1 is supported by the full suite of WEBENCH On-Line design tools.